FR2028235B1 - - Google Patents

Info

Publication number
FR2028235B1
FR2028235B1 FR707001094A FR7001094A FR2028235B1 FR 2028235 B1 FR2028235 B1 FR 2028235B1 FR 707001094 A FR707001094 A FR 707001094A FR 7001094 A FR7001094 A FR 7001094A FR 2028235 B1 FR2028235 B1 FR 2028235B1
Authority
FR
France
Prior art keywords
acid
lead
chromium
cro
jan
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
FR707001094A
Other languages
French (fr)
Other versions
FR2028235A1 (en
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
Publication of FR2028235A1 publication Critical patent/FR2028235A1/fr
Application granted granted Critical
Publication of FR2028235B1 publication Critical patent/FR2028235B1/fr
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
    • C25D9/00—Electrolytic coating other than with metals
    • C25D9/04—Electrolytic coating other than with metals with inorganic materials
    • C25D9/08—Electrolytic coating other than with metals with inorganic materials by cathodic processes
    • C25D9/10—Electrolytic coating other than with metals with inorganic materials by cathodic processes on iron or steel
    • 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

1,258,021. Electro-depositing Cr and hydrated Cr oxide. NIPPON KOKAN K. K. Jan. 2, 1970 [Jan. 13, 1969], No. 181/70. Heading C7B. A duplex layer of metallic chromium and hydrated chromium oxide is deposited on the surface of a steel plate by immersing the plate as a cathode in a chromium-containing electrolyte comprising chromic acid ions, one or more of thiocyanic acid, thiosulphuric acid, dithionous acid, sulphurous acid, thiosulphurous acid, pyrosulphurous acid, a salt of any of these acids or a sulphide as a first promoting agent, and one or more of hydrofluoric acid, hydrosilicofluoric acid, borofluoric acid or a salt of one of these acids as a second promoting agent. Preferably the concentration of chromic acid, expressed as CrO 3 , is 10-100 grams/litre and the concentrations of the two promoting agents are each from 1/500 to 1/25 of the weight of CrO 3 . The anode used may be of lead, lead-tin alloy or lead-antimony alloy, the temperature of the electrolyte 40-60‹ C. and the current density 10-45 amps/sq. dm.
FR707001094A 1969-01-13 1970-01-13 Expired FR2028235B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP206669 1969-01-13

Publications (2)

Publication Number Publication Date
FR2028235A1 FR2028235A1 (en) 1970-10-09
FR2028235B1 true FR2028235B1 (en) 1973-04-06

Family

ID=11518954

Family Applications (1)

Application Number Title Priority Date Filing Date
FR707001094A Expired FR2028235B1 (en) 1969-01-13 1970-01-13

Country Status (4)

Country Link
US (1) US3679554A (en)
DE (1) DE2001274C3 (en)
FR (1) FR2028235B1 (en)
GB (1) GB1258021A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062737A (en) * 1974-12-11 1977-12-13 International Business Machines Corporation Electrodeposition of chromium
JPS5425894B2 (en) * 1975-02-04 1979-08-31
US4141803A (en) * 1975-12-03 1979-02-27 International Business Machines Corporation Method and composition for electroplating chromium and its alloys and the method of manufacture of the composition
US4161432A (en) * 1975-12-03 1979-07-17 International Business Machines Corporation Electroplating chromium and its alloys
JPS55131198A (en) * 1979-03-30 1980-10-11 Toyo Kohan Co Ltd Electrolytic chromic acid treating steel sheet for adhesion can
FR2465011A1 (en) * 1979-09-06 1981-03-20 Carnaud Sa MATERIAL CONSISTING OF A PROTECTED STEEL SHEET, METHOD FOR MANUFACTURING SAME, AND APPLICATIONS THEREOF, IN PARTICULAR TO PRESERVE BOXES
DE3028587A1 (en) 1980-07-28 1982-03-04 Teksid S.p.A., Torino METHOD FOR PRODUCING A SPECIAL FINE SHEET FOR PERMANENT CAR BODIES AND A FINE SHEET PRODUCED THEREFORE
JPS6024399A (en) * 1983-07-20 1985-02-07 Kawasaki Steel Corp Production of tin-free steel plate having excellent adhesion to paint
JPS62124296A (en) * 1985-11-25 1987-06-05 Toyo Kohan Co Ltd Surface treated steel sheet having excellent seam weldability and paint adhesiveness and its production
JP2541269B2 (en) * 1987-08-27 1996-10-09 日本板硝子株式会社 Method of manufacturing oxide thin film
WO2014079910A1 (en) * 2012-11-21 2014-05-30 Tata Steel Ijmuiden B.V. Chromium-chromium oxide coatings applied to steel substrates for packaging applications and a method for producing said coatings

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296100A (en) * 1962-05-09 1967-01-03 Yawata Iron & Steel Co Process for producing anticorrosive surface treated steel sheets and product thereof
FR1382237A (en) * 1963-10-30 1964-12-18 Toyo Kohan Co Ltd Improvements to the processes for forming a protective coating on the surface of metals, to the electrolytes used for this purpose, and to the processes for the preparation of such electrolytes
GB1099836A (en) * 1965-07-12 1968-01-17 Toyo Kohan Co Ltd Process for treating electrolytically chromated metal surfaces
FR1543364A (en) * 1967-09-07 1968-10-25 Nippon Kokan Kk Anti-corrosive treatment of surfaces of iron and steel materials

Also Published As

Publication number Publication date
FR2028235A1 (en) 1970-10-09
DE2001274C3 (en) 1981-06-04
DE2001274B2 (en) 1980-10-16
GB1258021A (en) 1971-12-22
DE2001274A1 (en) 1970-07-30
US3679554A (en) 1972-07-25

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