GB966421A - Improvements in and relating to corrosion-resistant surface coatings on ferrous metals - Google Patents

Improvements in and relating to corrosion-resistant surface coatings on ferrous metals

Info

Publication number
GB966421A
GB966421A GB8332/62A GB833262A GB966421A GB 966421 A GB966421 A GB 966421A GB 8332/62 A GB8332/62 A GB 8332/62A GB 833262 A GB833262 A GB 833262A GB 966421 A GB966421 A GB 966421A
Authority
GB
United Kingdom
Prior art keywords
barium
corrosion
relating
ferrous metals
surface coatings
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
GB8332/62A
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of GB966421A publication Critical patent/GB966421A/en
Expired legal-status Critical Current

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

Abstract

Iron and steel surfaces are given a corrosion-resistant coating of barium ferrate, electrolytically, by immersing the surface as anode in an alkaline solution of a barium salt or barium hydroxide and applying at least 2 A.S.F. at 1.4 V. or more. The electrolyte is maintained at pH 12.5, by adding NaOH or KOH of 0.5-7.5 N to the barium hydroxide electrolyte. The coating of barium ferrate is preferably then treated with a dilute sodium dichromate. Barium salts used as starting materials are acetate, nitrate, chloride, or the oxide or hydroxide itself. The inert cathode may be carbon or platinum. U.S.A. Specification 2,850,416 is referred to.
GB8332/62A 1961-04-24 1962-03-05 Improvements in and relating to corrosion-resistant surface coatings on ferrous metals Expired GB966421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US104780A US3206384A (en) 1961-04-24 1961-04-24 Process for producing corrosion resistant coating of barium ferrate on ferrous metals

Publications (1)

Publication Number Publication Date
GB966421A true GB966421A (en) 1964-08-12

Family

ID=22302336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8332/62A Expired GB966421A (en) 1961-04-24 1962-03-05 Improvements in and relating to corrosion-resistant surface coatings on ferrous metals

Country Status (4)

Country Link
US (1) US3206384A (en)
GB (1) GB966421A (en)
LU (1) LU41534A1 (en)
NL (1) NL277578A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290457A (en) * 1963-10-21 1966-12-06 Ii William M Poschman Electric distribution box with circuit breaker and timer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE692124C (en) * 1939-03-10 1940-06-13 Langbein Pfanhauser Werke Akt Process for the electrolytic oxidation of iron and steel

Also Published As

Publication number Publication date
US3206384A (en) 1965-09-14
LU41534A1 (en) 1962-06-12
NL277578A (en)

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