GB745676A - Electrochemical method for coating steel surfaces and the product thereof - Google Patents

Electrochemical method for coating steel surfaces and the product thereof

Info

Publication number
GB745676A
GB745676A GB1663753A GB1663753A GB745676A GB 745676 A GB745676 A GB 745676A GB 1663753 A GB1663753 A GB 1663753A GB 1663753 A GB1663753 A GB 1663753A GB 745676 A GB745676 A GB 745676A
Authority
GB
United Kingdom
Prior art keywords
solution
per cent
weight
chromium
strip
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
GB1663753A
Inventor
Richard Armstrong Neish
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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
Priority to FR1080914D priority Critical patent/FR1080914A/en
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to GB1663753A priority patent/GB745676A/en
Priority to DEU2239A priority patent/DE1004012B/en
Priority to BE521089D priority patent/BE521089A/xx
Publication of GB745676A publication Critical patent/GB745676A/en
Priority to US593217A priority patent/US2812296A/en
Priority to DEU4079A priority patent/DE1040871B/en
Priority to GB27373/56A priority patent/GB825862A/en
Priority to FR70572D priority patent/FR70572E/en
Priority to BE551710D priority patent/BE551710A/xx
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
    • C25D11/36—Phosphatising
    • 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)
  • Chemical Treatment Of Metals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Ferrous articles are treated by passing them through an aqueous solution having a pH of 1 to 2 and containing 1,2 to 4,8 per cent by weight of phosphate radical and 0,3 to 1,5 per cent by weight of chromium in the form of ions of a chromium compound in which the chromium is hexavalent, maintaining the solution at a temperature between 100 DEG and 160 DEG F., the articles being treated electrolytically as cathodes, and then removing them from the solution and drying the film of solution adhering thereto. Steel strip is passed by means of rollers through a bath containing the solution and provided with anodes, the strip being connected as cathode by means of the rollers. On leaving the bath it passes between squeegee rolls to remove excess solution, and then through a hot air drier, after which it is cut into sheets which are lacquered, enamelled or painted. The solution may contain phosphoric acid, or sodium, potassium or ammonium phosphate, and chromic acid or a soluble dichromate such as sodium dichromate. If neither phosphoric or chromic acids are used the acidity may be obtained by the addition of nitric acid. The solution may also contain 1 to 4 per cent by weight of sodium nitrate or 0,1 to p 0,4 per cent by weight potassium permanganate. The strip is immersed for a time of 0,25 to 2 seconds.
GB1663753A 1953-06-16 1953-06-16 Electrochemical method for coating steel surfaces and the product thereof Expired GB745676A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR1080914D FR1080914A (en) 1953-06-16 Electrochemical process for coating steel surfaces, products intended for its implementation and resulting products
GB1663753A GB745676A (en) 1953-06-16 1953-06-16 Electrochemical method for coating steel surfaces and the product thereof
DEU2239A DE1004012B (en) 1953-06-16 1953-06-22 Process for the continuous electrolytic phosphating of steel products
BE521089D BE521089A (en) 1953-06-16 1953-06-30
US593217A US2812296A (en) 1953-06-16 1956-06-22 Electrochemical method for coating steel surfaces and the product thereof
DEU4079A DE1040871B (en) 1953-06-16 1956-08-20 Process for the continuous electrolytic phosphating of steel products
GB27373/56A GB825862A (en) 1953-06-16 1956-09-06 Electrochemical method for coating steel surfaces and the product thereof
FR70572D FR70572E (en) 1953-06-16 1956-10-08 Electrochemical process for coating steel surfaces, products intended for its implementation and resulting products
BE551710D BE551710A (en) 1953-06-16 1956-10-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1663753A GB745676A (en) 1953-06-16 1953-06-16 Electrochemical method for coating steel surfaces and the product thereof

Publications (1)

Publication Number Publication Date
GB745676A true GB745676A (en) 1956-02-29

Family

ID=10080904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1663753A Expired GB745676A (en) 1953-06-16 1953-06-16 Electrochemical method for coating steel surfaces and the product thereof

Country Status (1)

Country Link
GB (1) GB745676A (en)

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