GB1091526A - Improvements in electrodeposition of chromium - Google Patents

Improvements in electrodeposition of chromium

Info

Publication number
GB1091526A
GB1091526A GB29274/63A GB2927463A GB1091526A GB 1091526 A GB1091526 A GB 1091526A GB 29274/63 A GB29274/63 A GB 29274/63A GB 2927463 A GB2927463 A GB 2927463A GB 1091526 A GB1091526 A GB 1091526A
Authority
GB
United Kingdom
Prior art keywords
sulphate
ion
bath
silicofluoride
chromium
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
GB29274/63A
Inventor
Tony Eugene Such
Malcolm Partington
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.)
MacDermid Europe Ltd
Original Assignee
W Canning PLC
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 W Canning PLC filed Critical W Canning PLC
Publication of GB1091526A publication Critical patent/GB1091526A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/934—Electrical process
    • Y10S428/935—Electroplating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12472—Microscopic interfacial wave or roughness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component
    • Y10T428/12854—Next to Co-, Fe-, or Ni-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12944—Ni-base component

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

Micro-cracked chromium is cathodically deposited from an aqueous solution containing 100 to 200 g/l of chromic acid and, based on the chromic acid content, 0.1 to 0.3% sulphate ion and 1.5 to 4% silicofluoride ion, the silicofluoride ion content being greater than 2% if the sulphate ion content is less than 0.2%. Preferably the solution contains less than 8 g/l of metallic impurities such as iron, zinc or copper, e.g. resulting from dissolutio of articles to be plated. If a larger amount of impurities is present the solution should contain more than 0.25% of sulphate ion and more than 2% of silicofluoride ion. The bath may contain strontium sulphate in excess of its bath solubility and an innocuous strontium salt such as the chromate to suppress the solubility of the strontium sulphate and maintain the desired sulphate ion concentration. Typically the chromium is deposited at a current density of 160 amps/ft2 on steel panels which have been previously electroplated with bright nickel, the bath being used at 112 DEG F. Reference is made to liquid concentrates for making up the baths by mere dilution and to solid mixtures for dissolution to form the baths.
GB29274/63A 1963-07-24 1963-07-24 Improvements in electrodeposition of chromium Expired GB1091526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2972463 1963-07-24

Publications (1)

Publication Number Publication Date
GB1091526A true GB1091526A (en) 1967-11-15

Family

ID=10296110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29274/63A Expired GB1091526A (en) 1963-07-24 1963-07-24 Improvements in electrodeposition of chromium

Country Status (3)

Country Link
US (1) US3408272A (en)
DE (1) DE1496750A1 (en)
GB (1) GB1091526A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1447970A (en) * 1964-10-12 1966-08-05 Renault Corrosion resistant decorative chrome deposits
US3474010A (en) * 1966-10-26 1969-10-21 M & T Chemicals Inc Method of electroplating corrosion resistant coating
FR1597909A (en) * 1968-02-03 1970-06-29
US4039399A (en) * 1971-03-11 1977-08-02 Dana Corporation Method of making a bearing surface
US3771972A (en) * 1971-12-16 1973-11-13 Battelle Development Corp Coated article
US3812566A (en) * 1972-07-03 1974-05-28 Oxy Metal Finishing Corp Composite nickel iron electroplate and method of making said electroplate
CA2019861C (en) * 1990-06-26 1995-10-17 Hiroaki Kawamura Tin-plated steel sheet with a chromium bilayer and a copolyester resin laminate and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640022A (en) * 1950-11-07 1953-05-26 United Chromium Inc Composition, bath, and process for chromium plating
US2787589A (en) * 1954-08-12 1957-04-02 Metal & Thermit Corp Chromium plating
US2800438A (en) * 1955-07-26 1957-07-23 Metal & Thermit Corp Chromium plating
US3157585A (en) * 1959-12-18 1964-11-17 Gen Motors Corp Chromium plating

Also Published As

Publication number Publication date
US3408272A (en) 1968-10-29
DE1496750A1 (en) 1970-08-13

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