[go: up one dir, main page]

EP2147131A1 - Procédé de passivation thermochimique d'acier inoxydable - Google Patents

Procédé de passivation thermochimique d'acier inoxydable

Info

Publication number
EP2147131A1
EP2147131A1 EP08715970A EP08715970A EP2147131A1 EP 2147131 A1 EP2147131 A1 EP 2147131A1 EP 08715970 A EP08715970 A EP 08715970A EP 08715970 A EP08715970 A EP 08715970A EP 2147131 A1 EP2147131 A1 EP 2147131A1
Authority
EP
European Patent Office
Prior art keywords
stainless steel
acid
aqueous solution
heat treatment
salt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08715970A
Other languages
German (de)
English (en)
Other versions
EP2147131B1 (fr
Inventor
Olaf BÖHME
Siegfried Piesslinger-Schweiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poligrat GmbH
Original Assignee
Poligrat GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Poligrat GmbH filed Critical Poligrat GmbH
Priority to PL08715970T priority Critical patent/PL2147131T3/pl
Publication of EP2147131A1 publication Critical patent/EP2147131A1/fr
Application granted granted Critical
Publication of EP2147131B1 publication Critical patent/EP2147131B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50—Treatment of iron or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/02—Pretreatment of the material to be coated

Definitions

  • the present invention relates to a novel method of passivating stainless steel surfaces which provides improved corrosion resistance of the treated surfaces as well as increasing the resistance of these surfaces to thermal discoloration.
  • the process consists of a chemical treatment with an aqueous solution comprising complexing agents, a rinsing and a subsequent thermal treatment in a gaseous, oxygen-containing atmosphere.
  • Stainless steel which is often referred to as stainless steel, is an iron alloy which, in addition to iron, may contain a number of other elements such as chromium, nickel, molybdenum, copper and others.
  • the chromium present in the alloy reacts with oxygen from the environment at the surface and forms an oxide layer on the surface of the material.
  • the resulting chromium oxide can reliably form a dense layer on the surface and thus protects the workpiece from corrosion.
  • This protective layer is also called a passive layer.
  • Such a passive layer is usually about 10 molecule layers thick and contains in addition to the chromium oxide especially iron oxide in a concentration of 10-55% by weight.
  • the corrosion resistance of the workpiece depends on the content of chromium and other alloying elements such as nickel and molybdenum.
  • These further Legie ⁇ guide elements of the stainless steel alloy may be added to the Corrosion resistance to further improve, if the addition of chromium alone is not able to give the workpiece the desired degree of corrosion resistance or other characteristics.
  • these other corrosion resistance improving elements are expensive and thus increase the cost of manufacturing the stainless steel to a considerable extent.
  • defect-free and dense passive layer on the surface of the stainless steel workpiece, which has the highest possible ratio of chromium to iron in the passive layer.
  • a defect-free and dense passive layer is also able to significantly increase the corrosion resistance of the workpiece.
  • passivation processes are usually used, that is, the surfaces of the stainless steel workpieces are treated with oxidizing media, usually with a treatment with dilute nitric acid or hydrogen peroxide or phosphoric acid, which is often after one Pickling the surface is performed.
  • Another known measure to increase corrosion resistance is to increase the ratio of chromium to iron in the passive layer.
  • treatment of the surface with substances that have a high affinity for iron ions and thus are able to selectively dissolve out and bind iron ions from the passive layer is suitable for this purpose.
  • aqueous solutions of complexing agents and / or chelating agents such as citric acid are frequently used, for example, the chromium / iron ratio on bright rolled or ground stainless steel surfaces of a value of 0.8 to 1.2 before treatment to a value from 3.0 to 5.0 after treatment.
  • This increased content of chromium oxide causes a correspondingly improved corrosion resistance of the workpiece.
  • thermally grown oxide layers significantly reduce the corrosion resistance of the stainless steel by either preventing the formation of true passive layers or displacing existing passive layers at higher temperatures.
  • thermally generated oxide layers such as the tarnish or scale described above
  • thermally generated oxide layers such as the tarnish or scale described above
  • no method is known in the prior art, which improves the resistance of stainless steel surfaces against thermal discoloration, ie against the formation of such thermally generated oxide layers.
  • the aim of the present invention is a method for passivation of stainless steel surfaces, which in comparison to known passivation method according to the prior art, a significant increase in the corrosion potential, measured as pitting potential according to DIN 50900 causes.
  • the increase in corrosion potential that can be achieved with the methods described herein ranges from +500 mV to +850 mV from the initial state. This makes it possible in many cases, instead of expensive molybdenum or copper-containing materials cheaper To use stainless steel grades that have the required corrosion resistance due to their passivation according to a method of the present invention.
  • Figure 1 shows the pitting potential of untreated and chemically treated stainless steel grade 1.4301 after each 30 minutes of heat treatment at the indicated temperatures.
  • FIG. 2 shows the pitting potential of untreated and chemically treated stainless steel of quality 1.4016 after 30 minutes of heat treatment at the indicated temperatures.
  • FIG. 3 shows the pitting potential of stainless steel of the quality 1.4301 over a heat treatment at 140 ° C.
  • Figure 4 shows the pitting potential of stainless steel of quality 1.4016 over time of a heat treatment at 140 0 C.
  • the corrosion resistance of the stainless steel surface can be markedly improved both for workpieces made of stainless steel with ferritic and also with austenitic structures by targeted heat treatment of the surfaces in an oxygen-containing atmosphere.
  • This heat treatment in an oxygen-containing atmosphere is often referred to below as heat treatment or thermal treatment.
  • the stainless steel workpiece is heated to a temperature of at least
  • the upper limit of the temperature to be used is given by the temperature at which a thermally induced discoloration of the stainless steel surface begins and varies depending on the quality of stainless steel used. If this upper limit of the temperature range is exceeded and thus reaches a temperature range in which there is a thermal discoloration of the stainless steel, the corrosion resistance of the treated workpiece drops again.
  • a suitable Heat treatment can often increase the pitting potential in accordance with DIN 50900 by about +100 to +150 mV and even by up to about +200 mV and more.
  • the present invention thus relates to a method for passivating stainless steel, wherein the stainless steel is first subjected to a chemical treatment with an aqueous solution, then rinsed with water and subsequently a heat treatment is carried out.
  • the aqueous solution used in the chemical treatment comprises at least one complexing agent combination and one oxidizing agent.
  • the complexing agent combination consists of those compounds known to complex iron ions in aqueous solution.
  • the invention is based in particular on the observation that only with a combination of the complexing agents a passivation effect is achieved, which satisfies the objectives of the invention.
  • complexing agents are used in particular 0 Hydroxcarbon Textren, phosphonic acids and organic nitrosulfonic acids.
  • the complexing agents used are preferably multidentate complexing agents. These multidentate complexing agents can form chelate complexes with the iron ions and therefore contribute to further increasing the ratio of chromium oxide to iron oxide in the passive layer.
  • suitable complexing agents include, for example, hydroxycarboxylic acids which contain 1, 2 or 3 hydroxyl groups and 1, 2 or 3 carboxyl groups or salts thereof.
  • a particularly suitable example of such a hydroxycarboxylic acid is citric acid.
  • Another suitable complexing agent is a phosphonic acid of the general structure R'-PO (OH) 2 , where R 'is a monovalent alkyl, hydroxyalkyl or aminoalkyl radical, or else a diphosphonic acid of the general structure R "[- PO (OH) 2 ] 2 , wherein R "is a divalent alkyl, hydroxyalkyl or aminoalkyl radical.
  • R'-PO (OH) 2 a phosphonic acid of the general structure R'-PO (OH) 2
  • R ' is a monovalent alkyl, hydroxyalkyl or aminoalkyl radical
  • R "[- PO (OH) 2 ] 2 wherein R "is a divalent alkyl, hydroxyalkyl or aminoalkyl radical.
  • nitrosulphonic acids ie the nitroalkylsulphonic acids, nitroarylsulphonic acids or their salts.
  • a particularly preferred nitroarylsulfonic acid is / 77ete-nitrobenzenesulfonic acid.
  • the acid or salt has sufficient solubility in the aqueous solution.
  • the carbon chains whether linear, branched, cyclic or aromatic, comprise not more than about 12 carbon atoms, more preferably not more than 10 carbon atoms, and most preferably not more than 6 carbon atoms.
  • oxidizing agent Another essential ingredient of the aqueous solution in the chemical treatment is an oxidizing agent.
  • This oxidizing agent should preferably be sufficient to ensure a normal potential of at least +300 mV in the solution.
  • Suitable oxidizing agents include, for example, nitrates, peroxo compounds, iodates and cerium (IV) compounds in the form of the respective acids or the corresponding water-soluble salts.
  • peroxo compounds are peroxides, persulfates, perborates or else percarboxylates, such as peracetate. These oxidizing agents can be used alone or in the form of mixtures.
  • the term "stainless steel” refers to iron alloys containing at least 13% chromium by weight. Further corrosion resistance improving elements may be included in the alloy.
  • the chemical treatment according to the invention is not to be confused with a conventional pickling process, in which targeted metal from the surface of a metallic Workpiece is removed (see DE 92 14 890 Ul and WO 88/00252 Al).
  • the inventors of the present application suspect that the special effect of the method according to the invention is attributable to the fact that a passive layer is not first produced, but an already existing passive layer is changed in its composition and structure by the sequence of the method steps according to the invention. But this is rather a theoretical idea that can not be understood in the sense of a limitation of the present method.
  • the aqueous solutions may also comprise one or more wetting agents which reduce the surface tension of the aqueous solution.
  • suitable wetting agents are, for example, the nitroalkyl or nitroarylsulfonic acids already described in the case of the complexing agents, or also alkylglycols of the general structure H- (O-CHR-CH 2 ) n-OH, where R is hydrogen or an alkyl radical having 1, 2 or 3 Is carbon atoms, and n is preferably an integer between 1 and 5, for example 2 or 3; or other wetting agents.
  • a particularly suitable example of an aqueous solution which can be used in the first step of the treatment according to the present invention comprises the following composition: 0.5-10% by weight, in particular 3.0-5.0% by weight %, at least one hydroxycarboxylic acid having 1 to 3 hydroxyl and 1 to 3 carboxyl groups or their salt (s),
  • alkyl glycol of the general structure H- (O-CHR-CH 2 ) n -OH, where R Is hydrogen or an alkyl radical of 1-3 carbon atoms and n is 1-5, and
  • the at least one hydroxycarboxylic acid comprises citric acid, and / or the at least one phosphonic acid or diphosphonic acid HEDP, and / or the at least one nitroaryl or nitroalkylene sulfonic acid / 77-nitrobenzenesulfonic acid, and / or the at least one alkyl glycol, ethylene glycol and or butyl glycol, and the oxidizing agent nitrate, peroxide, persulfate and / or cerium (IV) ions, in each case in the weight ratios indicated above.
  • compositions may be added to the above compositions in a concentration between 0.02 and 2.0% by weight, preferably between 0.05 and 1.0% by weight.
  • thickening agents may optionally be added to these compositions. These thickening agents, for example diatomaceous earth, can serve to increase the viscosity of the solution.
  • the chemical treatment in aqueous solution is preferably carried out in a dip bath, so that such thickeners can be dispensed with.
  • the aqueous solution preferably has a pH which is less than 7, preferably less than 4. This can be achieved by the aqueous solution containing at least one acid.
  • a preferred method is that at least one of the complexing agents and / or at least one of the oxidizing agents is at least partially added in the form of an acid to the solution.
  • the first step of the treatment according to the present invention is carried out according to a preferred embodiment in an aqueous solution having a temperature of at most about 70 0 C. It is further preferred that the treatment takes place in aqueous solution at a temperature between room temperature and 6O 0 C.
  • the chemical treatment in aqueous solution is preferably carried out over a period of at least 60 minutes, for example, the chemical treatment can be carried out with an aqueous solution over a period of 1-4 hours.
  • the workpiece is rinsed with water, preferably deionized water, to remove the passivating solution, and optionally dried, before the workpiece enters the passivation solution
  • Water preferably deionized water
  • Temperature treatment is subjected. This rinsing can be done by spraying or by (possibly repeated) immersion in a dipping bath or by combinations of these rinsing methods.
  • the step of heat treatment is carried out at a temperature of at least 80 0 C in an oxygen-containing atmosphere.
  • the heat treatment is preferably carried out at a temperature in the range between 80 0 C and 280 0 C, in particular at a temperature above 100 0 C and of at most 260 0 C.
  • the oxygen-containing atmosphere of the thermal treatment may be air in a preferred embodiment.
  • the oxygen-containing atmosphere is primarily water vapor or a mixture of water vapor and air.
  • Such a steam-containing atmosphere is preferably used at a temperature of at least 100 ° C.
  • the optimum temperature range for the heat treatment depends essentially on the type of stainless steel to be treated. However, this optimum range can easily be determined by a person of ordinary skill in trial experiments.
  • a suitable temperature in a range between 100 0 C and 270 0 C, preferably between 150 0 C and 260 0 C, in particular between 220 0 C and 26O 0 C, when the stainless steel is an austenitic steel having a content of about 16- 20 wt .-% chromium and about 7-10 wt .-% nickel, such as stainless steel grade 1.4301 (see Figure 1).
  • the term "essentially none" means that the elements in question, if present at all, are present in a concentration of less than 1% by weight, generally between 0 and 0.1% by weight, in the alloy.
  • This heat treatment should take place over a period of at least 2 minutes (see, for example, FIG. 3 for quality 1.4301 stainless steel).
  • the meicillin over a period of 15-45 min, for example, for about 30 min.
  • too long a thermal treatment for example over several hours, can lead to a fall in the corrosion resistance of the treated workpiece.
  • Another important advantage of the method described here is that it is not only suitable for significantly increasing the corrosion resistance, measured as the pitting potential according to DIN 50900, compared to the starting state, but that the method is also suitable for improving the resistance of To increase stainless steel workpieces against thermal discoloration.
  • Such an increase in the resistance of stainless steel workpieces or their surfaces to thermal discoloration in their use by a passivation process has not hitherto been described and represents a further significant advantage of the invention described herein.
  • the prior art includes, inter alia also a method for cleaning and
  • DE 39 91 748 C2 discloses the treatment of the polished surface with an oxidizing process in an oxidizing high-temperature gas atmosphere following electrochemical pre-polishing of a stainless steel material.
  • the temperature of this process step is above 300 ° C.
  • the process according to the invention usually takes place at temperatures below 300 ° C.
  • the invention additionally relates to an aqueous solution for carrying out a process according to the invention, wherein the aqueous solution comprises a complexing agent combination and contains 3.0-10% by weight of the abovementioned hydroxycarboxylic acid or acids as one of the complexing agents.
  • this aqueous solution contains an oxidizing agent as defined above.
  • the complexing agent combination is, as discussed in detail above, preferably formed by at least one hydroxycarboxylic acid, at least one phosphonic acid and at least one nitroaryl or nitroalkyl sulfonic acid.
  • the aqueous solution may additionally contain an alkylglycol.
  • the subject matter of the invention is furthermore a metal workpiece with at least one stainless steel surface, obtainable by subjecting the workpiece to a method as described herein.
  • Example 1 Stainless steel of quality 1.4301
  • Two 1.5 mm thick stainless steel sheets (A and B) of the quality 1.4301 with an austenitic structure and a content of 18% by weight of chromium and 8% by weight of nickel in the alloy, which is a cold-rolled and bright-annealed surface were alkaline degreased in the original state, rinsed clean with deionized water and dried. Subsequently, the pitting potential was measured according to DIN 50900. The pitting potential for both plates was +550 mV in the initial state.
  • the chemical treatment was carried out for 180 min at 40 0 C.
  • the sheet was subsequently rinsed with deionized water and dried in air.
  • the pitting potential of plate B was measured at +750 mV, an increase of +200 mV compared to the initial state.
  • both sheets (A and B) were heated in an oven at 240 0 C for a period of 30 min. After cooling, the sheet B treated in the passivating solution showed no color change, while the untreated sheet A was colored straw yellow.
  • the subsequent measurement of the pitting potential resulted in the following results:
  • sheet D was treated in a passivating solution, the composition of which is described in Example 1.
  • the treatment takes place at room temperature (+ 22 ° C) for a duration of 2.5 h.
  • the plate was rinsed clean with deionized water, dried in air and the pitting potential measured at +520 mV, an increase from the initial state by +150 mV.
  • both sheets C and D were heated in an oven at 140 0 C for a period of 30 min. After cooling both panels showed no color change. In determining the pitting potential, the following results were obtained:
  • the pitting potential of plate E was +480 mV, which is +110 mV higher than in the initial state, but 90 mV below the value obtained in a thermal treatment in the optimum range (see Example 2).
  • the pitting potential of Sheet F was +520 mV, which was the value measured before the heat treatment. However, this value is about 380 mV below the pitting potential of +900 mV, which was determined after treatment in the optimum temperature range, which is about +140 0 C (see Example 2, sheet D), although in sheet metal F showed no temperature-related discoloration.
  • this example shows that when exceeding the optimal temperature range for a certain quality stainless steel corrosion resistance decreases again, but still higher than before the passivation treatment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

L'invention concerne un procédé pour améliorer la résistance à la température et à la corrosion d'acier inoxydable par un nouveau procédé de passivation. Ce procédé est constitué d'un traitement chimique avec une solution aqueuse qui comprend une combinaison d'agents complexants et au moins un agent d'oxydation, suivi d'un rinçage puis d'un traitement à température accrue dans une atmosphère contenant de l'oxygène. Les surfaces en acier inoxydables obtenues selon l'invention présentent une couche passive homogène avec une résistance chimique accrue et une résistance accrue aux décolorations thermiques.
EP08715970A 2007-03-05 2008-02-22 Procédé de passivation thermochimique d'acier inoxydable Active EP2147131B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08715970T PL2147131T3 (pl) 2007-03-05 2008-02-22 Sposób termochemicznej pasywacji stali szlachetnej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010538A DE102007010538A1 (de) 2007-03-05 2007-03-05 Verfahren zum thermochemischen Passivieren von Edelstahl
PCT/EP2008/001419 WO2008107082A1 (fr) 2007-03-05 2008-02-22 Procédé de passivation thermochimique d'acier inoxydable

Publications (2)

Publication Number Publication Date
EP2147131A1 true EP2147131A1 (fr) 2010-01-27
EP2147131B1 EP2147131B1 (fr) 2011-08-17

Family

ID=39432890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08715970A Active EP2147131B1 (fr) 2007-03-05 2008-02-22 Procédé de passivation thermochimique d'acier inoxydable

Country Status (8)

Country Link
US (1) US8430973B2 (fr)
EP (1) EP2147131B1 (fr)
JP (1) JP5222308B2 (fr)
AT (1) ATE520802T1 (fr)
DE (1) DE102007010538A1 (fr)
ES (1) ES2370088T3 (fr)
PL (1) PL2147131T3 (fr)
WO (1) WO2008107082A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090660A1 (fr) * 2013-12-18 2015-06-25 Poligrat Gmbh Procédé de production de surfaces colorées en acier spécial

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182095A1 (fr) * 2008-10-29 2010-05-05 Poligrat Gmbh Procédé destiné au traitement de surfaces en acier inoxydable
US8906579B2 (en) * 2009-05-14 2014-12-09 GM Global Technology Operations LLC Low contact resistance coated stainless steel bipolar plates for fuel cells
EP2617866A1 (fr) 2012-01-23 2013-07-24 Merz Pharma GmbH & Co. KGaA Procédé et composition de préparation d'instruments médicaux
DE102012107807A1 (de) 2012-08-24 2014-02-27 Paul Hettich Gmbh & Co. Kg Verfahren zur Herstellung eines metallischen Bauteils eines Beschlages, Ofenbeschlag und Ofen mit Pyrolysereinigungsfunktion
DE102014203412B4 (de) 2013-02-25 2025-08-21 Zschimmer & Schwarz Mohsdorf GmbH & Co. KG. Verfahren, Formulierung und Verwendung der Formulierung zur gleichzeitigen Entschichtung und Passivierung von Edelstahloberflächen
CN103225087B (zh) * 2013-04-26 2015-04-01 河南师范大学 一种不锈钢酸洗钝化膏及其制备方法
US9202483B1 (en) * 2015-01-02 2015-12-01 HGST Netherlands B.V. Iron-oxidized hard disk drive enclosure cover
EP3162558A1 (fr) 2015-10-30 2017-05-03 Outokumpu Oyj Composant constitué d'un matériau composite métallique et procédé pour la fabrication du composant par formage à chaud
CN106637175B (zh) * 2016-11-09 2019-02-22 深圳市麦滕医疗器械有限公司 外科手术器械用马氏体型抗菌不锈钢的表面钝化处理方法
US10683576B2 (en) 2017-03-27 2020-06-16 Baker Hughes, A Ge Company, Llc Corrosion inhibitors for passivation of galvanized coatings and carbon steel
JP7299012B2 (ja) * 2018-12-17 2023-06-27 株式会社Ｉｈｉインフラシステム 不動態化処理方法、不動態化処理液及び不動態化処理容器
CN114086189B (zh) * 2021-11-24 2024-03-08 宁波吉海金属科技有限公司 一种环保型不锈钢酸洗钝化液

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601379A1 (fr) * 1986-07-09 1988-01-15 Commissariat Energie Atomique Produit decapant pour pieces en acier et procede de decapage utilisant ce produit
DE3991748T1 (fr) * 1989-09-21 1991-10-10
US5354383A (en) 1991-03-29 1994-10-11 Itb, S.R.L. Process for pickling and passivating stainless steel without using nitric acid
DE4237021C1 (de) * 1992-11-02 1994-02-10 Poligrat Gmbh Mittel zum Beizen der Oberfläche von Chromnickelstählen und Chromstählen sowie Verwendung des Mittels
DE9214890U1 (de) * 1992-11-02 1993-01-07 Poligrat GmbH, 8000 München Mittel zum Beizen und/oder Reinigen von Metalloberflächen
CA2200587C (fr) * 1994-09-26 2001-02-27 Sadiq Shah Traitement a l'acide de l'acier inoxydable
IT1276954B1 (it) 1995-10-18 1997-11-03 Novamax Itb S R L Processo di decapaggio e di passivazione di acciaio inossidabile senza impiego di acido nitrico
AUPO371096A0 (en) * 1996-11-18 1996-12-12 Green, Bruce Phillip Corrosion inhibiting composition
CA2253679A1 (fr) * 1998-01-26 1999-07-26 Elf Atochem S.A. Passivation des aciers inoxydables en milieu acide organosulfonique
AUPQ633200A0 (en) * 2000-03-20 2000-04-15 Commonwealth Scientific And Industrial Research Organisation Process and solution for providing a conversion coating on a metallic surface I
US7524383B2 (en) * 2005-05-25 2009-04-28 Tokyo Electron Limited Method and system for passivating a processing chamber
US20090120457A1 (en) * 2007-11-09 2009-05-14 Surface Chemistry Discoveries, Inc. Compositions and method for removing coatings and preparation of surfaces for use in metal finishing, and manufacturing of electronic and microelectronic devices

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008107082A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090660A1 (fr) * 2013-12-18 2015-06-25 Poligrat Gmbh Procédé de production de surfaces colorées en acier spécial

Also Published As

Publication number Publication date
DE102007010538A1 (de) 2008-09-11
ES2370088T3 (es) 2011-12-12
WO2008107082A1 (fr) 2008-09-12
JP5222308B2 (ja) 2013-06-26
WO2008107082A8 (fr) 2008-11-20
US8430973B2 (en) 2013-04-30
PL2147131T3 (pl) 2012-01-31
EP2147131B1 (fr) 2011-08-17
US20100132844A1 (en) 2010-06-03
JP2010521581A (ja) 2010-06-24
ATE520802T1 (de) 2011-09-15

Similar Documents

Publication Publication Date Title
EP2147131B1 (fr) Procédé de passivation thermochimique d'acier inoxydable
DE102007061193B4 (de) Wälzbeanspruchtes Bauteil und Verfahren zur Oberflächenbehandlung eines wälzbeanspruchten Bauteils
EP2255026B1 (fr) Passivation optimisée à base de ti-zr de surfaces métalliques
DE102009044821B4 (de) Behandlungslösung und Verfahren zur Beschichtung von Metalloberflächen
DE4312417A1 (de) Verfahren zur Erhöhung der Korrosionsbeständigkeit von nichtrostendem Stahl
WO2005061761A1 (fr) Traitement de conversion en deux etapes
DE3711095A1 (de) Verfahren zur erzeugung von konversionsueberzuegen auf zink- oder zinklegierungsoberflaechen
DE1182928B (de) Verfahren und Loesung zum Nachbehandeln von Phosphatschichten
EP1678344B1 (fr) Procede essentiellement exempt de chrome destine a la passivation de surfaces metalliques en zn, alliages de zn, al ou alliages d'al
DE2315180C2 (de) Phosphatierungslösung
DE69304516T2 (de) Verfahren und zusammensetzung zur reinigung von aluminium- und aluminiumlegierungsoberflächen
EP1816234B1 (fr) Procédé et composition aqueuse pour la passivation du zinc ou des alliages à base de zinc
EP2352860B1 (fr) Procédé destiné au traitement de surfaces en acier inoxydable
DE3232396C2 (fr)
DE3009931C2 (de) Mittel zum Schützen von Stahloberflächen
DE1295962B (de) Verfahren und Zusatzmittel zur Herstellung von Boehmit auf Aluminiumoberflaechen
DE2715291C3 (de) Verfahren zur Herstellung einses amorphen, leichten, fest haftenden Phosphatüberzugs auf Eisenmetalloberflächen
DE3780078T2 (de) Korrosionsbestaendige beschichtung.
DE3033961C2 (de) Wäßriges Bad zum anodischen Entfernen von Metallüberzügen von einem davon verschiedenen Grundmetall sowie ein Verfahren zum anodischen Entfernen von Metallüberzügen unter Verwendung dieses Bades
DE2239581C3 (de) Lösung und Verfahren zum Aufbringen von Überzügen auf Zink oder Zinklegierungen
DE102013107011A1 (de) Verfahren zum Beschichten von Cu-Langprodukten mit einer metallischen Schutzschicht und mit einer metallischen Schutzschicht versehenes Cu-Langprodukt
EP2821520A1 (fr) Procédé de revêtement de produits plats en acier avec une couche de protection métallique et produits plats en acier revêtus d'une couche de protection métallique
DE102014203412A1 (de) Verfahren und Formulierung zur gleichzeitigen Entschichtung und Passivierung von Edelstahloberflächen
DE102012213317B4 (de) Lagerbauteil und Verfahren zum Brünieren eines Lagerbauteils
EP3559313A1 (fr) Composition contenant des ions diazonium pour le prétraitement anticorrosion de pièces métalliques

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090826

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: C23C 22/82 20060101ALI20110215BHEP

Ipc: C23C 22/74 20060101ALN20110215BHEP

Ipc: C23C 22/50 20060101AFI20110215BHEP

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008004523

Country of ref document: DE

Representative=s name: WUESTHOFF & WUESTHOFF PATENT- UND RECHTSANWAEL, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008004523

Country of ref document: DE

Representative=s name: WUESTHOFF & WUESTHOFF, PATENTANWAELTE PARTG MB, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008004523

Country of ref document: DE

Effective date: 20111117

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2370088

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20111212

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111217

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111117

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111219

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111118

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E013217

Country of ref document: HU

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

26N No opposition filed

Effective date: 20120521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120328

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008004523

Country of ref document: DE

Effective date: 20120521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120222

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008004523

Country of ref document: DE

Representative=s name: WUESTHOFF & WUESTHOFF, PATENTANWAELTE PARTG MB, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502008004523

Country of ref document: DE

Owner name: POLIGRAT DEUTSCHLAND GMBH, DE

Free format text: FORMER OWNER: POLIGRAT GMBH, 81829 MUENCHEN, DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BOVARD SA NEUCHATEL CONSEILS EN PROPRIETE INTE, CH

Ref country code: CH

Ref legal event code: PUE

Owner name: POLIGRAT DEUTSCHLAND GMBH, DE

Free format text: FORMER OWNER: POLIGRAT GMBH, DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: POLIGRAT DEUTSCHLAND GMBH

Effective date: 20190919

REG Reference to a national code

Ref country code: HU

Ref legal event code: FH1C

Free format text: FORMER REPRESENTATIVE(S): DR. SVINGOR ADAM, DANUBIA SZABADALMI ES JOGI IRODA KFT., HU

Representative=s name: DANUBIA SZABADALMI ES JOGI IRODA KFT., HU

Ref country code: HU

Ref legal event code: GB9C

Owner name: POLIGRAT DEUTSCHLAND GMBH, DE

Free format text: FORMER OWNER(S): POLIGRAT GMBH, DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: PD

Owner name: POLIGRAT DEUTSCHLAND GMBH; DE

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: POLIGRAT GMBH

Effective date: 20191010

REG Reference to a national code

Ref country code: BE

Ref legal event code: PD

Owner name: POLIGRAT DEUTSCHLAND GMBH; DE

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), CESSION

Effective date: 20191007

REG Reference to a national code

Ref country code: AT

Ref legal event code: PC

Ref document number: 520802

Country of ref document: AT

Kind code of ref document: T

Owner name: POLIGRAT DEUTSCHLAND GMBH, DE

Effective date: 20191202

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20200213 AND 20200219

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20211220

Year of fee payment: 15

Ref country code: GB

Payment date: 20211220

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20211229

Year of fee payment: 15

Ref country code: NL

Payment date: 20211220

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20220216

Year of fee payment: 15

Ref country code: HU

Payment date: 20220209

Year of fee payment: 15

Ref country code: FI

Payment date: 20220215

Year of fee payment: 15

Ref country code: CH

Payment date: 20220216

Year of fee payment: 15

Ref country code: AT

Payment date: 20220216

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20220216

Year of fee payment: 15

Ref country code: IT

Payment date: 20220228

Year of fee payment: 15

Ref country code: ES

Payment date: 20220318

Year of fee payment: 15

Ref country code: CZ

Payment date: 20220211

Year of fee payment: 15

Ref country code: BE

Payment date: 20220216

Year of fee payment: 15

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20230301

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 520802

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230222

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230223

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230301

Ref country code: HU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230223

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230228

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20240405

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230222

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250218

Year of fee payment: 18