EP0214571B1 - Verfahren zur Erzeugung von Konversionsschichten auf Zink und/oder Zinklegierungen - Google Patents
Verfahren zur Erzeugung von Konversionsschichten auf Zink und/oder Zinklegierungen Download PDFInfo
- Publication number
- EP0214571B1 EP0214571B1 EP86111976A EP86111976A EP0214571B1 EP 0214571 B1 EP0214571 B1 EP 0214571B1 EP 86111976 A EP86111976 A EP 86111976A EP 86111976 A EP86111976 A EP 86111976A EP 0214571 B1 EP0214571 B1 EP 0214571B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solution
- zinc
- chromium
- contact
- chromating
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 13
- 239000011701 zinc Substances 0.000 title claims description 13
- 229910052725 zinc Inorganic materials 0.000 title claims description 13
- 230000008569 process Effects 0.000 title claims description 11
- 229910001297 Zn alloy Inorganic materials 0.000 title claims description 6
- 238000006243 chemical reaction Methods 0.000 title description 19
- 238000004532 chromating Methods 0.000 claims description 36
- 239000011651 chromium Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 10
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 10
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- 239000010452 phosphate Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 229910001430 chromium ion Inorganic materials 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 2
- 235000012239 silicon dioxide Nutrition 0.000 claims 2
- 238000007739 conversion coating Methods 0.000 claims 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 13
- 229910052804 chromium Inorganic materials 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 230000007797 corrosion Effects 0.000 description 12
- 239000003973 paint Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000008237 rinsing water Substances 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- LRBQNJMCXXYXIU-QWKBTXIPSA-N gallotannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@H]2[C@@H]([C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-QWKBTXIPSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C23C22/37—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 containing also hexavalent chromium compounds
- C23C22/38—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 containing also hexavalent chromium compounds containing also phosphates
Definitions
- the invention relates to a var procedure for producing conversion layers on surfaces made of zinc or zinc alloys by means of aqueous acidic chromating solutions which contain chromium VI, chromium III and phosphate.
- drying processes i.e. Processes in which the chromating solution is dried without rinsing water at ambient temperature or in particular at an elevated temperature are becoming increasingly important.
- the advantage of such methods is, in particular, that no rinsing water is produced and that the conversion layers obtained in this way impart excellent corrosion resistance.
- Another advantage is that the treatment solutions e.g. by adding zinc or reducing chromium VI to chromium III less than those in which the conversion layer is in constant contact with the solution.
- the object of the invention is to provide a method for producing conversion layers on surfaces made of zinc or zinc alloys, the chromating solution of which has a longer service life, which leads to excellent conversion layers with regard to corrosion protection and adhesion promotion for a possibly subsequently applied lacquer and which is nevertheless simple to carry out .
- the method is suitable for the treatment of workpieces coated with solid zinc or solid zinc alloys, e.g. galvanized steel sheet or strip.
- chromic acid is introduced as such in the simplest way.
- the chromium-III ions can be added using suitable salts, but particularly advantageously by reducing chromium-VI using e.g. Oxalic acid, tannic acid, starch, alcohol, hydrazine or citric acid can be added.
- the phosphate content can be adjusted by adding phosphoric acid, ammonium phosphate and the like.
- the fluorozirconate content can be measured by adding ammonium hexafluorozirconate or the free acid.
- the concentrations of the active constituents of the chromating solution are critical insofar as the conversion layers produced do not have the required quality at a chromic acid concentration below 10 g / l, and at a concentration above 100 g / l the paint adhesion decreases due to an excessively high layer weight. In the case of chromium concentrations below 1 g / 1, the corrosion protection in particular decreases. It should also be noted that only certain varnishes can then be applied, i.e. the otherwise universal type of painting is partially lost. At concentrations above 21 g / 1, it is difficult to avoid the formation of precipitates in the chromating solution.
- the phosphate. that is built into the conversion layer is responsible in particular for the uniform appearance of the conversion layer and the excellent adhesion for a subsequently applied lacquer. If its concentration is below 0.1 g / l, the aforementioned effects are only present to a small extent. At concentrations above 4 g / l, the proportion of phosphate in the conversion layer increases sharply, which is associated with reduced corrosion resistance. The fluorozirconate ion intensifies the pickling attack on the zinc surface. Its ability to complexly bind metal ions is likely to be decisive for increasing the service life of the chromating solution or for its ability to form conversion layers of excellent quality over a longer period of time.
- the chromium VI chromium III weight ratio also determines the uniformity of the conversion layers produced, but is also responsible for the long service life of the chromating solution and the universal type of coating. When leaving the area, these advantages no longer exist. Even the weight ratios of chrome Acid: fluorozirconate and phosphate: fluorozirconate are critical insofar as the favorable results with regard to corrosion resistance, adhesion promotion and universal paintability are lost when the design rule is left.
- the metal surface is brought into contact with a chromating solution in which the weight ratio of chromic acid: fluorozirconate is set to (10 to 40): 1.
- the corrosion resistance and the adhesion promotion of the conversion layer produced by the method according to the invention can be further improved if, according to a preferred embodiment of the invention, the surface is brought into contact with a chromating solution which additionally contains 0.1 to 200 g / l of silicate or silica. With lower contents, the improvement achieved is only very slight, with higher contents, the layer weight increases considerably, which reduces the paint adhesion. The best results are achieved if, according to a further advantageous embodiment of the invention, the metal surface is brought into contact with a chromating solution in which the weight ratio of chromic acid: silica is set to (10 to 0.5): 1.
- the chromating solution is usually used at a temperature that ranges from ambient to 50 ° C.
- the contact with the surface consisting of zinc or a zinc alloy is best done by roller application, spraying or dipping. Any excess chromating solution should be removed as soon as possible, for example using pinch rollers. In this way, it can be achieved in a particularly simple manner that a specific and constant layer weight results.
- a particularly favorable embodiment of the invention provides for the metal surface to be brought into contact with the phosphating solution in such a way that, after drying, a layer weight of 10 to 200 mg / m 2 , preferably 15 to 100 mg / m 2 (calculated as Cr) , results.
- Excess chromating solution removed using squeeze rollers can be returned to the treatment bath and thereby reused.
- drying is carried out without intermediate rinsing. This can be done at ambient temperature or at elevated temperature, e.g. in a convection oven.
- the service life of the chromating solution is practically unlimited and the conversion layers produced are of excellent quality.
- meaningful means, within the usual process sequence, degreasing / cleaning, rinsing water, applying the chromating solution and drying by thorough rinsing to ensure that as little contamination as possible gets into the chromating solution.
- a certain enrichment, particularly of zinc ions cannot be avoided, an excess can be removed by known ion exchange processes.
- Oiled sheets of hot-dip galvanized steel were treated after the process step alkaline degreasing, water rinsing, squeezing with rollers, roller application of the chromating solution at room temperature and drying.
- the compositions of the chromating solutions used for this are given in Table 1 below.
- the layer weights produced with all chromating solutions were 20 to 25 mglm 2 (calculated as Cr).
- the coating is first scratched with a cutter at a distance of 1 mm to the metal surface, so that a grid with several scratch marks lying at an angle of 90 ° is created.
- the test sheet is first dented slowly by pressing in a ball until a bulge with a height of 7 mm is created.
- a falling body with a weight of 1 kg and a punch diameter of 12.7 mm is dropped on the test sheet from a height of 30 cm. The top and back of the deformed area are evaluated.
Landscapes
- 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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP194940/85 | 1985-09-05 | ||
| JP60194940A JPS6256580A (ja) | 1985-09-05 | 1985-09-05 | 亜鉛系メツキ鋼板のクロメ−ト塗布液 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0214571A1 EP0214571A1 (de) | 1987-03-18 |
| EP0214571B1 true EP0214571B1 (de) | 1989-01-18 |
Family
ID=16332863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86111976A Expired EP0214571B1 (de) | 1985-09-05 | 1986-08-29 | Verfahren zur Erzeugung von Konversionsschichten auf Zink und/oder Zinklegierungen |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4749418A (enrdf_load_stackoverflow) |
| EP (1) | EP0214571B1 (enrdf_load_stackoverflow) |
| JP (1) | JPS6256580A (enrdf_load_stackoverflow) |
| AU (1) | AU584454B2 (enrdf_load_stackoverflow) |
| CA (1) | CA1274156A (enrdf_load_stackoverflow) |
| DE (2) | DE3629382A1 (enrdf_load_stackoverflow) |
| GB (1) | GB2180263B (enrdf_load_stackoverflow) |
| NZ (1) | NZ217245A (enrdf_load_stackoverflow) |
| ZA (1) | ZA866712B (enrdf_load_stackoverflow) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6352338A (ja) * | 1987-05-29 | 1988-03-05 | Mitsubishi Electric Corp | ディスク再生装置 |
| GB2215740B (en) * | 1988-02-08 | 1992-06-03 | Brent Chemicals Int | Composition and process for treating metal surfaces |
| JPH01249331A (ja) * | 1988-03-31 | 1989-10-04 | Toyo Kohan Co Ltd | 加工性に優れたポリエステル樹脂被覆金属板の製造方法 |
| JPH0735587B2 (ja) * | 1988-06-30 | 1995-04-19 | 日本鋼管株式会社 | 高耐食性表面処理鋼板の製造方法 |
| JPH0230771A (ja) * | 1988-07-19 | 1990-02-01 | Nkk Corp | 高耐食性表面処理鋼板の製造方法 |
| JPH02243772A (ja) * | 1989-03-17 | 1990-09-27 | Nisshin Steel Co Ltd | 亜鉛めっき鋼板の高耐食クロメート処理液および処理方法 |
| JP2879344B2 (ja) * | 1989-04-07 | 1999-04-05 | 富山化学工業株式会社 | ３―ホルミルアミノ―７―メチルスルホニルアミノ―６―フェノキシ―４ｈ―１―ベンゾピラン―４―オンまたはその塩を含有する抗炎症製剤 |
| JPH0753911B2 (ja) * | 1989-04-07 | 1995-06-07 | 日本パーカライジング株式会社 | 亜鉛系めっき鋼板のクロメート処理方法 |
| JPH07100873B2 (ja) * | 1989-09-27 | 1995-11-01 | 日本パーカライジング株式会社 | 亜鉛系メッキ鋼板のクロメート塗布液 |
| CA2019861C (en) * | 1990-06-26 | 1995-10-17 | Hiroaki Kawamura | Tin-plated steel sheet with a chromium bilayer and a copolyester resin laminate and method |
| JP2628782B2 (ja) * | 1990-10-08 | 1997-07-09 | 日本パーカライジング株式会社 | 亜鉛系めっき鋼板のクロメート処理方法 |
| LT3218B (en) | 1993-03-27 | 1995-04-25 | Chemijos Inst | Method for coating zinc alloy by chromium plating |
| JP3288152B2 (ja) * | 1993-08-14 | 2002-06-04 | 日本パーカライジング株式会社 | 耐黒変性及び耐白錆性に優れた亜鉛系めっき鋼板の製造方法 |
| JPH09157864A (ja) * | 1995-11-30 | 1997-06-17 | Nippon Parkerizing Co Ltd | 金属材料用クロメート処理液組成物、および処理方法 |
| US6149735A (en) * | 1995-11-30 | 2000-11-21 | Henkel Corporation | Chromate treatment bath composition and process for application to metals |
| DE19615664A1 (de) | 1996-04-19 | 1997-10-23 | Surtec Produkte Und Systeme Fu | Chrom(VI)freie Chromatschicht sowie Verfahren zu ihrer Herstellung |
| US7314671B1 (en) | 1996-04-19 | 2008-01-01 | Surtec International Gmbh | Chromium(VI)-free conversion layer and method for producing it |
| CA2252559C (en) * | 1996-04-26 | 2006-06-06 | Henkel Corporation | Chromate passivating and storage stable concentrate solutions therefor |
| EP1024905B1 (en) * | 1997-08-21 | 2005-10-26 | Henkel Kommanditgesellschaft auf Aktien | Process for coating and/or touching up coatings on metal surfaces |
| DE19740248A1 (de) * | 1997-09-12 | 1999-03-18 | Henkel Kgaa | Chromatierung oder Nachpassivierung mit stabilisierten Cr(III)/Cr(VI)-haltigen Lösungen |
| KR100370472B1 (ko) * | 1998-12-02 | 2003-04-10 | 주식회사 포스코 | 강판의내식성및표면외관을향상시키는3가크롬용액 |
| US6527841B2 (en) * | 2000-10-31 | 2003-03-04 | The United States Of America As Represented By The Secretary Of The Navy | Post-treatment for metal coated substrates |
| US6375726B1 (en) * | 2000-10-31 | 2002-04-23 | The United States Of America As Represented By The Secretary Of The Navy | Corrosion resistant coatings for aluminum and aluminum alloys |
| DE102004032561B3 (de) * | 2004-07-05 | 2006-02-09 | Heraeus Electro-Nite International N.V. | Behälter für Metallschmelze sowie Verwendung des Behälters |
| US20060240191A1 (en) * | 2005-04-21 | 2006-10-26 | The U.S. Of America As Represented By The Secretary Of The Navy | Composition and process for preparing chromium-zirconium coatings on metal substrates |
| KR20110020237A (ko) | 2008-04-25 | 2011-03-02 | 헨켈 아게 운트 코 카게아아 | 아연 도금 강을 처리하기 위한 3가 크롬 부동태화제 |
| US8273190B2 (en) | 2009-05-29 | 2012-09-25 | Bulk Chemicals, Inc. | Method for making and using chromium III salts |
| US20110070429A1 (en) * | 2009-09-18 | 2011-03-24 | Thomas H. Rochester | Corrosion-resistant coating for active metals |
| RU2425911C1 (ru) * | 2010-01-19 | 2011-08-10 | Закрытое акционерное общество "ФК" | Хроматирующий состав для обработки оцинкованной поверхности |
| US8425692B2 (en) | 2010-05-27 | 2013-04-23 | Bulk Chemicals, Inc. | Process and composition for treating metal surfaces |
| US10435806B2 (en) | 2015-10-12 | 2019-10-08 | Prc-Desoto International, Inc. | Methods for electrolytically depositing pretreatment compositions |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE489716A (enrdf_load_stackoverflow) * | 1948-07-12 | 1900-01-01 | ||
| US3076734A (en) * | 1960-07-01 | 1963-02-05 | Acme Steel Co | Protective coatings on metals |
| US3278343A (en) * | 1963-03-12 | 1966-10-11 | Amchem Prod | Conversion coating of magnesium alloy surfaces |
| DE1277646B (de) * | 1963-06-27 | 1968-09-12 | Metallgesellschaft Ag | Verfahren zur Erhoehung des Korrosionswiderstandes von Oberflaechen aus Aluminium und Aluminiumlegierungen |
| US3382111A (en) * | 1965-04-26 | 1968-05-07 | Pennsalt Chemicals Corp | Coating metal |
| US3562011A (en) * | 1968-04-26 | 1971-02-09 | Gen Electric | Insulating coating comprising an aqueous mixture of the reaction product of chromium nitrate and sodium chromate,phosphoric acid and colloidal silica and method of making the same |
| JPS499022B1 (enrdf_load_stackoverflow) * | 1970-12-11 | 1974-03-01 | ||
| JPS6039751B2 (ja) * | 1982-08-12 | 1985-09-07 | 新日本製鐵株式会社 | 亜鉛被覆鋼材のクロメ−ト処理方法 |
| JPS6039169A (ja) * | 1983-08-12 | 1985-02-28 | Nippon Light Metal Co Ltd | 親水性金属表面処理剤 |
-
1985
- 1985-09-05 JP JP60194940A patent/JPS6256580A/ja active Granted
-
1986
- 1986-08-08 US US06/894,595 patent/US4749418A/en not_active Expired - Fee Related
- 1986-08-18 NZ NZ217245A patent/NZ217245A/xx unknown
- 1986-08-25 AU AU61815/86A patent/AU584454B2/en not_active Ceased
- 1986-08-29 DE DE19863629382 patent/DE3629382A1/de not_active Withdrawn
- 1986-08-29 DE DE8686111976T patent/DE3661845D1/de not_active Expired
- 1986-08-29 EP EP86111976A patent/EP0214571B1/de not_active Expired
- 1986-09-03 CA CA000517392A patent/CA1274156A/en not_active Expired - Lifetime
- 1986-09-03 ZA ZA866712A patent/ZA866712B/xx unknown
- 1986-09-25 GB GB8621414A patent/GB2180263B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0214571A1 (de) | 1987-03-18 |
| AU584454B2 (en) | 1989-05-25 |
| JPH0419313B2 (enrdf_load_stackoverflow) | 1992-03-30 |
| CA1274156A (en) | 1990-09-18 |
| GB2180263B (en) | 1989-08-16 |
| ZA866712B (en) | 1987-11-25 |
| AU6181586A (en) | 1987-03-12 |
| NZ217245A (en) | 1988-10-28 |
| JPS6256580A (ja) | 1987-03-12 |
| US4749418A (en) | 1988-06-07 |
| DE3661845D1 (en) | 1989-02-23 |
| GB2180263A (en) | 1987-03-25 |
| DE3629382A1 (de) | 1987-03-05 |
| GB8621414D0 (en) | 1986-10-15 |
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