GB915963A - Electrolytic treatment of ferrous metal surfaces - Google Patents

Electrolytic treatment of ferrous metal surfaces

Info

Publication number
GB915963A
GB915963A GB18127/59A GB1812759A GB915963A GB 915963 A GB915963 A GB 915963A GB 18127/59 A GB18127/59 A GB 18127/59A GB 1812759 A GB1812759 A GB 1812759A GB 915963 A GB915963 A GB 915963A
Authority
GB
United Kingdom
Prior art keywords
chromium
iron
phosphoric acid
chromic anhydride
steel
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
GB18127/59A
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.)
Yawata Iron and Steel Co Ltd
Original Assignee
Yawata Iron and Steel Co 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 Yawata Iron and Steel Co Ltd filed Critical Yawata Iron and Steel Co Ltd
Publication of GB915963A publication Critical patent/GB915963A/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

915,963. Protecting iron and steel surfaces electrolytically. YAWATA IRON & STEEL CO. Ltd. May 27, 1959 [May 30, 1958], No. 18127/59. Class 41. Iron and steel surfaces are protected and made corrosion resistant by cathodically treating with an electrolyte containing chromic anhydride, boric acid, phosphoric acid and a trivalent chromium ion which may be present as an added chromium salt, e.g. chromium acetate, or formed by adding a reducing agent, e.g. oxalic acid, which reacts with part of the chromic anhydride. It is stated that the coating includes chromium phosphate and chromium chromate. The preferred electrolyte contains per litre, 10 to 20 g. CrO 3 , 1 to 5 g. tri-valent Cr ions, 3 to 10 g. phosphoric acid and 1 to 20 g. H 3 BO 3 , and is used at 15 to 80‹ C., applying 10 to 300 A.S.F. for about 1 second. The surface is then allowed to drain, and dry.
GB18127/59A 1958-05-30 1959-05-27 Electrolytic treatment of ferrous metal surfaces Expired GB915963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1498158 1958-05-30

Publications (1)

Publication Number Publication Date
GB915963A true GB915963A (en) 1963-01-16

Family

ID=11876128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18127/59A Expired GB915963A (en) 1958-05-30 1959-05-27 Electrolytic treatment of ferrous metal surfaces

Country Status (3)

Country Link
US (1) US3032487A (en)
DE (1) DE1228118B (en)
GB (1) GB915963A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257295A (en) * 1962-01-20 1966-06-21 Yawata Iron & Steel Co Method of chemically treating metals
US3296100A (en) * 1962-05-09 1967-01-03 Yawata Iron & Steel Co Process for producing anticorrosive surface treated steel sheets and product thereof
GB1044962A (en) * 1962-06-13 1966-10-05 Yawata Iron & Steel Co Producing a protective coating on metal by cathodic coating
NL129365C (en) * 1962-11-10
US3278401A (en) * 1966-01-12 1966-10-11 Nat Steel Corp Method of treating tin-containing surfaces
US3479162A (en) * 1966-03-28 1969-11-18 Fuji Iron & Steel Co Ltd Chromium plated steel sheet having an almost colorless and transparent chromate film
GB1531056A (en) * 1976-06-01 1978-11-01 Bnf Metals Tech Centre Electrolytic production of chromium conversion coatings
GB1580137A (en) * 1977-05-24 1980-11-26 Bnf Metals Tech Centre Electrolytic deposition of protective chromite-containing coatings
US4617095A (en) * 1985-06-24 1986-10-14 Omi International Corporation Electrolytic post treatment of chromium substrates
US5085745A (en) * 1990-11-07 1992-02-04 Liquid Carbonic Corporation Method for treating carbon steel cylinder
EP1712524A4 (en) * 2003-12-10 2010-09-01 Nippon Chemical Ind Company Lt Aqueous solution of chromium salt and method for producing same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733199A (en) * 1956-01-31 Electrolytic treatment of metal
US2780592A (en) * 1951-08-22 1957-02-05 Bethlehem Steel Corp Electrolytic treatment of metal surfaces
US2769774A (en) * 1952-08-05 1956-11-06 Republic Steel Corp Electrodeposition method
US2812297A (en) * 1953-03-13 1957-11-05 Metal & Thermit Corp Method of preventing etching by chromic acid chromium plating baths
FR1080914A (en) * 1953-06-16 1954-12-14 United States Steel Corp Electrochemical process for coating steel surfaces, products intended for its implementation and resulting products

Also Published As

Publication number Publication date
US3032487A (en) 1962-05-01
DE1228118B (en) 1966-11-03

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