EP3230490A1 - Conduite de traitement optimisée pour le pré-traitement anti-corrosion du métal sur la base de bains riches en fluorure - Google Patents
Conduite de traitement optimisée pour le pré-traitement anti-corrosion du métal sur la base de bains riches en fluorureInfo
- Publication number
- EP3230490A1 EP3230490A1 EP15804502.1A EP15804502A EP3230490A1 EP 3230490 A1 EP3230490 A1 EP 3230490A1 EP 15804502 A EP15804502 A EP 15804502A EP 3230490 A1 EP3230490 A1 EP 3230490A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- titanium
- mmol
- water
- pretreatment solution
- soluble compounds
- 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.)
- Withdrawn
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 title claims description 12
- 239000002184 metal Substances 0.000 title claims description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000010936 titanium Substances 0.000 claims abstract description 81
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 80
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 80
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 79
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 67
- 150000001875 compounds Chemical class 0.000 claims abstract description 56
- 239000011701 zinc Substances 0.000 claims abstract description 46
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 34
- -1 fluoride ions Chemical class 0.000 claims abstract description 21
- 239000011737 fluorine Substances 0.000 claims abstract description 19
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 19
- 230000000153 supplemental effect Effects 0.000 claims abstract description 9
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract 9
- 239000000243 solution Substances 0.000 claims description 145
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 230000007797 corrosion Effects 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000004070 electrodeposition Methods 0.000 claims description 5
- 239000012487 rinsing solution Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 4
- 238000002161 passivation Methods 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005554 pickling Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000002203 pretreatment Methods 0.000 description 11
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000011247 coating layer Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000002987 primer (paints) Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000004876 x-ray fluorescence Methods 0.000 description 2
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000897276 Termes Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Inorganic materials [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical class [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-O oxonium Chemical compound [OH3+] XLYOFNOQVPJJNP-UHFFFAOYSA-O 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- XJUNLJFOHNHSAR-UHFFFAOYSA-J zirconium(4+);dicarbonate Chemical compound [Zr+4].[O-]C([O-])=O.[O-]C([O-])=O XJUNLJFOHNHSAR-UHFFFAOYSA-J 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
- 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
- C23C22/34—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 containing fluorides or complex fluorides
-
- 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
- C23C22/86—Regeneration of coating baths
Definitions
- the present invention relates to a method for anticorrosive treatment, comprising a series of components with metallic surfaces of iron and / or zinc with a passivated aqueous pretreatment solution in a system tank containing compounds of zirconium and / or titanium and a source of fluoride ions in Contact is brought.
- a passivated aqueous pretreatment solution in a system tank containing compounds of zirconium and / or titanium and a source of fluoride ions in Contact is brought.
- a continuous, precise monitoring of the pretreatment processes is fundamentally crucial for the optimum dosing of the active components and possibly regulating chemicals in the surface treatment of metallic surfaces of components. This effort can only in modern production lines by a largely Automated monitoring and control of process chemicals dosing to maintain a long-lasting, optimal ratio of chemicals in process baths to meet the principles of material efficiency and consistent pre-treatment quality.
- chromium (VI) compounds are finding increasingly less use, long known and established.
- pretreatment solutions contain additional active components which are intended to further improve the anticorrosive action and paint adhesion.
- EP 1 571 237 is cited, which is a
- Pretreatment solution suitable for different metal surfaces containing up to 5000 ppm zirconium and / or titanium and up to 100 ppm free fluoride disclosed.
- the solution may contain further components selected from chlorate, bromate, nitrite, nitrate, permanganate, vanadate, hydrogen peroxide, tungstate, molybdate or in each case the associated acids.
- Organic polymers may also be present.
- a pretreatment bath for producing a passivating conversion layer on metal surfaces therefore requires in individual cases a large number of active components which have to be regularly replenished during operation of a pretreatment bath. In order to achieve the highest possible material efficiency, there is a constant need for the
- Pre-treatment process resource-saving, i. operate under conditions in which the use of active components can be reduced.
- DE 10 2008 038653 discloses in this connection a method in which the active components which have been entrained into the sink with the component are cascaded back into the rinsing water before the actual pretreatment to produce a zirconium and / or titanium-based conversion layer.
- the proportion of cascaded active components causes a partial passivation, which is completed in the subsequent pretreatment.
- DE 10 2008 014465 reports, with regard to the corrosion protection treatment of metallic components by means of pretreatment solutions of fluorometalates of the elements zirconium and / or titanium, that the observance of an optimum molar ratio of fluoride ions to elements of the elements zirconium and / or titanium in serial
- the fluoride scavengers are regulatory chemicals and in the specific case are preferably selected from compounds which release aluminum ions, calcium ions and / or iron ions.
- the fluoride scavengers are regulatory chemicals and in the specific case are preferably selected from compounds which release aluminum ions, calcium ions and / or iron ions.
- Treatment time of the metallic component may be.
- Pretreatment solutions of fluorometalates of the elements zirconium and / or titanium can therefore only be ensured with a high level of analytical and process engineering effort, and last but not least, the use of considerable quantities of regulating chemicals.
- the object of the present invention is thus, in the serial
- a further object was to optimize the process so that a reliable corrosion-protective conversion based on the zirconium and / or titanium elements takes place, in particular, on the iron surfaces of the components treated in series, which are then used in conjunction with an organic primer coating or an organic primer coating Dip the high
- This object is achieved by a method for corrosion protection treatment of a plurality of metallic surfaces of zinc and / or iron-containing components in series, in which each of these components with one located in a system tank
- the passivating aqueous pretreatment solution comprises one or more water-soluble compounds of the elements zirconium and / or titanium and one or more water-soluble compounds which are a source of fluoride ions, and contacting for such a time that on the metallic surfaces of zinc and / or iron results in a layer of at least 0, 1 mmol / m 2 based on the elements zirconium and / or titanium, but none of these metallic surfaces has a layer coverage of more than 0.7 mmol / m 2 based on the elements zirconium and / or titanium, and wherein during the
- Corrosion protection treatment of the components in series a part of the passivating aqueous pretreatment solution of the system tank is discarded and replaced by a sum of at least equal volume of one or more supplemental solutions by metering into the system tank in a manner that maintaining the concentration of the elements zirconium and / or Titanium in the passivating aqueous pretreatment solution in the form of water-soluble compounds, further characterized in that a concentration of zirconium and / or titanium in the passivating aqueous pretreatment solution in the form of water-soluble compounds of at least 0.05 mmol / L, but less than 0 in total , 8 mmol / L is maintained in the system tank, and the molar ratio of the total amount of fluorine in the form of water-soluble compounds, which are a source of fluoride ions (hereinafter "total amount of fluorine”), to the total amount of elements Z irconium and / or titanium in the form of water-soluble compounds (hereinafter "total
- VW Ze ⁇ 2 ' 4 ,, 10 1 mmol m 2 (1)
- VW throw on pretreatment solution in L / m 2 ;
- the inventive method has the effect that the regulated Versch the free fluoride content in the pretreatment solution does not exceed values for which there is already a structural change of the conversion layer, which regularly with a
- the throw of pretreatment solution for achieving the same purpose takes at least the following value:
- VW 3 (Z f ⁇ 2 ' 4) 1 (T 1 mmol irr 2 , (T)
- the throw is the liquid volume of pretreatment solution normalized to the unit surface (1 m 2 ) of the components to be treated which leaves the system tank during the serial pretreatment by passive extraction or due to a continuous or discontinuous overflow per square meter of a treated component.
- a pre-treatment in series according to the present invention is when a plurality of components is brought into contact with the pre-treatment solution in the system tank, whereby the individual components are brought into contact one after the other and thus separated in time.
- the system tank is the container in which the pretreatment solution is in series for the purpose of passivating pretreatment.
- the area to be set in the method according to the invention for the layer support based on the elements Zr and / or Ti can be determined by means of X-ray fluorescence analysis (RFA) after calibration on the basis of solutions of known molarity of H ZrFö and F TiFö in the dry-in-place method coated metal surfaces.
- the solutions of known molarity are applied to produce the calibration sample plates in a defined wet film thickness and the wet film is then completely dried.
- the determination of the actual layer support according to the present invention can be based on this
- Solubility in deionized water having a conductivity of not more than 1 Sc a temperature of 20 ° C is at least 1 g / l.
- Total amount of fluorine to the total amount of the elements zirconium and / or titanium in the added total volume of the replenisher is therefore not less than 5.0, more preferably not less than 5.5.
- selbiges ratio in the total volume of the added dose replenishers smaller in the inventive method as a ⁇ '4 "1" 1 L + 6, or alternatively, less than 9.25 is
- the inventive method makes due to the controlled Versches
- the minimum throw is for the given conditions with respect to the concentration of active components in the pretreatment solution and the planned coating layer of a maximum of 0.7 mmol / m 2 based on the elements zirconium and titanium according to the semi-empirically found term (1) or the preferred semi adjust -empirischen Terme (V) and (1 ").
- These terms for the technicianvermine are only of the specific concentration of zirconium and / or titanium in the pretreatment solution and the ratio of the elements fluorine in the form of dissolved in water compounds to the total amount of zirconium and / or titanium in the form of compounds dissolved in water in the supplement solution.
- Conversion layer training is regularly check.
- the monitoring of the amount of free fluoride in the pretreatment solution becomes unnecessary in the process according to the invention.
- Pretreatment solution can be dispensed with, their proportion in accordance with the inventionopteddos faced volume of the supplementary solution for reasons of material efficiency is low.
- processes according to the invention are preferably processes for which the molar ratio of the total amount of the elements zirconium and / or titanium in each case to the total amount of one of the elements calcium, magnesium, aluminum, boron, iron, manganese or tungsten in the form of water-soluble compounds in the added total volume of the supplementary solution is greater is 5: 1, more preferably greater than 10: 1.
- a further advantage of the method according to the invention is that sufficient coating deposits of zirconium and / or titanium are already achieved with relatively low concentrations of active components for corrosion protection and adhesion to a subsequently applied organic primer.
- those methods according to the invention are preferred for material efficiency in which the passivating aqueous pretreatment solution in the system tank is less than 0.65 mmol / L, more preferably less than 0.55 mmol / L, most preferably less than 0.325 mmol / L of water-soluble compounds of the elements zirconium and / or titanium.
- a low concentration of active components also causes the stationary by being carried over into a downstream sink introduced proportion of these compounds is low.
- passivating aqueous pretreatment solution is not greater than the following value in liters per massively treated square meter of metallic component:
- VW throw on pretreatment solution in order 2 ;
- C SS 6 concentration of zirconium and / or titanium in the pretreatment solution in mmol / L;
- the pH of the passivating aqueous pretreatment solution in a preferred process according to the invention is not less than 3.0, more preferably not less than 3.5, but preferably not greater than 5.0, more preferably not greater than 4.5.
- the “pH value” according to the present invention corresponds to the negative logarithm of the hydronium ion activity at 20 ° C. and can be determined by means of a pH-sensitive glass electrode.
- the process of the invention is preferably at relatively low
- the temperature of the passivating aqueous pretreatment solution is not greater than 45 ° C, more preferably not greater than 40 ° C, most preferably not greater than 35 ° C.
- the Versch provided in pretreatment solution according to the invention can be carried out during the corrosion protection treatment of the plurality of components process-related only quasi-continuous or discontinuous.
- the inventive process of the series treatment requires that with each treated component a certain amount of pretreatment solution irrevocably leaves the system tank.
- the amount of rejects entrained with each treated component is inherently discrete and therefore discontinuous and dependent on the specific treatment conditions and the geometry of the components.
- the dragged portion of Versch is only partially accessible to a scheme, for example, by rotation or tilting of the components in the
- the rejection of the passivating aqueous pretreatment solution preferably takes place both by extracting the pretreatment solution with each component of the series of components to be treated and by actively discharging
- Pretreatment solution in each case from the system tank of pretreatment.
- Pretreatment solution to the deposited in the pretreatment step on the components layer support with respect to the elements zirconium and / or titanium adjusted to redesignspeisen for a desired coating layer of zirconium and / or titanium as much as necessary, but not more than necessary to pretreatment solution and on to do this as economically as possible.
- discontinuous operation such methods are preferred in which the discontinuous Versch VWd is carried out on passivating aqueous pretreatment solution after pretreatment of a certain number n of components i, wherein the
- discontinuous throw at least the following value in liters for a series treated number n of components i assumes:
- VW d discontinuous throw in liters
- VW a n Rejected by removal by n components in liters with the proviso that
- xp 5 proportion of iron surface area relative to the total surface area of zinc and iron of the ith series-treated component
- A total area of metallic surfaces of zinc and iron of the ith series-treated component
- n positive natural number ⁇ n e N n> 1 ⁇
- Total amount of elements zirconium and / or titanium in the supplementary solution satisfies the following condition:
- the throwing by active feeding of passivating aqueous pretreatment solution and the replacement of discarded pretreatment solution with replenisher are carried out continuously during the pretreatment of the components in series, more preferably by feeding a constant volume flow of replenishing replacer solution into the system tank of the pretreatment, wherein the continuous Versch at passivating aqueous pretreatment solution is preferably realized mainly by overflowing an open system tank.
- Predominantly in this context means that more than 50%, preferably more than 80%, of the control accessible portion of the discarded pretreatment solution is not the inevitable part due to the scavenging effect of the components or the wet film adhered to the components
- the overflow is thus a particularly preferred type of Ver Dahles by active Ausspeisen.
- the overflow can be removed by an overflow from the system tank
- continuous Versch also be realized by feeding a constant volume flow from the system tank.
- the continuous throw assumes at least the following value in liters per square meter of metallic surfaces of zinc and iron treated in order to obtain as much as required, but not more than, 20,000 for a coating of zirconium and / or titanium to be achieved necessary
- x average proportion of iron surfaces in relation to the total surface area of zinc and iron of a series of treated components
- Preferred upper limits for the continuously discharged pretreatment solution are processes according to the invention in which the continuous throw in liters per per square meter of metallic surfaces of zinc and iron treated in series has the value
- VW C ⁇ - (x S + x S) A - VW a (6)
- Total amount of elements zirconium and / or titanium in the supplementary solution satisfies the following condition:
- ) with knowledge of the bath concentration of zirconium and / or titanium is sufficient to specify on the setting of the continuous or discontinuous Versches the target state with respect to layer support for other components and an optimally protected against corrosion Lackhaftground.
- an effective scheme that only monitoring the amount of zirconium and / or titanium in the
- ) based on the elements zirconium and / or titanium can be determined immediately after the pretreatment of the component by means of X-ray fluorescence analysis on the respective treated metal surface as described above.
- the discontinuous Versch is carried out immediately after the first rinse, wherein the first sink preferably by means of a
- wet holding ring is made by spraying the components with the first rinse water, wherein the rinse water is again preferably at least partially fed as part of the supplement solution in the pretreatment solution.
- Pretreatment solution on the regulation of Verdeses based on the layer support can be made almost immediately.
- the Versch occurs quasi-continuously or if possible discontinuously as possible after each pretreatment of only a small number n of components.
- VW C Ze ⁇ 2 ' 4 ,, O / lmmoIrrT 2 - ⁇ - VW a (5 ' )
- VW C • 0.7 mmolm ⁇ 2 ⁇ A - VW a (5 "' )
- VW C , VWd discontinuous or continuous Ver Dahles
- At least 80% of the surfaces of the component will be formed by surfaces of the substrates iron, zinc and aluminum, more preferably at least 50% of the surfaces of the component being metallic surfaces of the substrates iron and / or zinc, again preferably at least 10%, particularly preferably at least 20%, of the metallic surfaces of the component are selected from surfaces of the substrate iron.
- the surfaces of the substrates iron, zinc and aluminum are also their
- the process of the invention may be further process steps for
- Binder system preferably a powder coating or dip coating, more preferably an electrocoating, particularly preferably a cathodic electrodeposition coating.
- an electrocoating particularly preferably a cathodic electrodeposition coating.
- subsequent dip coating in particular a subsequent electrocoating, takes place after contacting with the passivating aqueous pretreatment solution and before dip coating
- a drying step is characterized by performing technical measures for drying the surfaces of the component, for example, by supplying thermal energy or by supplying a dry air flow.
- Metal surface of the component to form a coating containing substrate-foreign metallic or semi-metallic elements with a layer support of more than 0.1 mmol / m 2 based on these substrate-foreign elements.
- Pretreatment Solution is any element that is not the main alloying element of the substrate in question.
- a rinsing step is carried out by bringing the components into contact with a system tank
- Rinsing solution wherein during the anticorrosive treatment of the components in series part of the rinse solution discarded and replaced by an at least equal volume of a supplementary rinse solution, the total less than 10 "5 mol / L on
- water-soluble compounds of the elements zirconium and / or titanium and preferably less than 10.sup.- 4 mol / l of water-soluble compounds which are a source of fluoride ions, based on the element fluorine Active components from the passivating aqueous pretreatment solution in the rinse solution is tolerated only to a certain extent, since otherwise damage to the passive layer can not be completely ruled out.
- the throw of rinsing solution per treated in series total surface area of the components is less than 2 liters / m 2 .
- this upper limit can always be maintained without additional measures for working up the
- Rinsing solution would be necessary. It is further preferred if at least a portion of the discarded rinsing solution is fed as a replenisher into the system tank of the passing aqueous pretreatment, wherein regularly additionally the dosage of a concentrated
- the water-soluble compounds of the elements zirconium and / or titanium are therefore not restricted to any particular class of compounds both in the pretreatment solution and in the supplemental solutions, but preferred are oxyfluorides of the respective elements, particularly preferably the fluoroacids and salts thereof.
- oxyfluorides of the respective elements particularly preferably the fluoroacids and salts thereof.
- basic zirconium carbonate or titanyl sulfate these compounds then having to be reacted with a corresponding amount of fluoride-releasing compounds because of the ratio of fluorides dissolved in water according to the invention to compounds of zirconium and / or titanium dissolved in water in order to form an adequate supplementary solution.
- Water-soluble compounds which are a source of fluoride ions and to which extent the process according to the invention can be based are, for example, hydrofluoric acid, ammonium bifluoride and sodium fluoride or the abovementioned oxyfluorides and fluoro acids of the elements zirconium and / or titanium.
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14197667.0A EP3031951B1 (fr) | 2014-12-12 | 2014-12-12 | Traitement optimisé dans le pré-traitement du métal contre la corrosion à base de bains contenant du fluorure |
| PCT/EP2015/078511 WO2016091713A1 (fr) | 2014-12-12 | 2015-12-03 | Conduite de traitement optimisée pour le pré-traitement anti-corrosion du métal sur la base de bains riches en fluorure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3230490A1 true EP3230490A1 (fr) | 2017-10-18 |
Family
ID=52021123
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14197667.0A Active EP3031951B1 (fr) | 2014-12-12 | 2014-12-12 | Traitement optimisé dans le pré-traitement du métal contre la corrosion à base de bains contenant du fluorure |
| EP15804502.1A Withdrawn EP3230490A1 (fr) | 2014-12-12 | 2015-12-03 | Conduite de traitement optimisée pour le pré-traitement anti-corrosion du métal sur la base de bains riches en fluorure |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14197667.0A Active EP3031951B1 (fr) | 2014-12-12 | 2014-12-12 | Traitement optimisé dans le pré-traitement du métal contre la corrosion à base de bains contenant du fluorure |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US10458022B2 (fr) |
| EP (2) | EP3031951B1 (fr) |
| JP (1) | JP6720175B2 (fr) |
| KR (1) | KR102504477B1 (fr) |
| CN (1) | CN107002245B (fr) |
| BR (1) | BR112017012144B1 (fr) |
| CA (1) | CA2970405A1 (fr) |
| ES (1) | ES2654893T3 (fr) |
| HU (1) | HUE036114T2 (fr) |
| MX (1) | MX375812B (fr) |
| PL (1) | PL3031951T3 (fr) |
| TW (1) | TWI678434B (fr) |
| WO (1) | WO2016091713A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110129783A (zh) * | 2019-04-15 | 2019-08-16 | 汉腾汽车有限公司 | 一种涂装前处理工艺 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US587392A (en) * | 1897-08-03 | Metal arch for culverts | ||
| US3515600A (en) * | 1966-10-19 | 1970-06-02 | Hooker Chemical Corp | Metal treating process and composition |
| JP3349851B2 (ja) * | 1994-12-22 | 2002-11-25 | 日本パーカライジング株式会社 | スラッジ抑制性に優れたアルミニウム含有金属材料用表面処理組成物および表面処理方法 |
| US5873952A (en) * | 1996-08-20 | 1999-02-23 | Henkel Corporaiton | Process for forming a protective coating on zinciferous metal surfaces |
| US6720032B1 (en) * | 1997-09-10 | 2004-04-13 | Henkel Kommanditgesellschaft Auf Aktien | Pretreatment before painting of composite metal structures containing aluminum portions |
| JP4408474B2 (ja) * | 1999-01-25 | 2010-02-03 | トピー工業株式会社 | アルミニウム合金基材の塗装方法及びホイール |
| JP2003155578A (ja) * | 2001-11-20 | 2003-05-30 | Toyota Motor Corp | 鉄及び/又は亜鉛系基材用化成処理剤 |
| JP2004018865A (ja) * | 2002-06-12 | 2004-01-22 | Nissan Motor Co Ltd | 塗装前処理装置及び塗装前処理方法 |
| JP4205939B2 (ja) | 2002-12-13 | 2009-01-07 | 日本パーカライジング株式会社 | 金属の表面処理方法 |
| JP2008184690A (ja) * | 2002-12-24 | 2008-08-14 | Nippon Paint Co Ltd | 塗装前処理方法 |
| ES2316706T3 (es) * | 2002-12-24 | 2009-04-16 | Chemetall Gmbh | Metodo de pre-tratamiento para revestir. |
| JP2005344186A (ja) * | 2004-06-04 | 2005-12-15 | Nippon Paint Co Ltd | 金属の化成処理方法 |
| JP2006161067A (ja) * | 2004-12-02 | 2006-06-22 | Nippon Paint Co Ltd | 自動車用燃料タンク又は給油管 |
| JP2006219691A (ja) * | 2005-02-08 | 2006-08-24 | Nippon Parkerizing Co Ltd | 金属表面処理方法 |
| DE102008014465B4 (de) | 2008-03-17 | 2010-05-12 | Henkel Ag & Co. Kgaa | Mittel zur optimierten Passivierung auf Ti-/Zr-Basis für Metalloberflächen und Verfahren zur Konversionsbehandlung |
| DE102008038653A1 (de) | 2008-08-12 | 2010-03-25 | Henkel Ag & Co. Kgaa | Sukzessive korrosionsschützende Vorbehandlung von Metalloberflächen in einem Mehrstufenprozess |
| US8951362B2 (en) * | 2009-10-08 | 2015-02-10 | Ppg Industries Ohio, Inc. | Replenishing compositions and methods of replenishing pretreatment compositions |
| DE102009047522A1 (de) * | 2009-12-04 | 2011-06-09 | Henkel Ag & Co. Kgaa | Mehrstufiges Vorbehandlungsverfahren für metallische Bauteile mit Zink- und Eisenoberflächen |
| HUE027975T2 (en) * | 2012-02-23 | 2016-11-28 | Ppg Ind Ohio Inc | Replenishing compositions and methods of replenishing pretreatment compositions |
| EP3006600B1 (fr) * | 2013-05-28 | 2018-12-19 | Nihon Parkerizing Co., Ltd. | Supplément et procédé de production d'un matériau métallique traité en surface |
-
2014
- 2014-12-12 HU HUE14197667A patent/HUE036114T2/hu unknown
- 2014-12-12 PL PL14197667T patent/PL3031951T3/pl unknown
- 2014-12-12 ES ES14197667.0T patent/ES2654893T3/es active Active
- 2014-12-12 EP EP14197667.0A patent/EP3031951B1/fr active Active
-
2015
- 2015-12-03 BR BR112017012144-1A patent/BR112017012144B1/pt not_active IP Right Cessation
- 2015-12-03 WO PCT/EP2015/078511 patent/WO2016091713A1/fr not_active Ceased
- 2015-12-03 MX MX2017007556A patent/MX375812B/es active IP Right Grant
- 2015-12-03 KR KR1020177015761A patent/KR102504477B1/ko active Active
- 2015-12-03 CN CN201580067239.3A patent/CN107002245B/zh active Active
- 2015-12-03 JP JP2017531332A patent/JP6720175B2/ja active Active
- 2015-12-03 EP EP15804502.1A patent/EP3230490A1/fr not_active Withdrawn
- 2015-12-03 CA CA2970405A patent/CA2970405A1/fr not_active Abandoned
- 2015-12-09 TW TW104141238A patent/TWI678434B/zh not_active IP Right Cessation
-
2017
- 2017-06-09 US US15/618,229 patent/US10458022B2/en active Active
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2016091713A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2970405A1 (fr) | 2016-06-16 |
| EP3031951A1 (fr) | 2016-06-15 |
| JP2017537229A (ja) | 2017-12-14 |
| BR112017012144A2 (pt) | 2018-01-02 |
| HUE036114T2 (hu) | 2018-06-28 |
| US10458022B2 (en) | 2019-10-29 |
| TW201631212A (zh) | 2016-09-01 |
| TWI678434B (zh) | 2019-12-01 |
| JP6720175B2 (ja) | 2020-07-08 |
| US20170283955A1 (en) | 2017-10-05 |
| ES2654893T3 (es) | 2018-02-15 |
| MX375812B (es) | 2025-03-07 |
| CN107002245B (zh) | 2019-04-09 |
| WO2016091713A1 (fr) | 2016-06-16 |
| KR102504477B1 (ko) | 2023-02-28 |
| MX2017007556A (es) | 2017-10-31 |
| EP3031951B1 (fr) | 2017-10-04 |
| KR20170110575A (ko) | 2017-10-11 |
| PL3031951T3 (pl) | 2018-03-30 |
| CN107002245A (zh) | 2017-08-01 |
| BR112017012144B1 (pt) | 2021-06-22 |
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