GB1333714A - Aqueous chromium plating baths - Google Patents

Aqueous chromium plating baths

Info

Publication number
GB1333714A
GB1333714A GB1333714DA GB1333714A GB 1333714 A GB1333714 A GB 1333714A GB 1333714D A GB1333714D A GB 1333714DA GB 1333714 A GB1333714 A GB 1333714A
Authority
GB
United Kingdom
Prior art keywords
bath
plating
ion
chromium
amido
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
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.)
British Non Ferrous Metals Research Association
Original Assignee
British Non Ferrous Metals Research Association
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 British Non Ferrous Metals Research Association filed Critical British Non Ferrous Metals Research Association
Publication of GB1333714A publication Critical patent/GB1333714A/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
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium

Landscapes

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

Abstract

1333714 Electro-plating with chromium BRITISH NON-FERROUS METALS RESEARCH ASSOCIATION 29 Dec 1970 [29 Dec 1969] 63140/69 Heading C7B Chromium is electro-plated (e.g. on to a steel bearing surface) from an aqueous trivalent chromium sulphate plating bath having a pH of from 1À6 to 3À0 and containing:- chromic ion, ammonium ion at least 1À0M, an aprotic amido buffer at least 1 ml/l, and sulphate ion at least equivalent to the chromic ion, in the absence of added halide ion. An aprotic amido buffer has at least one amido group with no hydrogen atom directly attached to any amido nitrogen atom. The source of chromic ion may be Cr 2 (SO 4 ) 3 . (NH 4 ) 2 SO 4 . 24H 2 O. The aprotic buffer may be tetramethyl urea, dimethyl acetamide or dimethyl formamide. The bath may also contain H 3 BO 3 and octan-1-ol. Optional conditions are:- a carbon or platinized Ti anode, separation of anolyte and catholyte by a porous diaphragm continuous filtration of the electrolyte through a submicron filter, air agitation of the bath during plating, a bath temperature of 25-60‹C., a plating current density of 300-5000 A/m<SP>2</SP> and a voltage of 6-20v with a 10cm anode-cathode separation. Details are given of making up and filtering the bath and of electroplating out foreign metal ions at 500 A/m<SP>2</SP> before using the bath for electro-plating with chromium.
GB1333714D 1969-12-29 1970-12-29 Aqueous chromium plating baths Expired GB1333714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6314069 1969-12-29

Publications (1)

Publication Number Publication Date
GB1333714A true GB1333714A (en) 1973-10-17

Family

ID=10488807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1333714D Expired GB1333714A (en) 1969-12-29 1970-12-29 Aqueous chromium plating baths

Country Status (6)

Country Link
AU (1) AU2348470A (en)
BE (1) BE760886A (en)
DE (1) DE2063991A1 (en)
FR (1) FR2072091A1 (en)
GB (1) GB1333714A (en)
NL (1) NL7018695A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847961A1 (en) * 1977-01-26 1979-05-17 Ibm CHROME SOURCE FOR ELECTROPLATING, THEIR PRODUCTION AND USE
US4374007A (en) * 1980-03-10 1983-02-15 International Business Machines Corporation Trivalent chromium electroplating solution and process
WO2014079911A2 (en) 2012-11-21 2014-05-30 Tata Steel Ijmuiden B.V. Method for electrodeposition of chromium containing coatings from trivalent chromium based electrolytes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368749A (en) * 1971-09-30 1974-10-02 British Non Ferrous Metals Res Electrodeposition of chromium

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704273A (en) * 1951-09-28 1955-03-15 Yoshida Tadashi Process for chromium electrodeposition
US2822326A (en) * 1955-03-22 1958-02-04 Rockwell Spring & Axle Co Bright chromium alloy plating
GB1144913A (en) * 1966-10-31 1969-03-12 British Non Ferrous Metals Res Electrodeposition of chromium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847961A1 (en) * 1977-01-26 1979-05-17 Ibm CHROME SOURCE FOR ELECTROPLATING, THEIR PRODUCTION AND USE
US4374007A (en) * 1980-03-10 1983-02-15 International Business Machines Corporation Trivalent chromium electroplating solution and process
WO2014079911A2 (en) 2012-11-21 2014-05-30 Tata Steel Ijmuiden B.V. Method for electrodeposition of chromium containing coatings from trivalent chromium based electrolytes

Also Published As

Publication number Publication date
DE2063991A1 (en) 1971-07-08
FR2072091A1 (en) 1971-09-24
NL7018695A (en) 1971-07-01
BE760886A (en) 1971-05-27
AU2348470A (en) 1972-07-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee