GB1182318A - Improvements in or relating to Chromium Coatings - Google Patents

Improvements in or relating to Chromium Coatings

Info

Publication number
GB1182318A
GB1182318A GB5781667A GB5781667A GB1182318A GB 1182318 A GB1182318 A GB 1182318A GB 5781667 A GB5781667 A GB 5781667A GB 5781667 A GB5781667 A GB 5781667A GB 1182318 A GB1182318 A GB 1182318A
Authority
GB
United Kingdom
Prior art keywords
secs
pickled
minute
air
relating
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
GB5781667A
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.)
Fried Krupp AG Hoesch Krupp
Original Assignee
Hoesch AG
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 Hoesch AG filed Critical Hoesch AG
Publication of GB1182318A publication Critical patent/GB1182318A/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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

1,182,318. Electrolytic chromium coating. HOESCH A.G. Dec.20, 1967 [Jan. 31, 1967], No.57816/67. Heading C7B. A steel surface is cleaned and pickled, electrolytically coated with Cr and then maintained in air for less than 1 minute at 150 to 300‹ C. For example, strips of sheet steel are electrolytically degreased as cathodes in a 4% alkaline orthosilicate solution at 80‹ C. using 8A/dm<SP>2</SP> for 1 minute, pickled in aqueous HC1 solution, electro-plated in a bath of composition 250 g/1 CrO 3 and 3 g/1 Cr 2 (S0 4 ) 3 at 20‹C. using 30A/dm<SP>2</SP> for 10 secs. and then heated in air at 210‹ C. for 4, 8, 12, 16 and 20 secs. respectively. Inductive or resistance heating may be employed especially in continuously operating apparatus. The Specification refers to Specification 939,136.
GB5781667A 1967-01-31 1967-12-20 Improvements in or relating to Chromium Coatings Expired GB1182318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0061704 1967-01-31

Publications (1)

Publication Number Publication Date
GB1182318A true GB1182318A (en) 1970-02-25

Family

ID=7161517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5781667A Expired GB1182318A (en) 1967-01-31 1967-12-20 Improvements in or relating to Chromium Coatings

Country Status (6)

Country Link
AT (1) AT279990B (en)
BE (1) BE710068A (en)
FR (1) FR1553310A (en)
GB (1) GB1182318A (en)
NL (1) NL6801388A (en)
SE (1) SE344970B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT350869B (en) * 1977-06-28 1979-06-25 Voest Ag METHOD FOR PROTECTING CHROME-PLATED SURFACES

Also Published As

Publication number Publication date
AT279990B (en) 1970-03-25
SE344970B (en) 1972-05-08
NL6801388A (en) 1968-08-01
BE710068A (en) 1968-07-29
FR1553310A (en) 1969-01-10

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees