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GB1076392A - Process for treating electrolytically chromated metal surfaces - Google Patents

Process for treating electrolytically chromated metal surfaces

Info

Publication number
GB1076392A
GB1076392A GB27339/65A GB2733965A GB1076392A GB 1076392 A GB1076392 A GB 1076392A GB 27339/65 A GB27339/65 A GB 27339/65A GB 2733965 A GB2733965 A GB 2733965A GB 1076392 A GB1076392 A GB 1076392A
Authority
GB
United Kingdom
Prior art keywords
amines
metal
examples
treating
treatment
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
GB27339/65A
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.)
Toyo Kohan Co Ltd
Original Assignee
Toyo Kohan 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 Toyo Kohan Co Ltd filed Critical Toyo Kohan Co Ltd
Publication of GB1076392A publication Critical patent/GB1076392A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

The electrolytic deposit of hydrated chromium oxide formed by deposition from a chromic acid electrolyte on a metal surface is made corrosion resistant by treating the still wet coated metal after rinsing in an aqueous solution containing a total of 1 to 100 grams per litre of at least one water soluble compound selected from alkanol amines, alkyl amines, aromatic amines, polyalkylene polyamines, hydrazine and its alkyl derivatives and alkali metal salts of amino-carboxylic acids. The metal is rinsed and then dried. Preferably the treatment solution is at 30 to 70 DEG C. and immersion lasts for 1 to 60 seconds. The treatment may be applied to iron, steel, aluminium, chromium, nickel, zinc, tin and their alloys. Examples of chromating bath compositions and conditions and examples of suitable amine compounds and immersion baths are given.
GB27339/65A 1964-07-13 1965-06-28 Process for treating electrolytically chromated metal surfaces Expired GB1076392A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3919264 1964-07-13

Publications (1)

Publication Number Publication Date
GB1076392A true GB1076392A (en) 1967-07-19

Family

ID=12546237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27339/65A Expired GB1076392A (en) 1964-07-13 1965-06-28 Process for treating electrolytically chromated metal surfaces

Country Status (3)

Country Link
US (1) US3484343A (en)
DE (1) DE1521045B1 (en)
GB (1) GB1076392A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853593A (en) * 1971-07-31 1974-12-10 Centro Speriment Metallurg Process for improving the protective properties of chromium-oxide based compound coatings, by means of stabilization of the chromium ion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333206A (en) * 1939-05-13 1943-11-02 Du Pont Protection of ferrous metals against corrosion
US3012917A (en) * 1957-03-26 1961-12-12 Pechiney Prod Chimiques Sa Method of protecting metal surfaces
NL132197C (en) * 1959-12-30
NL275534A (en) * 1961-03-15
DE1521892B1 (en) * 1962-07-27 1970-10-01 Ngk Insulators Ltd Solution for the formation of a corrosion-resistant chromate-containing coating on metals
NL129365C (en) * 1962-11-10
US3296106A (en) * 1966-01-12 1967-01-03 Nat Steel Corp Method of cathodically treating metallic surfaces

Also Published As

Publication number Publication date
DE1521045B1 (en) 1971-06-09
US3484343A (en) 1969-12-16

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