GB308771A - Improvements in or relating to chromium plating and baths therefor - Google Patents

Improvements in or relating to chromium plating and baths therefor

Info

Publication number
GB308771A
GB308771A GB36644/28A GB3664428A GB308771A GB 308771 A GB308771 A GB 308771A GB 36644/28 A GB36644/28 A GB 36644/28A GB 3664428 A GB3664428 A GB 3664428A GB 308771 A GB308771 A GB 308771A
Authority
GB
United Kingdom
Prior art keywords
gms
hydrochloric acid
acid
chromium
bath
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
GB36644/28A
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.)
Ternstedt Manufacturing Co
Original Assignee
Ternstedt Manufacturing Co
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 Ternstedt Manufacturing Co filed Critical Ternstedt Manufacturing Co
Publication of GB308771A publication Critical patent/GB308771A/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

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)
  • Electroplating Methods And Accessories (AREA)

Abstract

308,771. Ternstedt Manufacturing Co., (Assignees of McCullough, J. F. K., and Gilchrist, B. W.). March 29, 1928, [Convention date]. Chromium, depositing.-The bath consists of a solution of an alkali metal or alkaline earth metal chlorochromate; this may be obtained by treatment of a chromate or bichromate with a quantity of hydrochloric acid amounting to not less than 5 per cent of the final bath. A certain amount of chromium chromate may be formed by the addition of oxalic acid. In an example 240 gms. of sodium bichromate is dissolved in ¢ litre of warm water; 154 gms. concentrated hydrochloric acid and then 3.75 of hydrated oxalic acid are added and the solution made up to 1 litre with water. The temperature of electrolysis may be from room temperature to 160‹ F., and the cathode current density 100-500 amps per sq. foot at 4-13 volts. A slower bath is obtained by substituting for the above proportions 360 gms. sodium bichromate, 77 gms. hydrochloric acid, and 240 gms oxalic acid. The free hydrochloric acid may be replaced by acetic acid or phosphoric acid. Insoluble anodes of graphite or magnetite or chromium anodes or both may be used. Specification 292,094 is referred to.
GB36644/28A 1928-03-29 1928-12-12 Improvements in or relating to chromium plating and baths therefor Expired GB308771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US265808A US1797357A (en) 1928-03-29 1928-03-29 Chromium plating

Publications (1)

Publication Number Publication Date
GB308771A true GB308771A (en) 1930-01-09

Family

ID=23011962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36644/28A Expired GB308771A (en) 1928-03-29 1928-12-12 Improvements in or relating to chromium plating and baths therefor

Country Status (4)

Country Link
US (1) US1797357A (en)
DE (1) DE559681C (en)
FR (1) FR665651A (en)
GB (1) GB308771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855348A (en) * 1955-08-25 1958-10-07 Tiarco Corp Chromium plating

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847371A (en) * 1955-06-28 1958-08-12 Tiarco Corp Chromium plating on aluminum
DE2908846A1 (en) * 1978-03-08 1979-09-13 Yissum Res Dev Co GALVANIC CHROME BATH
FR2529581A1 (en) * 1982-06-30 1984-01-06 Armines ELECTROLYSIS BATH BASED ON TRIVALENT CHROME
DE19643752A1 (en) * 1996-10-23 1998-04-30 Abb Patent Gmbh Corrosion- and oxidation-resistant material, used as heat exchanger material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855348A (en) * 1955-08-25 1958-10-07 Tiarco Corp Chromium plating

Also Published As

Publication number Publication date
FR665651A (en) 1929-09-21
US1797357A (en) 1931-03-24
DE559681C (en) 1932-09-22

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