GB1168685A - An Electrolytic Anti-Corrosion Treatment for Iron and Steel. - Google Patents

An Electrolytic Anti-Corrosion Treatment for Iron and Steel.

Info

Publication number
GB1168685A
GB1168685A GB4066267A GB4066267A GB1168685A GB 1168685 A GB1168685 A GB 1168685A GB 4066267 A GB4066267 A GB 4066267A GB 4066267 A GB4066267 A GB 4066267A GB 1168685 A GB1168685 A GB 1168685A
Authority
GB
United Kingdom
Prior art keywords
iron
steel
corrosion treatment
compound
corrosion
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
GB4066267A
Inventor
Hidehisa Yamagishi
Masao Takeuchi
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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Priority to GB4066267A priority Critical patent/GB1168685A/en
Publication of GB1168685A publication Critical patent/GB1168685A/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
    • C25D11/38—Chromatising

Abstract

1,168,685. Electrolytic anti-corrosion treatment for iron or steel. NIPPON KOKAN K. K. Sept.6, 1967, No. 40662/67. Heading C7B. An anti-corrosion surface treatment for iron or steel comprises electrolytically reducing an aqueous solution containing a hexavalent chromium compound and a thiocyanate compound using the iron or steel as the cathode to form a coating layer containing hydrated trivalent chromium oxide on the iron or steel surface. The solution may contain 20-300 g Cro 3 per litre and ammonium, sodium or potassium thiocyanate in a concentration from 0À02 to 0À005 that of the Cr compound. Temperatures of 45-60‹C may be used. Prior to the anti-corrosion treatment, the iron or steel may be electrolytically degreased in an alkaline aqueous solution, water washed, electrolytically pickled in H 2 SO 4 and water washed. After the anti-corrosion treatment, the surface may be coated with a paint, e.g. one based on melamine resin.
GB4066267A 1967-09-06 1967-09-06 An Electrolytic Anti-Corrosion Treatment for Iron and Steel. Expired GB1168685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4066267A GB1168685A (en) 1967-09-06 1967-09-06 An Electrolytic Anti-Corrosion Treatment for Iron and Steel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4066267A GB1168685A (en) 1967-09-06 1967-09-06 An Electrolytic Anti-Corrosion Treatment for Iron and Steel.

Publications (1)

Publication Number Publication Date
GB1168685A true GB1168685A (en) 1969-10-29

Family

ID=10416008

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4066267A Expired GB1168685A (en) 1967-09-06 1967-09-06 An Electrolytic Anti-Corrosion Treatment for Iron and Steel.

Country Status (1)

Country Link
GB (1) GB1168685A (en)

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