GB1436150A - Electrolytic treatment of chromium containing alloys and electrolytes for use therein - Google Patents

Electrolytic treatment of chromium containing alloys and electrolytes for use therein

Info

Publication number
GB1436150A
GB1436150A GB5911073*A GB5911073A GB1436150A GB 1436150 A GB1436150 A GB 1436150A GB 5911073 A GB5911073 A GB 5911073A GB 1436150 A GB1436150 A GB 1436150A
Authority
GB
United Kingdom
Prior art keywords
chromium containing
alloy
electrolytes
film
oct
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
GB5911073*A
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.)
Inco Ltd
Original Assignee
Inco 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 Inco Ltd filed Critical Inco Ltd
Priority to GB5911073*A priority Critical patent/GB1436150A/en
Priority claimed from GB4704872A external-priority patent/GB1435518A/en
Publication of GB1436150A publication Critical patent/GB1436150A/en
Priority to HK70776A priority patent/HK70776A/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

1436150 Electrolytically hardening a film formed on a chromium containing iron alloy INTERNATIONAL NICKEL Ltd 9 Oct 1973 [12 Oct 1972] 59110/73 Divided out of 1435518 Addition to 1305636 Headings C7B and C7U The hardness of a porous film, formed on the surface of a Cr-Fe alloy by treatment in aqueous chromic and sulphuric acids, is increased by cathodic treatment in a bath containing aqueous chromic acid and HF at a c.d. # 1A/dm<SP>2</SP> for a time sufficient to harden the film but not so long that any Cr becomes visible as a white deposit. The molar ratio of chromic acid: F may be 20-50:1 with a maximum current amount of 3A-min/dm<SP>2</SP> at 20‹C. The alloy treated may contain 18-20% Cr and 8-12% Ni.
GB5911073*A 1970-05-26 1972-10-12 Electrolytic treatment of chromium containing alloys and electrolytes for use therein Expired GB1436150A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5911073*A GB1436150A (en) 1970-05-26 1972-10-12 Electrolytic treatment of chromium containing alloys and electrolytes for use therein
HK70776A HK70776A (en) 1972-10-12 1976-11-11 Electrolytic treatment of chromium containing alloys and electrolytes for use therein

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB2521570 1970-05-26
GB124571 1971-01-11
GB5911073*A GB1436150A (en) 1970-05-26 1972-10-12 Electrolytic treatment of chromium containing alloys and electrolytes for use therein
GB4704872A GB1435518A (en) 1972-10-12 1972-10-12 Electrolytic treatment of chromium-containing alloys and electro lytes for use therein

Publications (1)

Publication Number Publication Date
GB1436150A true GB1436150A (en) 1976-05-19

Family

ID=27447142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5911073*A Expired GB1436150A (en) 1970-05-26 1972-10-12 Electrolytic treatment of chromium containing alloys and electrolytes for use therein

Country Status (1)

Country Link
GB (1) GB1436150A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121817A1 (en) * 1983-03-15 1984-10-17 Kawasaki Steel Corporation Method for producing tin-free steel sheets having improved lacquer adhesion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121817A1 (en) * 1983-03-15 1984-10-17 Kawasaki Steel Corporation Method for producing tin-free steel sheets having improved lacquer adhesion

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Legal Events

Date Code Title Description
PS Patent sealed