GB1036400A - Surface treatment of an oxide coated metal article - Google Patents
Surface treatment of an oxide coated metal articleInfo
- Publication number
- GB1036400A GB1036400A GB10204/65A GB1020465A GB1036400A GB 1036400 A GB1036400 A GB 1036400A GB 10204/65 A GB10204/65 A GB 10204/65A GB 1020465 A GB1020465 A GB 1020465A GB 1036400 A GB1036400 A GB 1036400A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bath
- temperature
- fatty
- coated metal
- sodium
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/20—Electrolytic after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
A method of improving the corrosion resistance of oxidized metal surfaces characterized by the steps of (A) immersing the oxide coated metal in a bath of a soluble amphipathic material, i.e. a material having molecules which are highly polar and water solubility-enhancing in one portion of the molecule and are non-polar and insolubility-enhancing in another, and (B) passing an electric current at a potential of at least 2 volts through said bath between an inert cathode and said oxide coated metal as an anode, said bath being maintained at a temperature of 50-150 DEG C. Amphipathic materials which may be used include saturated or unsaturated water soluble fatty acid salts, e.g. fatty carboxylates; anionic surfactants, e.g. alkyl, aryl or alkylaryl sulphonates, phosphonates &c. and cationic surfactants, e.g. fatty amines and fatty aminium salts; the preferred materials being sodium stearate, sodium oleate, sodium laurate, potassium ricinoleate and sodium lauroyl sarcosinate. The thickness of the oxide coating should be at least 0.01 mil thick, the electrolyte is preferably at a temperature of 70 DEG -100 DEG C., the voltage 70-120 V and time of electrolysis from 30 seconds to 60 minutes. Prior to this treatment the oxide coating may be treated with water at a temperature within 10 DEG F. of its boiling point, with a metal hydroxide solution of pH at least 8 and temperature 0-100 DEG C., or an acidic solution having a pH of 3 or less. The bath may contain the amphipathic material in a proportion from 0.0001% to saturation, and preferably from 0.01 to 1.0%.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US354162A US3351540A (en) | 1964-03-23 | 1964-03-23 | Method of improving the corrosion resistance of oxidized metal surfaces |
US47024865A | 1965-07-07 | 1965-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1036400A true GB1036400A (en) | 1966-07-20 |
Family
ID=26998275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10204/65A Expired GB1036400A (en) | 1964-03-23 | 1965-03-10 | Surface treatment of an oxide coated metal article |
Country Status (3)
Country | Link |
---|---|
US (2) | US3351540A (en) |
DE (1) | DE1496947A1 (en) |
GB (1) | GB1036400A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3734784A (en) * | 1970-01-14 | 1973-05-22 | S Bereday | Treating aluminum surfaces |
US3676309A (en) * | 1970-02-04 | 1972-07-11 | Olin Mathieson | Aluminum welding wire electrode with an alumina coating containing phosphate |
DE2042789C3 (en) * | 1970-08-28 | 1975-10-30 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Method of incorporating foreign matter into alumina dielectric layers |
US3902976A (en) * | 1974-10-01 | 1975-09-02 | S O Litho Corp | Corrosion and abrasion resistant aluminum and aluminum alloy plates particularly useful as support members for photolithographic plates and the like |
US4111763A (en) * | 1977-07-18 | 1978-09-05 | Swiss Aluminium Ltd. | Process for improving corrosion resistant characteristics of chrome plated aluminum and aluminum alloys |
JP4226002B2 (en) * | 2005-12-27 | 2009-02-18 | ルビコン株式会社 | Manufacturing method of multilayer film capacitor |
DE102014222240A1 (en) * | 2014-10-30 | 2016-05-04 | Continental Automotive Gmbh | Valve device for a motor vehicle |
CN111926363B (en) * | 2020-08-05 | 2022-06-28 | 上海电力大学 | Environment-friendly long-acting durable aluminum alloy surface treatment process |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2080299A (en) * | 1935-04-12 | 1937-05-11 | Du Pont | Inhibiting corrosion of metals |
DE656566C (en) * | 1935-11-01 | 1938-02-09 | Siemens & Halske Akt Ges | Process for pore filling of protective oxide layers on aluminum and its alloys and other suitable metals |
US2262967A (en) * | 1936-07-13 | 1941-11-18 | Firm Ematal Electrochemical Co | Process for the production of opaque enamellike, hard, and protective coatings on articles of aluminum and its alloys |
CH220502A (en) * | 1941-01-31 | 1942-04-15 | Chem Ind Basel | Process for the aftertreatment of anoxidized aluminum and its alloys. |
FR907180A (en) * | 1944-09-22 | 1946-03-05 | Trefileries Laminoirs Havre Sa | Process for increasing the corrosion resistance of light alloy objects coated with a layer of alumina obtained by electrolytic means |
US2469237A (en) * | 1945-10-25 | 1949-05-03 | Reynolds Metals Company Inc | Electrolytic sealing of anodized aluminum surfaces |
US2515934A (en) * | 1947-12-17 | 1950-07-18 | Lite Chemical Corp Du | Phosphate coating of metal articles |
US2776918A (en) * | 1952-07-21 | 1957-01-08 | Dow Chemical Co | Method and composition for application of protective chelate-containing coating to surfaces and article formed thereby |
US2755239A (en) * | 1953-03-18 | 1956-07-17 | Geigy Ag J R | Sealing baths |
US3012917A (en) * | 1957-03-26 | 1961-12-12 | Pechiney Prod Chimiques Sa | Method of protecting metal surfaces |
US3016339A (en) * | 1957-04-12 | 1962-01-09 | Pechiney Prod Chimiques Sa | Method of protecting metal surfaces |
FR1246106A (en) * | 1957-04-12 | 1960-11-18 | Pechiney Prod Chimiques Sa | Protection of metal surfaces |
US3120695A (en) * | 1957-11-18 | 1964-02-11 | Burnham John | Electrolytic capacitors |
NL259610A (en) * | 1959-12-30 | |||
US3100728A (en) * | 1960-03-21 | 1963-08-13 | Hooker Chemical Corp | Process and composition for phosphatizing metals |
US3230162A (en) * | 1963-08-14 | 1966-01-18 | Ford Motor Co | Electropainting process and paint binder concentrate composition therefor |
NL121366C (en) * | 1962-06-16 | |||
US3260622A (en) * | 1962-09-05 | 1966-07-12 | Lubrizol Corp | Organic phosphate complexes |
US3345544A (en) * | 1965-05-17 | 1967-10-03 | Mallory & Co Inc P R | Solid aluminum capacitors having a proted dielectric oxide film |
-
1964
- 1964-03-23 US US354162A patent/US3351540A/en not_active Expired - Lifetime
-
1965
- 1965-03-10 GB GB10204/65A patent/GB1036400A/en not_active Expired
- 1965-03-19 DE DE19651496947 patent/DE1496947A1/en active Pending
- 1965-07-07 US US470248A patent/US3531381A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3351540A (en) | 1967-11-07 |
US3531381A (en) | 1970-09-29 |
DE1496947A1 (en) | 1970-03-19 |
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