US2825697A - Method of and solution for the surface treatment of aluminum - Google Patents
Method of and solution for the surface treatment of aluminum Download PDFInfo
- Publication number
- US2825697A US2825697A US448164A US44816454A US2825697A US 2825697 A US2825697 A US 2825697A US 448164 A US448164 A US 448164A US 44816454 A US44816454 A US 44816454A US 2825697 A US2825697 A US 2825697A
- Authority
- US
- United States
- Prior art keywords
- solution
- aluminum
- fluorine
- gram
- hexavalent chromium
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 22
- 229910052782 aluminium Inorganic materials 0.000 title claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 21
- 238000004381 surface treatment Methods 0.000 title 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 229910052731 fluorine Inorganic materials 0.000 claims description 11
- 239000011737 fluorine Substances 0.000 claims description 11
- 230000007797 corrosion Effects 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000011260 aqueous acid Substances 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- 101100459267 Crotalus durissus terrificus CRO3 gene Proteins 0.000 claims 1
- 239000002253 acid Substances 0.000 description 11
- 125000001153 fluoro group Chemical group F* 0.000 description 8
- 238000011282 treatment Methods 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 5
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- 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 description 4
- 239000000463 material Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- BJZIJOLEWHWTJO-UHFFFAOYSA-H dipotassium;hexafluorozirconium(2-) Chemical compound [F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Zr+4] BJZIJOLEWHWTJO-UHFFFAOYSA-H 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 fluosilicic acid Chemical compound 0.000 description 1
- 229960000443 hydrochloric acid Drugs 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- SQTLECAKIMBJGK-UHFFFAOYSA-I potassium;titanium(4+);pentafluoride Chemical compound [F-].[F-].[F-].[F-].[F-].[K+].[Ti+4] SQTLECAKIMBJGK-UHFFFAOYSA-I 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000009736 wetting Methods 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
Definitions
- the principal object of our invention is the provision of a method and solution for the treatment of aluminum surfaces whereby they may be rendered highly passive and corrosion resistant without discoloring or in-any way marring the surface and without using cumbersome electrolytic equipment.
- Another object of the invention is to provide a process of the character described which is so simple and effective that it can be used by relatively unskilled personnel and under a-wide variety of conditions-4n other words, .a process which is relatively uncritical as to the manner and means by which it is carriedout.
- Still another object ofthe invention is the provision of a process for effecting the foregoing objectives without the necessity of removing from .the surface of the aluminum any pre-formed naturally occurring oxide film which may be present.
- fluorine-bearing compound we mean a complex fluoride such as fluosilicic acid, fluoboric acid, fluozirconic acid, fluostannic acid,fiuotitanic acid and p rates Patent f 2,825,697 r Ce Patented :Mar. e4, 1958 the soluble saltstofany of :them. 'By the term .hexavalent chromium, we mean chromic acid (CrO or its soluble salts such as ammonium dichromate, potassium dichromate, sodium chromate, etc.
- the amounts of these ingredients present .in the solution is important. Of the fluorine-bearing compound there should be present in the bathbetween 0.1 and 1.0 gram per liter calculated as-fluorine. At concentrations of less than 0.1 gram per liter there is a marked falling off in the-elfect produced by the solution. At concentrations greater than -1 gram perliter there is atendency to produce a visible coating upon the aluminum.
- the quantity of hexavalent chromium in .the bath there should be from 0.4 gram to-4/gramsper liter calculated as CrO Atconcentrations ofless than 0.4 gram very little .effect is produced and when the concentration exceeds 4 grams .per liter there is ,a tendency ,for the solution to produce a visiblecoating on the aluminum.
- the pH of the treating solution is also important.
- the fluorine-bearingcompound and ;the hemvalent chromium should be present in the solution in such proportions and amounts as to yield a pH of from 2.0 to 4.0. At pHs below 2.0 there is a tendency for the solution to produce visible coatings on the aluminum and at pHs above 4.0 the surface does .not appear to become particularly passive.
- a pH as specified .it may be adjusted,,if too high, by the addition of a suitable .quantity .of some mineralacid such as nitric. acid ,or hydrochloricacid. on the other hand, if .thepH is too .low, it can be raised ,by proper additions ofan alkali such as sodium hydroxide, ammonium hydroxide, etc.
- the manner in .whichthe solution is broughtinto contact with the surface is also capableof considerbale variation .withoutin any way hindering the results to be ob tained.
- the article to be treated maybe immersed in the bath or the solution may be applied to the surface as a spray or it may be wiped with a cloth dampened with the solution or by any other means which insures through wetting of the surface.
- the solution is applied by some wiping expedient it is allowed to dry on the surface but regardless of these various factors we have learned by experience that best results are generally obtained if the following rule of thumb method of preparing the treating bath is employed.
- the concentration of fluorine-bearing compound When the concentration of fluorine-bearing compound is relatively low then the concentration of hexavalent chromium should also be relatively low and, conversely, when the concentration of fluorine-bearing compound is high the concentration of hexavalent chromium also should be relatively high.
- Another general rule which it is useful to observe is that where the solution is used hot we prefer a more dilute solution and, conversely, where the solution is to be applied at a relatively cool temperature,
- Example 1 Grams Chromic acid 0.46 Potassium zirconium fluoride 0.29 Water, to make 1 liter.
- Example 2 Grams Chromic acid 2 Potassium titanium fluoride 1.4 Water, to make 1 liter.
- Example 1 The material of Example 1 is ideally adapted to treat aluminum in an immersion process and we have secured excellent results by immersion for from one to two minutes with the temperature of the bath maintained at approximately 160 F. Following this, the article is removed, excess liquid is rinsed otf with ordinary tap water and the surface dried.
- the surface to be treated should be relatively clean although it is not necessary to remove any natural light oxide film which may be present unless such film is of a nature which is aesthetically unappealing or unsatisfactory, it being understood in this connection that the present invention is primarily concerned with a passivating procedure which leaves the surface substantially colorless or unchanged.
- naturally occurring oxide films are not deleterious, per se, which, of course, is a distinct advantage over other procedures heretofore employed which first require the removal of any natural oxide film before the treatment is applied.
- the amount of passivation and corrosion resistance secured by our invention seems to be markedly enhanced in situations where a naturally occurring oxide film is left on the surface at the time that our solution is applied thereto.
- Example 2 The material of Example 2 is ideally adapted for application to the surface by means of brush, rags, etc. and we have found that by using a material such as exemplified by Example 2, exceedingly good passivation is achieved if the solution is permitted to act upon the surface for from one to two minutes at room temperature although no harm is done if the material is permitted to dry upon the surface should this be desirable or convenient. However, if the solution is permitted to dry on the surface the aluminum may be stained somewhat due to the hexavalent chromium powder which will be found lying loose on the surface.
- Spraying procedures for applying the solution may also be employed but in such procedures as well as in the foregoing procedures length of time and the temperature of the bath do not seem to be too critical although from the standpoint of economy in cost reasonably short 4 periods of exposure to the effects of the solution and relatively low temperatures are to be preferred.
- the invisible passivation which we secure is obtained by utilizing what may be described as an activating solution which definition is employed because of the peculiar properties imparted to the aluminum surface by the process which we have developed.
- an activating solution which definition is employed because of the peculiar properties imparted to the aluminum surface by the process which we have developed.
- a previously deoxidized aluminum surface is treated according to our invention it will exhibit, immediately after the treatment, an extremely low electrical surface contact resistance. This bespeaks an activated surface toward oxidation.
- the electric contact resistance of a surface treated in accordance with our invention rapidly increases after a short time lapse and at a much greater rate than it does on a deoxidized but otherwise untreated aluminum surface.
- the method of increasing the corrosion resistance of an aluminum surface without changing its appearance which consists in treating the surface with an aqueous acid solution consisting essentially of hexavalent chromium and a soluble complex fluorine-bearing compound, the amount of hexavalent chromium being from 0.4 gram to 4 grams per liter calculated as CrO and the amount of fluorine-bearing compound being from 0.1 gram to 1.0 gram per liter calculated as fluorine and the pH of the solution being from 2.0 to 4.0.
- hexavalent chromium is chosen from the group consisting of chromic acid (Cr0 and its soluble salts and the fluorine-bearing compound is chosen from the group which consists of fluosilicic acid, fluoboric acid, fiuozirconic acid, fluostannic acid, fiuotitanic acid and the soluble salts thereof.
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)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE538540D BE538540A (en)van) | 1954-08-05 | ||
| US448164A US2825697A (en) | 1954-08-05 | 1954-08-05 | Method of and solution for the surface treatment of aluminum |
| DEA21949A DE973261C (de) | 1954-08-05 | 1955-01-21 | Loesung zur Erhoehung der Korrosionsbestaendigkeit von Aluminium und dessen Legierungen und Verfahren zu ihrer Anwendung |
| GB4812/55A GB767888A (en) | 1954-08-05 | 1955-02-17 | Method of and materials for the surface treatment of aluminium and its alloys |
| FR1119649D FR1119649A (fr) | 1954-08-05 | 1955-02-28 | Perfectionnements apportés aux procédés et produits pour augmenter la résistanceà la corrosion de l'aluminium et de ses alliages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US448164A US2825697A (en) | 1954-08-05 | 1954-08-05 | Method of and solution for the surface treatment of aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2825697A true US2825697A (en) | 1958-03-04 |
Family
ID=23779256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US448164A Expired - Lifetime US2825697A (en) | 1954-08-05 | 1954-08-05 | Method of and solution for the surface treatment of aluminum |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2825697A (en)van) |
| BE (1) | BE538540A (en)van) |
| DE (1) | DE973261C (en)van) |
| FR (1) | FR1119649A (en)van) |
| GB (1) | GB767888A (en)van) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2988465A (en) * | 1959-11-19 | 1961-06-13 | Amchem Prod | Method of producing chemical conversion coatings on aluminum surfaces |
| US3062748A (en) * | 1959-08-24 | 1962-11-06 | Dow Chemical Co | Inhibited aqueous acidic composition |
| US3098775A (en) * | 1961-08-09 | 1963-07-23 | Amchem Prod | Method of applying a chromate conversion coating to the surface of aluminum |
| US3342601A (en) * | 1964-02-27 | 1967-09-19 | Eastman Kodak Co | Lithographic printing plate |
| US4273592A (en) * | 1979-12-26 | 1981-06-16 | Amchem Products, Inc. | Coating solution for metal surfaces |
| US5129967A (en) * | 1988-05-03 | 1992-07-14 | Betz Laboratories, Inc. | Composition and method for non-chromate coating of aluminum |
| US5219617A (en) * | 1989-09-19 | 1993-06-15 | Michigan Chrome And Chemical Company | Corrosion resistant coated articles and process for making same |
| US5702759A (en) * | 1994-12-23 | 1997-12-30 | Henkel Corporation | Applicator for flowable materials |
| US5769967A (en) * | 1992-04-01 | 1998-06-23 | Henkel Corporation | Composition and process for treating metal |
| US20070125451A1 (en) * | 2005-01-14 | 2007-06-07 | Smith Steven R | Stable, thin-film organic passivates |
| EP1870489A1 (de) | 2006-04-19 | 2007-12-26 | Ropal AG | Verfahren zur Herstellung eines korrosionsgeschützten und hochglänzenden Substrats |
| DE102007046925A1 (de) | 2007-09-28 | 2009-04-09 | Ropal Ag | Verfahren zur Herstellung von Kunststoff- und Metallformkörpern |
| EP2123366A1 (de) | 2008-05-23 | 2009-11-25 | Mattthias Koch | Beschichtete Substrate und Verfahren zu deren Herstellung |
| EP2752504A1 (de) | 2013-01-08 | 2014-07-09 | ROPAL Europe AG | Verfahren zur Herstellung eines korrosionsgeschützten, glänzenden, metallisch beschichteten Substrats, das metallisch beschichtete Substrat sowie dessen Verwendung |
| EP3117907A1 (de) | 2015-07-13 | 2017-01-18 | Matthias Koch | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung sowie anlagen zur herstellung beschichteter substrate |
| EP3225717A1 (de) | 2016-03-30 | 2017-10-04 | HEC High End Coating GmbH | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE566276A (en)van) * | 1957-08-19 | 1958-04-15 | ||
| DE1290410C2 (de) * | 1963-11-12 | 1974-05-30 | Pennsalt Chemicals Corp | Waessrige, saure fluorid-ionen und einen anorganischen inhibitor enthaltende loesung, die praktisch frei von chloridionen ist, und verfahren zum reinigen von aluminium und aluminiumlegierungen |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2494910A (en) * | 1948-07-12 | 1950-01-17 | American Chem Paint Co | Method of and composition for coating aluminum |
| US2499231A (en) * | 1944-08-25 | 1950-02-28 | United Chromium Inc | Method of producing surface conversion coatings on zinc |
| US2563431A (en) * | 1951-08-07 | Method of improving the resistance | ||
| US2568936A (en) * | 1949-12-14 | 1951-09-25 | American Chem Paint Co | Method of improving the resistance to corrosion and abrasion of certain coated aluminum surfaces |
| US2655439A (en) * | 1952-12-15 | 1953-10-13 | Ryan Aeronautical Co | Compounded fluoborate chemical surface treatment of aluminum and aluminum alloys |
| US2678291A (en) * | 1945-06-30 | 1954-05-11 | American Chem Paint Co | Method of and materials for producing coated aluminum |
| US2727841A (en) * | 1950-11-30 | 1955-12-20 | Poor & Co | Method and composition for improving corrosion resistance of zinc |
| US2762731A (en) * | 1952-03-29 | 1956-09-11 | American Chem Paint Co | Method of and materials for producing paint bonding films on ferriferous metal surfaces |
| US2798830A (en) * | 1953-08-04 | 1957-07-09 | American Chem Paint Co | Method of improving the corrosion resistance of certain coated aluminum surfaces |
| US2798829A (en) * | 1953-08-04 | 1957-07-09 | American Chem Paint Co | Process for enhancing the corrosion resistance of certain coated aluminum surfaces |
-
0
- BE BE538540D patent/BE538540A/xx unknown
-
1954
- 1954-08-05 US US448164A patent/US2825697A/en not_active Expired - Lifetime
-
1955
- 1955-01-21 DE DEA21949A patent/DE973261C/de not_active Expired
- 1955-02-17 GB GB4812/55A patent/GB767888A/en not_active Expired
- 1955-02-28 FR FR1119649D patent/FR1119649A/fr not_active Expired
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563431A (en) * | 1951-08-07 | Method of improving the resistance | ||
| US2499231A (en) * | 1944-08-25 | 1950-02-28 | United Chromium Inc | Method of producing surface conversion coatings on zinc |
| US2678291A (en) * | 1945-06-30 | 1954-05-11 | American Chem Paint Co | Method of and materials for producing coated aluminum |
| US2494910A (en) * | 1948-07-12 | 1950-01-17 | American Chem Paint Co | Method of and composition for coating aluminum |
| US2568936A (en) * | 1949-12-14 | 1951-09-25 | American Chem Paint Co | Method of improving the resistance to corrosion and abrasion of certain coated aluminum surfaces |
| US2727841A (en) * | 1950-11-30 | 1955-12-20 | Poor & Co | Method and composition for improving corrosion resistance of zinc |
| US2762731A (en) * | 1952-03-29 | 1956-09-11 | American Chem Paint Co | Method of and materials for producing paint bonding films on ferriferous metal surfaces |
| US2655439A (en) * | 1952-12-15 | 1953-10-13 | Ryan Aeronautical Co | Compounded fluoborate chemical surface treatment of aluminum and aluminum alloys |
| US2798830A (en) * | 1953-08-04 | 1957-07-09 | American Chem Paint Co | Method of improving the corrosion resistance of certain coated aluminum surfaces |
| US2798829A (en) * | 1953-08-04 | 1957-07-09 | American Chem Paint Co | Process for enhancing the corrosion resistance of certain coated aluminum surfaces |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3062748A (en) * | 1959-08-24 | 1962-11-06 | Dow Chemical Co | Inhibited aqueous acidic composition |
| US2988465A (en) * | 1959-11-19 | 1961-06-13 | Amchem Prod | Method of producing chemical conversion coatings on aluminum surfaces |
| US3098775A (en) * | 1961-08-09 | 1963-07-23 | Amchem Prod | Method of applying a chromate conversion coating to the surface of aluminum |
| US3342601A (en) * | 1964-02-27 | 1967-09-19 | Eastman Kodak Co | Lithographic printing plate |
| US4273592A (en) * | 1979-12-26 | 1981-06-16 | Amchem Products, Inc. | Coating solution for metal surfaces |
| US5129967A (en) * | 1988-05-03 | 1992-07-14 | Betz Laboratories, Inc. | Composition and method for non-chromate coating of aluminum |
| US5219617A (en) * | 1989-09-19 | 1993-06-15 | Michigan Chrome And Chemical Company | Corrosion resistant coated articles and process for making same |
| US5492766A (en) * | 1989-09-19 | 1996-02-20 | Michigan Chrome And Chemical Company | Corrosion resistant coated articles and process for making same |
| US5769967A (en) * | 1992-04-01 | 1998-06-23 | Henkel Corporation | Composition and process for treating metal |
| US5702759A (en) * | 1994-12-23 | 1997-12-30 | Henkel Corporation | Applicator for flowable materials |
| US6010263A (en) * | 1994-12-23 | 2000-01-04 | Henkel Corporation | Applicator for flowable materials |
| US6048921A (en) * | 1994-12-23 | 2000-04-11 | Henkel Corporation | Method for applying conversion coating with wick applicator |
| US20070125451A1 (en) * | 2005-01-14 | 2007-06-07 | Smith Steven R | Stable, thin-film organic passivates |
| EP1870489A1 (de) | 2006-04-19 | 2007-12-26 | Ropal AG | Verfahren zur Herstellung eines korrosionsgeschützten und hochglänzenden Substrats |
| US20100075172A1 (en) * | 2006-04-19 | 2010-03-25 | Ropal Ag | Process for producing a corrosion-protected and high-gloss substrate |
| US8993119B2 (en) | 2006-04-19 | 2015-03-31 | Ropal Europe Ag | Process for producing a corrosion-protected and high-gloss substrate |
| DE102007046925A1 (de) | 2007-09-28 | 2009-04-09 | Ropal Ag | Verfahren zur Herstellung von Kunststoff- und Metallformkörpern |
| EP2123366A1 (de) | 2008-05-23 | 2009-11-25 | Mattthias Koch | Beschichtete Substrate und Verfahren zu deren Herstellung |
| EP2752504A1 (de) | 2013-01-08 | 2014-07-09 | ROPAL Europe AG | Verfahren zur Herstellung eines korrosionsgeschützten, glänzenden, metallisch beschichteten Substrats, das metallisch beschichtete Substrat sowie dessen Verwendung |
| EP3117907A1 (de) | 2015-07-13 | 2017-01-18 | Matthias Koch | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung sowie anlagen zur herstellung beschichteter substrate |
| EP3120939A1 (de) | 2015-07-13 | 2017-01-25 | Matthias Koch | Beschichtete substrate und deren verwendung sowie anlagen zur herstellung der beschichteten substrate |
| EP3225717A1 (de) | 2016-03-30 | 2017-10-04 | HEC High End Coating GmbH | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung |
| WO2017167844A1 (de) | 2016-03-30 | 2017-10-05 | Hec High End Coating Gmbh | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung |
| EP3228727A2 (de) | 2016-03-30 | 2017-10-11 | HEC High End Coating GmbH | Verfahren zur herstellung beschichteter substrate, beschichtete substrate und deren verwendung |
| US11691176B2 (en) | 2016-03-30 | 2023-07-04 | Hec High End Coating Gmbh | Method for producing coated metallic substrates and coated metallic substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| GB767888A (en) | 1957-02-06 |
| DE973261C (de) | 1959-12-31 |
| FR1119649A (fr) | 1956-06-22 |
| BE538540A (en)van) |
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