GB534471A - Improvements in or relating to the production of protective coatings on magnesium and magnesium alloys - Google Patents

Improvements in or relating to the production of protective coatings on magnesium and magnesium alloys

Info

Publication number
GB534471A
GB534471A GB24062/39A GB2406239A GB534471A GB 534471 A GB534471 A GB 534471A GB 24062/39 A GB24062/39 A GB 24062/39A GB 2406239 A GB2406239 A GB 2406239A GB 534471 A GB534471 A GB 534471A
Authority
GB
United Kingdom
Prior art keywords
magnesium
solution
per cent
alloys
article
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
Application number
GB24062/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB534471A publication Critical patent/GB534471A/en
Expired legal-status Critical Current

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
    • C23C22/78—Pretreatment of the material to be coated
    • 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
    • C25D11/30—Anodisation of magnesium or alloys based thereon

Abstract

534,471. Coating magnesium and its alloys; electrolysis. DOW CHEMICAL CO. Aug. 21, 1939, No. 24062. Convention date. Nov. 14, 1938. [Class 82 (ii) [Also in Group XXXVI] To produce a protective coating on an article of magnesium or its alloys, the alloy article is first treated with a solution containing a soluble fluoride and then with the alkali or ammonium salt of the oxy-acid of an element selected from the group consisting of chromium, phosphorus, molybdenum, selenium, titanium, tungsten and vanadium. The treatment may be carried out electrolytically, the article forming the anode. In an example, a casting of a magnesium alloy containing 6 per cent. of aluminium, 3 of zinc and 0.1 of manganese was cleaned by a short dip into a solution containing nitric and sulphuric acids immersed for 5 minutes in a 15 per cent. solution of hydro-fluoric acid and then rinsed in cold water. The casting was then immersed in a boiling 10 per cent.' solution of sodium dichromate and rinsed in cold water and dried. Instead of the solution of the salt, a molten bath may be used.
GB24062/39A 1938-11-14 1939-08-21 Improvements in or relating to the production of protective coatings on magnesium and magnesium alloys Expired GB534471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US240345A US2322208A (en) 1938-11-14 1938-11-14 Method of providing a protective coating on magnesium and its alloys

Publications (1)

Publication Number Publication Date
GB534471A true GB534471A (en) 1941-03-07

Family

ID=22906156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24062/39A Expired GB534471A (en) 1938-11-14 1939-08-21 Improvements in or relating to the production of protective coatings on magnesium and magnesium alloys

Country Status (2)

Country Link
US (1) US2322208A (en)
GB (1) GB534471A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864732A (en) * 1953-10-05 1958-12-16 Battelle Development Corp Method of coating titanium articles and product thereof

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522474A (en) * 1942-07-02 1950-09-12 Battelle Memorial Institute Treatment of zinc surfaces
US2438740A (en) * 1944-03-27 1948-03-30 Canadian Copper Refiners Ltd Method of protecting the surface of articles formed from a magnesium alloy
US2758963A (en) * 1945-03-24 1956-08-14 Kahn Milton Electrodeposition of plutonium fluoride
BE516894A (en) * 1952-04-03
US2816051A (en) * 1954-05-07 1957-12-10 Little Inc A Corrosion inhibiting composition for coating metal, coated metal and method of coating
US2933422A (en) * 1957-05-31 1960-04-19 Walter A Mason Product and method for coating metals with copper-tellurium compound
US2955061A (en) * 1957-08-02 1960-10-04 Parker Rust Proof Co Fluoride coating on zirconium
US3066055A (en) * 1958-11-10 1962-11-27 Purex Corp Ltd Process and composition for producing aluminum surface conversion coatings
JP2001288580A (en) * 2000-03-31 2001-10-19 Nippon Parkerizing Co Ltd Surface treating method for magnesium alloy and magnesium alloy member
US20030213771A1 (en) * 2000-03-31 2003-11-20 Kenichirou Ohshita Surface treatment method for magnesium alloys and magnesium alloy members thus treated
GB2469115B (en) 2009-04-03 2013-08-21 Keronite Internat Ltd Process for the enhanced corrosion protection of valve metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864732A (en) * 1953-10-05 1958-12-16 Battelle Development Corp Method of coating titanium articles and product thereof

Also Published As

Publication number Publication date
US2322208A (en) 1943-06-22

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