US2851385A - Process and composition for coating aluminum surfaces - Google Patents
Process and composition for coating aluminum surfaces Download PDFInfo
- Publication number
- US2851385A US2851385A US280364A US28036452A US2851385A US 2851385 A US2851385 A US 2851385A US 280364 A US280364 A US 280364A US 28036452 A US28036452 A US 28036452A US 2851385 A US2851385 A US 2851385A
- Authority
- US
- United States
- Prior art keywords
- bath
- coating
- acid
- producing
- aluminum
- 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
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
-
- 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
- This invention relates to the art of producing a chemically bonded chromate conversion coating on surfaces of aluminum or alloys thereof in which aluminum is the principal or predominant ingredient.
- the principal object of the invention is to render aluminum surfaces highly resistant to corrosion regardless of whether or not the coated surface is subsequently given a finish of paint, lacquer, enamel, japan or the like.
- the present invention is based upon the discovery that the corrosion resistance which can be imparted to surfaces of aluminum by treatments of the character just described can be still further enhanced if there be added to the baths which are employed in producing the coat-# ing ions of metal from the class consisting of zirconium, titanium and tin. Moreover, the use of such metal additions to coating baths of the character described makes it possible to operate the baths at considerably lower temperatures than has heretofore been customary. Indeed, with our invention, it is even possible to produce coatings at room temperature or lower. By room temperature is meant average living temperature, which is in the neighborhood of 72 F.
- the form in which the dissolved zirconium, titanium or tin is introduced into the coating bath appears to make little or no difference so long as the composition of the solution is not otherwise adversely disturbed.
- these metals should not be introduced along with reducing agents which would cause a loss of hexavalent chromium by the reduction thereof to trivalent chromium.
- Diammoniumsilicofluoride (NHqJgslFs 14 Chromic acid--- 10 Zirconium nitrate Zr(NO .5H O 12 Water to make 1 liter.
- mixtures of the metals may be used.
- the amount of stannic chloride used may be reduced by means of additions of titanium trichloride or of zirconium nitrate or both.
- the surface to be coated should first be cleaned.
- the cleaning which forms no part of the present invention, may be carried out by conventional methods. For instance, grease and dirt may be removed by dipping into a mild silicate alkali bath or by the use of an emulsion of a grease solvent.
- the clean work either wet or dry, may be treated with a solution of the character described, such for example as the solutions of the formulae given above.
- the treatment may be given by immersing the surface to be coated in the solution, by flowing or spraying the solution on the work or by any other convenient technique in which the solution is allowed to act upon the work.
- the solution of Formula No. 1 may be heated to approxi mately F. and the clean work immersed in it for approximately 30 seconds to 2 minutes.
- the article may be rinsed with clean water and dried and afterwards painted, if desired.
- the rinsing may be done with a dilute solution of Formula No. 1, after which the article may be dried and then painted. Or, if the piece is not to be painted, it may simply be removed from the solution and dried.
- our invention makes it possible to operate with baths at considerably lower temperatures than has been possible heretofore.
- prior practice coating baths of silico-fluoride and chromic acid have been used hot,fi. e., at or near the boiling point. With our solutions thisis not necessary, although some slight increase in temperature may be employed if desired because of the greater rapidity of the resulting actioiif Nevertheless, and by way 'of-specific example, Form'ulfNo. 5 as given above will produce excellent corrosion resistant coatings if the cleaned article is immersed in the bath for a period of 1 to 2 minutes at a temperature not exceeding 80 F. Subject to minor variations the formulas of the other examples will yield comparable results as to temperature and time of treatment needed to produce good coatings. This is a marked and very valuable advantage of our invention.
Description
nited States PatentO "lce PROCESS AND COMPOSITION FOR COATING ALUMINUM SURFACES Frank Palin Spruance, Jr., Ambler, and Nelson James Newhard, Jr., Oreland, Pa., assignors to Amchem Products, Inc., a corporation of Delaware No Drawing. Application April 3, 1952 Serial No. 280,364
2 Claims. (Cl. 1486.2)
This invention relates to the art of producing a chemically bonded chromate conversion coating on surfaces of aluminum or alloys thereof in which aluminum is the principal or predominant ingredient.
The principal object of the invention is to render aluminum surfaces highly resistant to corrosion regardless of whether or not the coated surface is subsequently given a finish of paint, lacquer, enamel, japan or the like.
Herefore, it has been known that the durability and corrosion resistance of aluminum surfaces even under abnormally severe corrosive conditions can be improved by forming thereon a chemically bonded chi-ornate conversion coating by subjecting them to the action of an aqueous acid solution of hexavalent chromium and fluorine-bearing compounds, such as hydrofluoric acid, hydrofiuosilicic acid, fluoboric acid and their soluble salts. Specific examples of such processes are described in United States Patents Nos. 2,276,353 and 2,507,956, and such processes are now very generally known to those skilled in this art as chromate conversion coverings.
The present invention is based upon the discovery that the corrosion resistance which can be imparted to surfaces of aluminum by treatments of the character just described can be still further enhanced if there be added to the baths which are employed in producing the coat-# ing ions of metal from the class consisting of zirconium, titanium and tin. Moreover, the use of such metal additions to coating baths of the character described makes it possible to operate the baths at considerably lower temperatures than has heretofore been customary. Indeed, with our invention, it is even possible to produce coatings at room temperature or lower. By room temperature is meant average living temperature, which is in the neighborhood of 72 F.
The form in which the dissolved zirconium, titanium or tin is introduced into the coating bath appears to make little or no difference so long as the composition of the solution is not otherwise adversely disturbed. For example, these metals should not be introduced along with reducing agents which would cause a loss of hexavalent chromium by the reduction thereof to trivalent chromium. We have found it very desirable to introduce the metals as fluozirconic acid, fluotitanic acid, fluostannic acid or soluble salts of such acids, etc. Indeed, as an actual matter of fact, their introduction as fluorine acids is highly desirable because when so introduced they serve as a source of fluorine.
There is no minimum limit for concentration of the metals in the operating bath because an improvement is achieved even when using only very small amounts. Furthermore, as far as we can ascertain, excess amounts appear to do no harm but, generally speaking, in the interest of economy, we prefer to use from 0.1 to 7.0 grams of the metal per liter of operating bath.
By way of specific example we cite the following:
2,851,385. Patented Sept. 9, 1958 2 Formula No. 1
G. Chromic d 1 6 Potassium zirconium fluoride 2.5 Ammonium borofluoridenr 7.6
Water to make 1 liter.
Other representative bath formulae which can be employed with our invention are as follows:
Formula N 0. 2
Chromic acid- 1 I a a.. v 8.4 Potassium zirconium fluoride 3.5 Boric acid 6.3 Ammonium bifluoride 4.0 Water to make 1 liter.
F orm ula No. 3
G. Chromic acid 8 Hydrofluoric acid 2.5 23% titanium trichloride 3.2 Water to make 1 liter.
4.5 ml. of 48% acid.
Formula N0. 4
Ammonium bifluoride 2.7 Chromic acid 6 Stannic chloride (SnC1 4.4 Water to make 1 liter.
Formula No. 5
G. Diammoniumsilicofluoride (NHqJgslFs 14 Chromic acid--- 10 Zirconium nitrate Zr(NO .5H O 12 Water to make 1 liter.
If desired, mixtures of the metals may be used. For instance, in Formula No. 4 as given above the amount of stannic chloride used may be reduced by means of additions of titanium trichloride or of zirconium nitrate or both.
In carrying out our improved process the surface to be coated should first be cleaned. The cleaning, which forms no part of the present invention, may be carried out by conventional methods. For instance, grease and dirt may be removed by dipping into a mild silicate alkali bath or by the use of an emulsion of a grease solvent. The clean work, either wet or dry, may be treated with a solution of the character described, such for example as the solutions of the formulae given above.
The treatment may be given by immersing the surface to be coated in the solution, by flowing or spraying the solution on the work or by any other convenient technique in which the solution is allowed to act upon the work. For example, if the solution of Formula No. 1 is used in a dip installation, it may be heated to approxi mately F. and the clean work immersed in it for approximately 30 seconds to 2 minutes. Upon rem-oval from the solution the article may be rinsed with clean water and dried and afterwards painted, if desired. Sometimes the rinsing may be done with a dilute solution of Formula No. 1, after which the article may be dried and then painted. Or, if the piece is not to be painted, it may simply be removed from the solution and dried.
As mentioned above, our invention makes it possible to operate with baths at considerably lower temperatures than has been possible heretofore. For instance, in prior practice coating baths of silico-fluoride and chromic acid have been used hot,fi. e., at or near the boiling point. With our solutions thisis not necessary, although some slight increase in temperature may be employed if desired because of the greater rapidity of the resulting actioiif Nevertheless, and by way 'of-specific example, Form'ulfNo. 5 as given above will produce excellent corrosion resistant coatings if the cleaned article is immersed in the bath for a period of 1 to 2 minutes at a temperature not exceeding 80 F. Subject to minor variations the formulas of the other examples will yield comparable results as to temperature and time of treatment needed to produce good coatings. This is a marked and very valuable advantage of our invention.
We claim:
1. In the art of producing a chromate conversion coating on surfaces of aluminum and alloys thereof in which aluminum is the predominant ingredient by treating the surface with an aqueous acid bath of the type which consists essentially of hexavalent chromium and fluorine in proportions capable of producing such a coating; the method which comprises including in the bath, as an addition agent, metal ions from the group consisting of zirconium, titanium and stannic tin in a quantity sufficient References Cited in the file of this patent UNITED STATES PATENTS 1,939,421 Tosterud Dec. 12, 1933 1,957,354 Prier May 1, 1934 2,276,353 Thompson Mar. 7, 1942 2,312,855 Thompson Mar. 2, 1943 2,348,698 Thompson May 9, 1944 2,357,219 Mott Aug. 29, 1944 FOREIGN PATENTS 546,466 Germany Mar. 12, 1932
Claims (1)
1. IN THE ART OF PRODUCING A CHROMATE CONVERSION COATING ON SURFACES OF ALUMINUM AND ALLOYS THEREOF IN WHICH ALIUMINUM IS THE PREDOMINANT INGREDIENT BY TREATING THE SURFACE WITH AN AQUEOUS ACID BATH OF THE TYPE WHICH CONSISTS ESSENTIALLY OF HEXAVALENT CHROMIUM AND FLUORINE IN PROPORTIONS CAPABLE OF PRODUCING SUCH A COATING; THE METHOD WHICH COMPRISES INCLUDING IN THE BATH, AS AN ADDITION AGENT, METAL IONS FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND STANNIC TIN IN A QUANTITY SUFFICIENT TO ENHANCE THE CORROSION RESISTANCE OF THE COATED SURFACE AND THEN TREATING THE SURFACE WITH SUCH BATH.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL83665D NL83665C (en) | 1952-04-03 | ||
NL201472D NL201472A (en) | 1952-04-03 | ||
NLAANVRAGE7903498,A NL174337B (en) | 1952-04-03 | DEVICE FOR REINDING A CONTINUOUS FIBER, IN PARTICULAR GLASS FIBER, ON SPOOLS. | |
BE516894D BE516894A (en) | 1952-04-03 | ||
NL81501D NL81501C (en) | 1952-04-03 | ||
US280364A US2851385A (en) | 1952-04-03 | 1952-04-03 | Process and composition for coating aluminum surfaces |
CH314927D CH314927A (en) | 1952-04-03 | 1952-12-08 | Process for the production of coatings on corrosive metals, means for its implementation, product and application of the process |
DEA17072D DE977586C (en) | 1952-04-03 | 1952-12-11 | Process for the production of coatings on aluminum and its alloys |
ES0206946A ES206946A1 (en) | 1952-04-03 | 1952-12-23 | Process and composition for coating aluminum surfaces |
FR1075264D FR1075264A (en) | 1952-04-03 | 1953-01-12 | Process and product for forming coatings on metals susceptible to corrosion attack |
GB8730/53A GB737705A (en) | 1952-04-03 | 1953-03-30 | Process and composition for producing protective coatings on aluminium and aluminiumalloys |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US280364A US2851385A (en) | 1952-04-03 | 1952-04-03 | Process and composition for coating aluminum surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
US2851385A true US2851385A (en) | 1958-09-09 |
Family
ID=23072766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US280364A Expired - Lifetime US2851385A (en) | 1952-04-03 | 1952-04-03 | Process and composition for coating aluminum surfaces |
Country Status (8)
Country | Link |
---|---|
US (1) | US2851385A (en) |
BE (1) | BE516894A (en) |
CH (1) | CH314927A (en) |
DE (1) | DE977586C (en) |
ES (1) | ES206946A1 (en) |
FR (1) | FR1075264A (en) |
GB (1) | GB737705A (en) |
NL (4) | NL201472A (en) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2957784A (en) * | 1958-09-18 | 1960-10-25 | Wolverine Fabricating & Mfg Co | Gasket material and method of producing the same |
US3018211A (en) * | 1959-01-26 | 1962-01-23 | Purex Corp Ltd | Composition and process for brightening aluminum and its alloys |
US3066055A (en) * | 1958-11-10 | 1962-11-27 | Purex Corp Ltd | Process and composition for producing aluminum surface conversion coatings |
US3113051A (en) * | 1961-09-29 | 1963-12-03 | Purex Corp Ltd | Process and composition for producing aluminum surface conversion coatings |
US3159509A (en) * | 1961-11-27 | 1964-12-01 | Okuno Chemical Industry Compan | Chromate process |
US3380858A (en) * | 1964-11-10 | 1968-04-30 | Hooker Chemical Corp | Chromate coating composition for aluminum and process |
US3494839A (en) * | 1967-01-23 | 1970-02-10 | Amchem Prod | Method of sealing chromic acid anodized aluminum surfaces |
US4063969A (en) * | 1976-02-09 | 1977-12-20 | Oxy Metal Industries Corporation | Treating aluminum with tannin and lithium |
US4111722A (en) * | 1976-02-09 | 1978-09-05 | Oxy Metal Industries Corporation | Tannin treatment of aluminum with a fluoride cleaner |
US4971636A (en) * | 1988-06-30 | 1990-11-20 | Nkk Corporation | Method of producing highly corrosion-resistant surface-treated steel plates |
US5123978A (en) * | 1991-03-19 | 1992-06-23 | The United States Of America As Represented By The Secretary Of The Navy | Corrosion resistant chromate conversion coatings for heat-treated aluminum alloys |
US5401334A (en) * | 1990-11-14 | 1995-03-28 | Titeflex Corporation | Fluoropolymer aluminum laminate |
US5547906A (en) * | 1992-09-14 | 1996-08-20 | Badehi; Pierre | Methods for producing integrated circuit devices |
US5702759A (en) * | 1994-12-23 | 1997-12-30 | Henkel Corporation | Applicator for flowable materials |
US5716759A (en) * | 1993-09-02 | 1998-02-10 | Shellcase Ltd. | Method and apparatus for producing integrated circuit devices |
US6040235A (en) * | 1994-01-17 | 2000-03-21 | Shellcase Ltd. | Methods and apparatus for producing integrated circuit devices |
US6117707A (en) * | 1994-07-13 | 2000-09-12 | Shellcase Ltd. | Methods of producing integrated circuit devices |
US20010018236A1 (en) * | 1999-12-10 | 2001-08-30 | Shellcase Ltd. | Methods for producing packaged integrated circuit devices & packaged integrated circuit devices produced thereby |
US20030151124A1 (en) * | 1998-02-06 | 2003-08-14 | Shellcase, Ltd. | Integrated circuit device |
US20040183185A1 (en) * | 1998-02-06 | 2004-09-23 | Avner Badihi | Packaged integrated circuits and methods of producing thereof |
US20040251525A1 (en) * | 2003-06-16 | 2004-12-16 | Shellcase Ltd. | Methods and apparatus for packaging integrated circuit devices |
US20050104179A1 (en) * | 2003-07-03 | 2005-05-19 | Shellcase Ltd. | Methods and apparatus for packaging integrated circuit devices |
US7033664B2 (en) | 2002-10-22 | 2006-04-25 | Tessera Technologies Hungary Kft | Methods for producing packaged integrated circuit devices and packaged integrated circuit devices produced thereby |
US20070034777A1 (en) * | 2005-08-12 | 2007-02-15 | Tessera, Inc. | Image sensor employing a plurality of photodetector arrays and/or rear-illuminated architecture |
US7224056B2 (en) | 2003-09-26 | 2007-05-29 | Tessera, Inc. | Back-face and edge interconnects for lidded package |
US7566955B2 (en) | 2001-08-28 | 2009-07-28 | Tessera, Inc. | High-frequency chip packages |
US7936062B2 (en) | 2006-01-23 | 2011-05-03 | Tessera Technologies Ireland Limited | Wafer level chip packaging |
US8143095B2 (en) | 2005-03-22 | 2012-03-27 | Tessera, Inc. | Sequential fabrication of vertical conductive interconnects in capped chips |
US8604605B2 (en) | 2007-01-05 | 2013-12-10 | Invensas Corp. | Microelectronic assembly with multi-layer support structure |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0364485A (en) * | 1989-08-01 | 1991-03-19 | Nippon Paint Co Ltd | Surface treating agent and treating bath for aluminum or aluminum alloy |
JP2839111B2 (en) * | 1990-08-28 | 1998-12-16 | 日本パーカライジング株式会社 | Chromate treatment method for galvanized steel sheet |
KR100292447B1 (en) * | 1991-08-30 | 2001-06-01 | 웨인 씨. 제쉬크 | Method of forming protective modified coating on metal substrate surface |
US5453295A (en) * | 1992-01-15 | 1995-09-26 | Morton International, Inc. | Method for preventing filiform corrosion of aluminum wheels by powder coating with a thermosetting resin |
US5441580A (en) * | 1993-10-15 | 1995-08-15 | Circle-Prosco, Inc. | Hydrophilic coatings for aluminum |
ITMI940194A1 (en) * | 1994-02-03 | 1995-08-03 | Paolo Granata & C S P A | CHROME PLATING OR PHOSPHOCROME PLATING PROCESS AND PRODUCTS SUITABLE FOR THE IDENTIFICATION OF THE TREATMENT PROCESS |
Citations (7)
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DE546466C (en) * | 1929-02-26 | 1932-03-12 | Otto Sprenger Patentverwertung | Process for the production of coatings containing manganese oxides on aluminum, magnesium and their alloys |
US1939421A (en) * | 1932-05-26 | 1933-12-12 | Aluminum Co Of America | Coating |
US1957354A (en) * | 1931-04-27 | 1934-05-01 | Prier Pierre | Process of protecting light metals against corrosion |
US2276353A (en) * | 1935-09-28 | 1942-03-17 | Parker Rust Proof Co | Process of coating |
US2312855A (en) * | 1940-09-07 | 1943-03-02 | Parker Rust Proof Co | Method of coating aluminum |
US2348698A (en) * | 1940-08-03 | 1944-05-09 | Parker Rust Proof Co | Method of roller coating |
US2357219A (en) * | 1942-01-10 | 1944-08-29 | Joseph P Moran | Corrosion-resistant ferrous alloys |
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US1710743A (en) * | 1926-04-16 | 1929-04-30 | Pacz Aladar | Surface treating aluminum articles |
FR42134E (en) * | 1932-01-28 | 1933-05-31 | Parker Ste Continentale | Process for protecting aluminum, magnesium and light and ultralight alloys against corrosion |
US2322208A (en) * | 1938-11-14 | 1943-06-22 | Dow Chemical Co | Method of providing a protective coating on magnesium and its alloys |
US2322349A (en) * | 1941-10-25 | 1943-06-22 | Westinghouse Electric & Mfg Co | Corrosion resistant coating for metal surfaces |
IT432445A (en) * | 1943-07-29 | |||
US2438877A (en) * | 1945-09-06 | 1948-03-30 | American Chem Paint Co | Composition for and method of coating aluminum |
US2507956A (en) * | 1947-11-01 | 1950-05-16 | Lithographic Technical Foundat | Process of coating aluminum |
US2516008A (en) * | 1948-06-19 | 1950-07-18 | Westinghouse Electric Corp | Composition and process for treating metal surfaces |
-
0
- NL NL81501D patent/NL81501C/xx active
- NL NLAANVRAGE7903498,A patent/NL174337B/en unknown
- BE BE516894D patent/BE516894A/xx unknown
- NL NL83665D patent/NL83665C/xx active
- NL NL201472D patent/NL201472A/xx unknown
-
1952
- 1952-04-03 US US280364A patent/US2851385A/en not_active Expired - Lifetime
- 1952-12-08 CH CH314927D patent/CH314927A/en unknown
- 1952-12-11 DE DEA17072D patent/DE977586C/en not_active Expired
- 1952-12-23 ES ES0206946A patent/ES206946A1/en not_active Expired
-
1953
- 1953-01-12 FR FR1075264D patent/FR1075264A/en not_active Expired
- 1953-03-30 GB GB8730/53A patent/GB737705A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE546466C (en) * | 1929-02-26 | 1932-03-12 | Otto Sprenger Patentverwertung | Process for the production of coatings containing manganese oxides on aluminum, magnesium and their alloys |
US1957354A (en) * | 1931-04-27 | 1934-05-01 | Prier Pierre | Process of protecting light metals against corrosion |
US1939421A (en) * | 1932-05-26 | 1933-12-12 | Aluminum Co Of America | Coating |
US2276353A (en) * | 1935-09-28 | 1942-03-17 | Parker Rust Proof Co | Process of coating |
US2348698A (en) * | 1940-08-03 | 1944-05-09 | Parker Rust Proof Co | Method of roller coating |
US2312855A (en) * | 1940-09-07 | 1943-03-02 | Parker Rust Proof Co | Method of coating aluminum |
US2357219A (en) * | 1942-01-10 | 1944-08-29 | Joseph P Moran | Corrosion-resistant ferrous alloys |
Cited By (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2957784A (en) * | 1958-09-18 | 1960-10-25 | Wolverine Fabricating & Mfg Co | Gasket material and method of producing the same |
US3066055A (en) * | 1958-11-10 | 1962-11-27 | Purex Corp Ltd | Process and composition for producing aluminum surface conversion coatings |
US3018211A (en) * | 1959-01-26 | 1962-01-23 | Purex Corp Ltd | Composition and process for brightening aluminum and its alloys |
US3113051A (en) * | 1961-09-29 | 1963-12-03 | Purex Corp Ltd | Process and composition for producing aluminum surface conversion coatings |
US3159509A (en) * | 1961-11-27 | 1964-12-01 | Okuno Chemical Industry Compan | Chromate process |
US3380858A (en) * | 1964-11-10 | 1968-04-30 | Hooker Chemical Corp | Chromate coating composition for aluminum and process |
US3494839A (en) * | 1967-01-23 | 1970-02-10 | Amchem Prod | Method of sealing chromic acid anodized aluminum surfaces |
US4111722A (en) * | 1976-02-09 | 1978-09-05 | Oxy Metal Industries Corporation | Tannin treatment of aluminum with a fluoride cleaner |
US4063969A (en) * | 1976-02-09 | 1977-12-20 | Oxy Metal Industries Corporation | Treating aluminum with tannin and lithium |
US4971636A (en) * | 1988-06-30 | 1990-11-20 | Nkk Corporation | Method of producing highly corrosion-resistant surface-treated steel plates |
US5401334A (en) * | 1990-11-14 | 1995-03-28 | Titeflex Corporation | Fluoropolymer aluminum laminate |
US5531841A (en) * | 1990-11-14 | 1996-07-02 | Titeflex Corporation | Fluoropolymer aluminum laminate |
US5123978A (en) * | 1991-03-19 | 1992-06-23 | The United States Of America As Represented By The Secretary Of The Navy | Corrosion resistant chromate conversion coatings for heat-treated aluminum alloys |
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Also Published As
Publication number | Publication date |
---|---|
DE977586C (en) | 1967-06-08 |
NL174337B (en) | |
GB737705A (en) | 1955-09-28 |
BE516894A (en) | |
NL201472A (en) | |
FR1075264A (en) | 1954-10-14 |
ES206946A1 (en) | 1953-02-01 |
CH314927A (en) | 1956-07-15 |
NL81501C (en) | |
NL83665C (en) |
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