FR2478131A1 - PROCESS FOR MAKING STEEL RESISTANT TO CORROSION AND PRODUCTS OBTAINED - Google Patents
PROCESS FOR MAKING STEEL RESISTANT TO CORROSION AND PRODUCTS OBTAINED Download PDFInfo
- Publication number
- FR2478131A1 FR2478131A1 FR8023410A FR8023410A FR2478131A1 FR 2478131 A1 FR2478131 A1 FR 2478131A1 FR 8023410 A FR8023410 A FR 8023410A FR 8023410 A FR8023410 A FR 8023410A FR 2478131 A1 FR2478131 A1 FR 2478131A1
- Authority
- FR
- France
- Prior art keywords
- nickel
- copper
- steel
- alloy
- product
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 title claims description 32
- 239000010959 steel Substances 0.000 title claims description 32
- 238000005260 corrosion Methods 0.000 title abstract description 20
- 230000007797 corrosion Effects 0.000 title abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 42
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 21
- 229910052759 nickel Inorganic materials 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011253 protective coating Substances 0.000 claims description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 2
- 238000009877 rendering Methods 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 25
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910000792 Monel Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 229920000825 Fique Polymers 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- -1 perborates Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- 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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Coating By Spraying Or Casting (AREA)
- Physical Vapour Deposition (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
PROCEDE POUR RENDRE RESISTANTS A LA CORROSION DES ARTICLES EN ACIER. IL COMPREND LA FORMATION SUR CES ARTICLES DE DEUX COUCHES, L'UNE DE NICKEL ET L'AUTRE DE CUIVRE ET LE TRAITEMENT THERMIQUE PAR RECUIT DE L'ARTICLE AINSI REVETU A TEMPERATURE ELEVEE DANS UNE ATMOSPHERE GAZEUSE REDUCTRICE.PROCESS FOR RENDERING CORROSION RESISTANT TO STEEL ARTICLES. IT INCLUDES THE TRAINING ON THESE ARTICLES OF TWO LAYERS, ONE OF NICKEL AND THE OTHER OF COPPER, AND THE THERMAL TREATMENT BY annealing of the article thus coated at elevated temperature in a reducing gas atmosphere.
Description
Procédé pour rendre l'acier résistant à la corrosionProcess for making steel corrosion resistant
et produits obtenus.and products obtained.
L'invention est relative à un procédé permettant The invention relates to a method for
de rendre l'acier résistant à la corrosion. Elle est égale- to make the steel corrosion resistant. She is also
ment relative aux produits ainsi obtenus. ment relating to the products thus obtained.
Plus particulièrement l'invention concerne une méthode ou procédé pour protéger des produits faits en acier des phénomènes de corrosion dans des milieux aqueux contenant des sels oxydants tels que des perborates, des More particularly the invention relates to a method or method for protecting products made of steel from corrosion phenomena in aqueous media containing oxidizing salts such as perborates,
hypochlorites et analogues et/ou contenant des-chlorures. hypochlorites and analogues and / or containing chlorides.
Il est bien connu que des phénomènes de corrosion peuvent apparaître dans de tels milieux. Pour les surmonter il est courant de constituer les objets en des aciers inoxydables au chrome et au nickel ou en acier dont les surfaces It is well known that corrosion phenomena can occur in such environments. To overcome them, it is common to constitute objects in stainless steels with chromium and nickel or steel whose surfaces
comportent des revêtements de nickel ou de chrome. have nickel or chrome coatings.
Cependant les solutions proposées jusqu'à ce jour ne se sont pas révélées complètement satisfaisantes, même si la durée de vie opérationnelle des produits métalliques respectifs a pu être prolongée et leur résistance au milieu corrosif sus-mentionné accrue. En fait et dans de tels milieux corrosifs on constate l'apparition de phénomènes localisés de corrosion qui, dans le cas de pièces faites en acier inoxydable austénitique, se produisent surtout dans des régions soumises à des tensions (corrosion sous tension) However, the solutions proposed to date have not proved to be completely satisfactory, even if the operational life of the respective metal products has been extended and their resistance to the corrosive medium mentioned above increased. In fact and in such corrosive environments one notes the appearance of localized phenomena of corrosion which, in the case of parts made of austenitic stainless steel, occur especially in regions subjected to tensions (corrosion under tension)
et sont dues à la formation de couples actifs-passifs(cor- and are due to the formation of active-passive couples (cor-
rosion par piqûres et fissures). Dans le cas de pièces ayant leur surface revêtue (par exemple au nickel) les phénomènes de corrosion les plus sérieux apparaissent dès que sont présents dans leur revêtement des rayures, des fissures ou des craquelures; la base d'acier subit alors une corrosion rapide et est rapidement mise hors service au niveau de ses points ou zones déficients dans lesquels pitting and cracking). In the case of parts having their surface coated (for example with nickel) the most serious corrosion phenomena appear as soon as there are scratches, cracks or cracks in their coating; the steel base then undergoes rapid corrosion and is quickly taken out of service at its defective points or zones in which
sont susceptibles-de se produire ces phénomènes localisés. these localized phenomena are likely to occur.
En conséquence l'invention a pour but de fournir un procédé permettant de rendre incorrodables ou résistants à la corrosion des produits ou articles faits en acier, particulièrement lorsqu'il s'agit de ceux qui doivent être 2478l31 utilisés dans des milieux chlorés et/ou fortement oxydants, cette résistance à la corrosion devant être durable même pour le cas o des défauts locaux tels que inclusions, piqûres, fissures déformations sous tension et analogues apparaîtraient à la surface. Dans l'un de ces aspects la présente invention fournit des pièces ou articles résistant à la corrosion comprenant un corps en acier dont la surface est revêtue Consequently, the object of the invention is to provide a process which makes it possible to make products or articles made of steel corrosion-resistant or corrosion-resistant, particularly when these are to be used in chlorinated and / or strongly oxidizing, this resistance to corrosion must be durable even in the case where local defects such as inclusions, pitting, cracks deformation under tension and the like would appear on the surface. In one of these aspects the present invention provides corrosion resistant parts or articles comprising a steel body with a coated surface.
par un revêtement protecteur formé d'un alliage cuivre- by a protective coating formed of a copper alloy-
nickel.nickel.
Dans l'un de ses aspects supplémentaires l'invention fournit un procédé pour former la pièce ou article en acier résistant à la corrosion comprenant les étapes qui consistent à déposer sur la surface du corps en acier de la pièce ou article deux couches métalliques, l'une étant de cuivre et l'autre de nickel,et à soumettre la pièce ou In one of its additional aspects the invention provides a method for forming the corrosion-resistant steel part or article comprising the steps which consist in depositing on the surface of the steel body of the part or article two metallic layers, '' one being copper and the other nickel, and to submit the coin or
article à un traitement thermique de recuit à une tempéra- article at a temperature annealing heat treatment
ture de 950 à,11500C,dans une atmosphère gazeuse réduc- ture from 950 to, 11500C, in a reduced gaseous atmosphere
trice,dans des conditions telles que l'on obtienne sur la surface de la pièce ou article un revêtement protecteur under conditions such that a protective coating is obtained on the surface of the part or article
formé d'un alliage cuivre-nickel.formed of a copper-nickel alloy.
Par conséquent, le procédé selon l'invention comprend la formation d'un double dépôt d'une couche de nickel et d'une couche de cuivre, ces couches pouvant être appliquées dans un ordre quelconque. Les étapes de dépôt de ces couches peuvent être effectuées par toute méthode appropriée pour effectuer des dépôts métalliques, par exemple des méthodes électrochimiques ou chimiques, à la flamme oxyacétylènique,par métallisation, plasma, etc. La pièce en acier qui doit effectivement être traitée par le procédé en cause peut être formée de tout type d'acier, qu'il s'agisse d'aciers au carbone, d'aciers alliésou combinés-, d'aciersinoxydables, d'aciers spéciaux, etc. L'épaisseur totale des deux couches sus-mentionnées peut varier selon les besoins, d'un minimum de 1 micron jusqu'à environ 50 microns ou même davantage. Les épaisseurs relatives des deux couches respectivement de cuivre et de Consequently, the method according to the invention comprises the formation of a double deposit of a layer of nickel and of a layer of copper, these layers being able to be applied in any order. The steps for depositing these layers can be carried out by any suitable method for carrying out metallic deposits, for example electrochemical or chemical methods, with an oxyacetylene flame, by metallization, plasma, etc. The steel part which must actually be treated by the process in question can be made of any type of steel, be it carbon steels, alloyed or combined steels, stainless steels, steels specials, etc. The total thickness of the two above-mentioned layers can vary as required, from a minimum of 1 micron to about 50 microns or even more. The relative thicknesses of the two layers of copper and
nickel peuvent également varier selon des besoins spéci- nickel may also vary according to specific needs
fiques; par exemple un intervalle d'épaisseursappropriées fiques; for example an appropriate thickness range
pour la couche de cuivre est de 1 à 15 microns. for the copper layer is 1 to 15 microns.
Après le dépôt des deux couches susdites on effec- After the two aforementioned layers have been deposited,
tue un traitement thermique visant à la formation de kills a heat treatment aimed at the formation of
l'alliage,a recuit dans un four à une température d'envi- the alloy, annealed in an oven at a temperature of approx.
ron 950 ë environ 1 1500C dans une atmosphère réductrice. ron 950 to about 1 1500C in a reducing atmosphere.
Celle-ci peut consister en hydrogène pur ou, de préférence un mélange d'hydrogène et d'azote et/ou d'argon, ces mélanges possédant une teneur minimum en hydrogène de 10 % La conséquence du traitement thermique est que les deux couches du revêtement tendent à-entrer dans une forme alliée, c'est-à-dire qu'il se produit un alliage à partir des constituants de ces deux couches ainsi que de la This can consist of pure hydrogen or, preferably a mixture of hydrogen and nitrogen and / or argon, these mixtures having a minimum hydrogen content of 10% The consequence of the heat treatment is that the two layers of the coating tend to enter an alloyed form, that is to say an alloy is produced from the constituents of these two layers as well as from the
base métallique,notamment de l' acier traité. La compo- metallic base, especially treated steel. The composition
sition de l'alliage obtenu est sujette à variations dans l'épaisseur du revêtement et dépend aussi de l'ordre de dépôt des couches. Le premier traitement thermique de formation d'alliage peut être suivi si nécessaire par -un second traitement thermique à haute température dans une atmosphère contenant 02 ou H20 ou CO2 ou d'autres agents oxydants appropriés,de façon à conférer une certaine sition of the alloy obtained is subject to variations in the thickness of the coating and also depends on the order in which the layers are deposited. The first heat treatment for alloy formation can be followed if necessary by a second heat treatment at high temperature in an atmosphere containing O 2 or H 2 O or CO2 or other suitable oxidizing agents, so as to confer a certain
couleur ou des couleurs différentes aux couches d'alliage. color or different colors to the alloy layers.
Dans un mode de mise en oeuvre du procédé dans lequel on dépose d'abord la couche de nickel et ensuite In an embodiment of the method in which the nickel layer is first deposited and then
la couche de cuivre,on obtient à la fin du traitement ther- the copper layer, at the end of the heat treatment,
mique formant un alliage une couche externe consistant en mique forming an alloy an outer layer consisting of
un alliage riche en cuivre, c'est-à-dire du type cupro- a copper-rich alloy, i.e. of the cupro- type
nickel,et une couche interne de revêtement entre la couche externe et la pièce en acier traité consistant en un alliage riche en nickel, c'est-àdire du type connu dans le commerce sous la désignation Monel. En outre le nickel, and an internal coating layer between the external layer and the treated steel part consisting of an alloy rich in nickel, that is to say of the type known in the trade under the designation Monel. Furthermore the
traitement de recuit va également conduire à la forma- annealing treatment will also lead to the formation
tion d'une couche de transition entre la surface de la pièce d'acier traité, cette couche de transition étant en contact direct avec la première couche de revêtement, à tion of a transition layer between the surface of the piece of treated steel, this transition layer being in direct contact with the first coating layer,
base de nickel dans le cas considéré, et résultant de la dif- nickel base in the case under consideration, and resulting from the dif-
fusion du nickel dans l'acier et dans la formation d'un acier allié riche en nickel. Le produit qui est obtenu dans ce cas présente une couche d'alliage(revêtement) ayant un potentiel galvanique (dans les milieux corrosifs oxydants sus-mentionnés) qui varie à partir de valeurs externes plus positives à la surface extérieure du re- vêtement formé, à des valeurs internes moins positives, cette variation étant continue et permettant aux matériaux melting of nickel in steel and in the formation of alloy steel rich in nickel. The product which is obtained in this case has an alloy layer (coating) having a galvanic potential (in the corrosive oxidizing media mentioned above) which varies from more positive external values on the outer surface of the coating formed, to less positive internal values, this variation being continuous and allowing the materials
nobles formés dans le revêtement de passer vers le maté- nobles formed in the coating to pass to the material-
riau passivable, c'est-à-dire vers l'acier de la pièce de base dans des conditions assurant une protection anodique passivable path, i.e. towards the steel of the base part under conditions ensuring anodic protection
de cette dernière.of the latter.
Dans une variante de mise en oeuvre du procédé on dépose sur la pièce d'acier d'abord la couche de cuivre et ensuite le couche de nickel. Dans ce cas et après le traitement thermique, le revêtement anti-corrosion obtenu sera formé d'une couche extérieure ou externe formée d'un alliage riche en nickel, c'est-à-dire du type Monel, et d'une couche interne formée d'un alliage du type cupronickel, c'est-à-dire un alliage plus riche en cuivre. La zone de transition à la surface de la pièce en acier sera dans ce cas le résultat de la diffusion du cuivre dans l'acier et consistera en un alliage d'acier au cuivre. On obtiendra dans ce dernier cas une pièce protégée contre la corrosion dont la couche extérieure, faite d'un alliage du type Monel, présente une résistance améliorée ou accrue à des agents corrosifs,tandis que la zone de transition à la surface de In a variant implementation of the process, the copper layer is first deposited on the steel part and then the nickel layer. In this case and after the heat treatment, the anti-corrosion coating obtained will be formed of an outer or outer layer formed of a nickel-rich alloy, that is to say of the Monel type, and of an inner layer. formed of an alloy of the cupronickel type, that is to say an alloy richer in copper. The transition zone on the surface of the steel part will in this case be the result of the diffusion of copper in the steel and will consist of a steel alloy with copper. In the latter case, a corrosion-protected part will be obtained, the outer layer of which, made of a Monel type alloy, has improved or increased resistance to corrosive agents, while the transition zone on the surface of
l'acier sous le revêtement a une teneur en cuivre supéri- the steel under the coating has a higher copper content
eure à la normale, cette teneur assurant une résistance à would be normal, this content ensuring resistance to
la corrosion accrue et par conséquent permettant une pro- increased corrosion and therefore allowing a pro-
tection anodique intrinsèque.intrinsic anodic protection.
Ainsi par le procédé de l'invention on obtient des Thus, by the process of the invention,
pièces, produits ou articles d'acier qui présentent une ré- steel parts, products or articles which exhibit
sistance importante à la corrosion, particulièrement à la corrosion en milieu oxydant, eu aux corrosions du fait de significant resistance to corrosion, particularly to corrosion in an oxidizing medium, due to corrosion due to
tensions, piqûres, fissures, etc. En outre et si néces- tensions, punctures, cracks, etc. In addition and if necessary
saireil se forme au niveau du-produit une autoprotection anodique efficace qui lui garantit une longue durée de service et saireil forms effective product anodic self-protection which guarantees a long service life and
ce nmêe lorsqu'apparaissent des phénOcEènes de corrosion localisés. this also occurs when localized corrosion phenomena appear.
24?7813 124? 7813 1
Claims (8)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT20536/80A IT1129633B (en) | 1980-03-12 | 1980-03-12 | PROCEDURE FOR THE ANTI-CORROSIVE TREATMENT OF STEEL PRODUCTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2478131A1 true FR2478131A1 (en) | 1981-09-18 |
Family
ID=11168414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8023410A Pending FR2478131A1 (en) | 1980-03-12 | 1980-10-31 | PROCESS FOR MAKING STEEL RESISTANT TO CORROSION AND PRODUCTS OBTAINED |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE3039731A1 (en) |
| ES (2) | ES496290A0 (en) |
| FR (1) | FR2478131A1 (en) |
| GB (1) | GB2076432A (en) |
| IT (1) | IT1129633B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0551566A1 (en) * | 1991-12-25 | 1993-07-21 | SHINKO KOSEN KOGYO KABUSHIKI KAISHA also known as SHINKO WIRE CO.LTD. | Color-developing plated metal for spring and the method of using the same |
| WO2010085827A1 (en) * | 2009-01-27 | 2010-08-05 | Andritz Hydro Gmbh | Apparatus and method for producing workpieces having a surface made of rust-proof metal |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3017910B2 (en) * | 1993-04-16 | 2000-03-13 | 神鋼鋼線工業株式会社 | Method of manufacturing spring products |
| GB2320033B (en) * | 1996-12-05 | 2001-06-06 | Fmc Corp | Improvements in strength and wear resistance of mechanical components |
| DE102016218688A1 (en) * | 2016-09-28 | 2018-03-29 | Bayerische Motoren Werke Aktiengesellschaft | Process for producing a hydrogen-carrying steel component for use in motor vehicles, hydrogen-carrying steel component and motor vehicle with a hydrogen-carrying steel component |
| CN116356386A (en) * | 2023-04-19 | 2023-06-30 | 温州大学 | A method of preparing Ni-Cu corrosion-resistant alloy coating by spray electrodeposition and laser quenching |
-
1980
- 1980-03-12 IT IT20536/80A patent/IT1129633B/en active
- 1980-10-16 GB GB8033335A patent/GB2076432A/en not_active Withdrawn
- 1980-10-21 DE DE19803039731 patent/DE3039731A1/en not_active Withdrawn
- 1980-10-27 ES ES80496290A patent/ES496290A0/en active Granted
- 1980-10-31 FR FR8023410A patent/FR2478131A1/en active Pending
-
1981
- 1981-11-05 ES ES506865A patent/ES506865A0/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0551566A1 (en) * | 1991-12-25 | 1993-07-21 | SHINKO KOSEN KOGYO KABUSHIKI KAISHA also known as SHINKO WIRE CO.LTD. | Color-developing plated metal for spring and the method of using the same |
| WO2010085827A1 (en) * | 2009-01-27 | 2010-08-05 | Andritz Hydro Gmbh | Apparatus and method for producing workpieces having a surface made of rust-proof metal |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3039731A1 (en) | 1981-09-24 |
| ES8202372A1 (en) | 1982-01-16 |
| ES8206663A1 (en) | 1982-08-16 |
| ES506865A0 (en) | 1982-08-16 |
| IT8020536A0 (en) | 1980-03-12 |
| IT1129633B (en) | 1986-06-11 |
| GB2076432A (en) | 1981-12-02 |
| ES496290A0 (en) | 1982-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2584449C (en) | Hot-dip coating method in a zinc bath for strips of iron/carbon/manganese steel | |
| CH661287A5 (en) | PROCESS FOR THE PREPARATION BY DIFFUSION OF A PROTECTIVE LAYER ON ALLOYS BASED ON NICKEL, COBALT AND IRON. | |
| FR2474533A1 (en) | HEAT-RESISTANT MECHANICAL PIECE AND PROCESS FOR PREPARING THE SAME | |
| FR2499593A1 (en) | PROCESS FOR MAKING PROTECTIVE OXIDE LAYERS | |
| EP0501874B1 (en) | Procedure for the manufacturing of a plate composite product, stainless armour and an armoured reservoir obtained by that procedure | |
| FR2675415A1 (en) | STAINLESS STEEL PLATED SHEET AND PROCESS FOR PRODUCING THE SAME. | |
| KR20040101267A (en) | Heat-resistant material Ti alloy material excellent in resistance to corrosion at high temperature and to oxidation | |
| FR2478131A1 (en) | PROCESS FOR MAKING STEEL RESISTANT TO CORROSION AND PRODUCTS OBTAINED | |
| US4775602A (en) | Metallic coating of improved life | |
| FR2508495A1 (en) | PROCESS FOR SURFACE TREATMENT OF HIGHLY ALLOY NICKEL STEEL BY NICKELING AND CHROMATATION | |
| US20020092586A1 (en) | Corrosion resistant coating system and method | |
| FR2470061A1 (en) | STEEL SHEETS FOR THE MANUFACTURE OF SOLDERED CONTAINER BOXES AND LAYERS | |
| US8309178B2 (en) | Corrosion resistant coating for steel | |
| JP2004197149A (en) | Metal dusting metal material with excellent high temperature strength | |
| EP0037143B1 (en) | Hot dip coating process | |
| FR2524005A1 (en) | METHOD FOR COATING A SUBSTRATE FORMED OF A THERMO-RESISTANT ALLOY | |
| Wu et al. | Corrosion Behavior of FeCr13Alx Alloys in Static Lead-Bismuth Eutectic (LBE) at 500° C under Saturated/Poor Oxygen Concentrations | |
| Hordych et al. | Effect of Pre‐Rolling Heat Treatments on the Bond Strength of Cladded Galvanized Steels in a Cold Roll Bonding Process | |
| FR2626010A1 (en) | Steel sheet coated with zinc alloy and process for its manufacture | |
| EP0310560A2 (en) | Process for low-temperature coating with a hard layer, and products obtained by this process | |
| US1043579A (en) | Chemical vessel. | |
| FR2758571A1 (en) | Steel sheet coated with double layer of aluminium@ alloys | |
| CN117488227B (en) | Zinc-based coated steel plate | |
| JPH07103351A (en) | Valve seat of fluid valve including sea water and chloride | |
| EP0289432A1 (en) | Process for forming at the surface of an aluminium alloy a zone rich in aluminium of at least one of the elements nickel, iron, cobalt |