GB948739A - Chromium plating process - Google Patents

Chromium plating process

Info

Publication number
GB948739A
GB948739A GB18317/60A GB1831760A GB948739A GB 948739 A GB948739 A GB 948739A GB 18317/60 A GB18317/60 A GB 18317/60A GB 1831760 A GB1831760 A GB 1831760A GB 948739 A GB948739 A GB 948739A
Authority
GB
United Kingdom
Prior art keywords
ions
cro3
plating
per
coating
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
GB18317/60A
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.)
Primerica Inc
Original Assignee
Metal and Thermit 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
Application filed by Metal and Thermit Corp filed Critical Metal and Thermit Corp
Publication of GB948739A publication Critical patent/GB948739A/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
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • 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
    • 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
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/625—Discontinuous layers, e.g. microcracked layers
    • 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
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance

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)
  • Chemically Coating (AREA)

Abstract

Iron, steel or other basis metals with or without pre-coat platings of Cu or Ni, are given a double plating of Cr in which the first plating is effected with a chromic acid bath containing both fluoride and sulphate ions, containing 150 g. to 525 g. CrO3 per litre, and ratio by weight CrO3 to F and SO4 ions being 110:1 to 175:1, and at 32-60 DEG C., and in the second plating a similar bath is used in which ratio CrO3 to F and SO4 ions is 50:1 to 100:1, whereby the top coating has fine cracks on the surface, at least 10 per cm. and preferably 40 per cm. The first coating is at least .25 m thick and the second .5 m, the total coating being preferably 1.5 to 3.8 m thick. The fluoride ions are added in the form of fluo-silicate, -titanate, -aluminate, or -zirconate, as alkali metal or alkaline earth salts. Preferably the SO4 ions comprise 25-65% of the combined SO4 and F ions present. Specifications 697,786 and 711,468 are referred to.
GB18317/60A 1959-05-28 1960-05-24 Chromium plating process Expired GB948739A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81637159A 1959-05-28 1959-05-28
US26152663A 1963-02-27 1963-02-27

Publications (1)

Publication Number Publication Date
GB948739A true GB948739A (en) 1964-02-05

Family

ID=31498110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18317/60A Expired GB948739A (en) 1959-05-28 1960-05-24 Chromium plating process

Country Status (4)

Country Link
US (1) US3461048A (en)
DE (2) DE1169754B (en)
FR (1) FR1255874A (en)
GB (1) GB948739A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1087613A (en) * 1963-09-19 1967-10-18 Wilmot Breeden Ltd Improvements in or relating to the electrodeposition of chromium
FR1597909A (en) * 1968-02-03 1970-06-29
US3725214A (en) * 1971-02-19 1973-04-03 Du Pont Chromium plating medium for a portable plating device
US4039399A (en) * 1971-03-11 1977-08-02 Dana Corporation Method of making a bearing surface
US3758390A (en) * 1971-06-18 1973-09-11 M & T Chemicals Inc Novel cromium plating compositions
US3812566A (en) * 1972-07-03 1974-05-28 Oxy Metal Finishing Corp Composite nickel iron electroplate and method of making said electroplate
USH543H (en) 1986-10-10 1988-11-01 The United States Of America As Represented By The Secretary Of The Army Laminated chromium composite
US4857436A (en) * 1987-12-28 1989-08-15 Nouel Jean Marie Offset plates with two chromium layers
US4996131A (en) * 1987-12-28 1991-02-26 Nouel Jean Marie Offset plate with thin chromium layer and method of making
US7749611B2 (en) * 2002-12-05 2010-07-06 Gbc Metals, L.L.C. Peel strength enhancement of copper laminates
US20040175582A1 (en) * 2002-12-05 2004-09-09 Olin Corporation, A Corporation Of The Commonwealth Of Virginia Laser ablation resistant copper foil
CN101555614B (en) * 2008-04-11 2011-03-30 深圳富泰宏精密工业有限公司 Plastic surface galvanizing method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890593C (en) * 1943-02-11 1953-09-21 Paul Eyerund Process for the electrolytic production of protective chrome layers on base metals subject to high temperatures
US2678908A (en) * 1951-07-26 1954-05-18 Eastman Kodak Co Method of forming ferrotyping surfaces
US2755537A (en) * 1952-08-22 1956-07-24 Gen Motors Corp Electroplated article
US2800438A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Chromium plating
US2916424A (en) * 1957-11-07 1959-12-08 Metal & Thermit Corp Process for chromium plating
US2871550A (en) * 1958-01-10 1959-02-03 Udylite Res Corp Composite chromium electroplate and method of making same
US2962428A (en) * 1959-01-15 1960-11-29 Metal & Thermit Corp Process for chromium plating
US3157585A (en) * 1959-12-18 1964-11-17 Gen Motors Corp Chromium plating

Also Published As

Publication number Publication date
FR1255874A (en) 1961-03-10
DE1169754B (en) 1964-05-06
US3461048A (en) 1969-08-12
DE1496896A1 (en) 1969-09-18

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