GB1128465A - Improvements in or relating to electrodeposition of chromium - Google Patents

Improvements in or relating to electrodeposition of chromium

Info

Publication number
GB1128465A
GB1128465A GB42316/65A GB4231665A GB1128465A GB 1128465 A GB1128465 A GB 1128465A GB 42316/65 A GB42316/65 A GB 42316/65A GB 4231665 A GB4231665 A GB 4231665A GB 1128465 A GB1128465 A GB 1128465A
Authority
GB
United Kingdom
Prior art keywords
electro
acids
fluoride
bath
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
GB42316/65A
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.)
M&T Chemicals Inc
Original Assignee
M&T Chemicals Inc
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 M&T Chemicals Inc filed Critical M&T Chemicals Inc
Publication of GB1128465A publication Critical patent/GB1128465A/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
    • 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
    • Y10S205/00—Electrolysis: processes, compositions used therein, and methods of preparing the compositions
    • Y10S205/917—Treatment of workpiece between coating steps

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

1,128,465. Electro-deposition of chromium. M. & T o CHEMICALS Inc. Oct. 5, 1965 [Oct. 8, 1964], No.42316/65. Heading C7B. A process for electro-depositing a bright decorative chromium plate on to a basis metal including or consisting of a metal having an atomic number of 24-30 inclusive (namely Cr, Mn, Fe, Co, Ni, Cu or Zn) comprises maintaining a hexavalent chromium plating bath containing chromic acid and sulphate with or without fluoride or fluoride complex and having a weight ratio of CrO/SO 4 3- plus any fluoride or complex fluoride of 125-550:1, and an anion of an organic acid chosen from aliphatic dicarboxylic acids having at least three carbon atoms and aliphatic monocarboxylic acids but excluding trichloracetic and tartaric acids, and electro-depositing a bright decorative chromium plate from the bath on to the basis metal as cathode in the bath. The fluoride, if present, may be the silicofluoride, fluoborate or fluotitanate. The bath may contain Sr SO 4 plus a source of excess Sr ion such as strontium hydroxide, chromate or carbonate. The organic acid anions may be added to the bath in the form of the acids themselves or as their anhydrides or Na salts. Specified acids are:- malonic, fumaric, succinic, glutaric, adipic, pimelic, acetic, propionic, butyric, pentanoic, isobutyric acids and cyclohexane monocarboxylic acid. The Cr may be electro-plated on to stainless steel or brass or active Ni, e.g. freshly electro-deposited Ni (e.g. on Fe) or Ni which has been rendered active by cathodic or other reducing treatment. Examples are given of electro-plating Cr on to Ni-plated brass panels.
GB42316/65A 1964-10-08 1965-10-05 Improvements in or relating to electrodeposition of chromium Expired GB1128465A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40261964A 1964-10-08 1964-10-08
US69842568A 1968-01-17 1968-01-17

Publications (1)

Publication Number Publication Date
GB1128465A true GB1128465A (en) 1968-09-25

Family

ID=27017956

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42316/65A Expired GB1128465A (en) 1964-10-08 1965-10-05 Improvements in or relating to electrodeposition of chromium

Country Status (6)

Country Link
US (1) US3475294A (en)
CH (1) CH473230A (en)
DE (1) DE1496918A1 (en)
FR (1) FR1450064A (en)
GB (1) GB1128465A (en)
NL (1) NL6513035A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6800734A (en) * 1967-01-18 1968-07-19
US3706636A (en) * 1971-02-19 1972-12-19 Du Pont Preparing plating bath containing chromic compound
US3725214A (en) * 1971-02-19 1973-04-03 Du Pont Chromium plating medium for a portable plating device
US4092226A (en) * 1974-12-11 1978-05-30 Nikolaus Laing Process for the treatment of metal surfaces by electro-deposition of metal coatings at high current densities
US4206019A (en) * 1978-04-07 1980-06-03 M&T Chemicals Inc. Novel low concentration decorative chromium plating baths and method
EP0041085A1 (en) * 1980-06-02 1981-12-09 M & T Chemicals, Inc. Chromium plating process, composition therefor and chromium plating solution

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623847A (en) * 1947-09-10 1952-12-30 Lloyd O Gilbert Black chromium plating
US2640022A (en) * 1950-11-07 1953-05-26 United Chromium Inc Composition, bath, and process for chromium plating
US2745801A (en) * 1955-03-14 1956-05-15 Harshaw Chem Corp Chromium plating
BE632459A (en) * 1962-05-16
US3282812A (en) * 1964-02-20 1966-11-01 Udylite Corp Electrodeposition of chromium
US3311548A (en) * 1964-02-20 1967-03-28 Udylite Corp Electrodeposition of chromium

Also Published As

Publication number Publication date
US3475294A (en) 1969-10-28
CH473230A (en) 1969-05-31
DE1496918A1 (en) 1970-01-08
FR1450064A (en) 1966-05-06
NL6513035A (en) 1966-04-12

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