US2814577A - Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces - Google Patents
Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces Download PDFInfo
- Publication number
- US2814577A US2814577A US586646A US58664656A US2814577A US 2814577 A US2814577 A US 2814577A US 586646 A US586646 A US 586646A US 58664656 A US58664656 A US 58664656A US 2814577 A US2814577 A US 2814577A
- Authority
- US
- United States
- Prior art keywords
- bath
- aluminum
- corrosion resistant
- color
- fluoride
- 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
- 229910052782 aluminium Inorganic materials 0.000 title description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 16
- 238000000576 coating method Methods 0.000 title description 14
- 238000000034 method Methods 0.000 title description 10
- 238000005260 corrosion Methods 0.000 title description 7
- 230000007797 corrosion Effects 0.000 title description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical class [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 5
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 4
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229940000489 arsenate Drugs 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- -1 fluoride ions Chemical class 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- BFXAWOHHDUIALU-UHFFFAOYSA-M sodium;hydron;difluoride Chemical compound F.[F-].[Na+] BFXAWOHHDUIALU-UHFFFAOYSA-M 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
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/77—Controlling or regulating of the coating process
Definitions
- This invention relates to the art of applying a chemically bonded coating to the surface of aluminum or alloys thereof in which aluminum is the principal ingredieat, but before stating the objects of the invention, it is desired to refer briefly to certain coating procedures which are now familiar to those skilled in the art.
- the present invention is based upon the discovery that, if the maintenance of a set and definite fiuoride:chromate ratio is dispensed with and if, for lack of a better expression what may be termed active fluoride, is kept substantially constant, regardless of the actual fluoride:chromate ratio, the bath will produce corrosion resistant and decorative coatings of uniform color and appearance on a succession of aluminum surfaces. Naturally, the concentration of hexavalent chromium and phosphate or arsenate should be maintained at conventional concentrations by conventional means.
- active fluoride is used herein to mean the ability of the coating bath to etch a piece of lime soda glass as measured by weight loss.
- Such a bath is capable of producing a soft green color when used in a dip process at F. with a treating time of approximately 1 /2 minutes.
- the fluoride activity was measured by immersing a lime soda microscope slide in a part of the bath for /2 hour at a temperature of F.
- the microscope slide was approximately 4 x 3% inches in size.
- the fluoride activity caused a loss of 39.5 mgs. of glass.
- the method of replenishing the solution which includes adding thereto compounds containing chromate ions and ions from the class of phosphates and arsenates sufficient to maintain the required concentrations thereof plus fluoride in suflicient quantity to maintain the fluoride activity of the solution substantially constant as measured by determining the weight loss of a standard piece and type of glass when immersed in the solution for a given period of time at a substantially constant temperature.
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 (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL210440D NL210440A (en)van) | 1956-05-23 | ||
| US586646A US2814577A (en) | 1956-05-23 | 1956-05-23 | Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces |
| DEA25536A DE1112370B (de) | 1956-05-23 | 1956-08-23 | Verfahren zur Erzeugung gleichfoermiger gefaerbter UEberzuege auf Aluminium und dessen Legierungen |
| NL210440A NL97942C (nl) | 1956-05-23 | 1956-09-07 | Werkwijze voor het aanbrengen van gelijkmatige bekledingen op aluminium en legeringen daarvan |
| FR1157610D FR1157610A (fr) | 1956-05-23 | 1956-09-24 | Perfectionnements apportés aux procédés pour obtenir des revêtements uniformes sur l'aluminium et ses alliages |
| GB32899/56A GB803405A (en) | 1956-05-23 | 1956-10-29 | Improvements in or relating to the production of corrosion-resistant coatings on aluminium or aluminium-alloys |
| BE555607D BE555607A (en)van) | 1956-05-23 | 1957-03-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US586646A US2814577A (en) | 1956-05-23 | 1956-05-23 | Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2814577A true US2814577A (en) | 1957-11-26 |
Family
ID=24346583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US586646A Expired - Lifetime US2814577A (en) | 1956-05-23 | 1956-05-23 | Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2814577A (en)van) |
| BE (1) | BE555607A (en)van) |
| DE (1) | DE1112370B (en)van) |
| FR (1) | FR1157610A (en)van) |
| GB (1) | GB803405A (en)van) |
| NL (2) | NL97942C (en)van) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3140245A (en) * | 1961-08-23 | 1964-07-07 | Gallaccio Anthony | Dulling hard aluminum oxide coatings on aluminum-rich basis metals |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB851027A (en) * | 1959-12-17 | 1960-10-12 | Amchem Prod | Improvements in or relating to the application of chemically-bonded coatings to the surface of aluminium |
| US5462634A (en) * | 1991-08-23 | 1995-10-31 | Honda Giken Kogyo Kabushiki Kaisha | Surface-treated aluminum material and method for its surface treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438877A (en) * | 1945-09-06 | 1948-03-30 | American Chem Paint Co | Composition for and method of coating aluminum |
| US2679752A (en) * | 1949-11-25 | 1954-06-01 | Socony Vacuum Oil Co Inc | Method for measuring corrosivity of fluids |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE467610A (en)van) * | 1945-06-30 | |||
| US2487137A (en) * | 1947-09-10 | 1949-11-08 | Armco Steel Corp | Producing coatings on metal |
-
0
- NL NL210440D patent/NL210440A/xx unknown
-
1956
- 1956-05-23 US US586646A patent/US2814577A/en not_active Expired - Lifetime
- 1956-08-23 DE DEA25536A patent/DE1112370B/de active Pending
- 1956-09-07 NL NL210440A patent/NL97942C/nl active
- 1956-09-24 FR FR1157610D patent/FR1157610A/fr not_active Expired
- 1956-10-29 GB GB32899/56A patent/GB803405A/en not_active Expired
-
1957
- 1957-03-07 BE BE555607D patent/BE555607A/xx unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438877A (en) * | 1945-09-06 | 1948-03-30 | American Chem Paint Co | Composition for and method of coating aluminum |
| US2679752A (en) * | 1949-11-25 | 1954-06-01 | Socony Vacuum Oil Co Inc | Method for measuring corrosivity of fluids |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3140245A (en) * | 1961-08-23 | 1964-07-07 | Gallaccio Anthony | Dulling hard aluminum oxide coatings on aluminum-rich basis metals |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1112370B (de) | 1961-08-03 |
| NL210440A (en)van) | |
| GB803405A (en) | 1958-10-22 |
| BE555607A (en)van) | 1957-03-30 |
| NL97942C (nl) | 1961-05-15 |
| FR1157610A (fr) | 1958-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1200470A (en) | Low zinc content, replenishment | |
| US2312855A (en) | Method of coating aluminum | |
| US3676224A (en) | Phosphating solution with scale suppressing characteristics | |
| US3876435A (en) | Chromate conversion coating solutions having chloride, sulfate, and nitrate anions | |
| US2487137A (en) | Producing coatings on metal | |
| US2477841A (en) | Method of coating metal surfaces comprising aluminum | |
| CA1308338C (en) | Process of producing phosphate coatings on metal surfaces | |
| US2665231A (en) | Coating process with alkali metal phosphate and added fluoride salt | |
| US4146410A (en) | Non-ferricyanide chromate conversion coating for aluminum surfaces | |
| US2868679A (en) | Process and compositions for producing aluminum surface conversion coatings | |
| US2121574A (en) | Art of coating zinc | |
| US3222226A (en) | Method of and solution for improving conversion coated metallic surfaces | |
| JPH0331790B2 (en)van) | ||
| US2814577A (en) | Method of producing corrosion resistant coatings of uniform color and appearnce on asuccession of aluminum pieces | |
| US3240633A (en) | Method of forming phosphate coating on zinc | |
| US2867514A (en) | Method of deoxidizing an aluminum surface | |
| US2928763A (en) | Aluminum chromating process | |
| USRE26130E (en) | Solution and method for brightening cadmium | |
| EP0486576A1 (de) | Verfahren zur herstellung von manganhaltigen zinkphosphatschichten auf verzinktem stahl. | |
| US2948643A (en) | Process and compositions for producing aluminum surface conversion coatings | |
| US3664887A (en) | Process for increasing corrosion resistance of conversion coated metal | |
| US2936254A (en) | Coating baths for aluminum and method of and materials for preparing and replenishing same | |
| US3447972A (en) | Process and compositions for producing aluminum surface conversion coatings | |
| US4089710A (en) | Phosphating method with control in response to conductivity change | |
| US3459600A (en) | Novel zinc coating composition and method |