GB446393A - Method for the production of dark electrolytic deposits of rhodium - Google Patents

Method for the production of dark electrolytic deposits of rhodium

Info

Publication number
GB446393A
GB446393A GB22607/35A GB2260735A GB446393A GB 446393 A GB446393 A GB 446393A GB 22607/35 A GB22607/35 A GB 22607/35A GB 2260735 A GB2260735 A GB 2260735A GB 446393 A GB446393 A GB 446393A
Authority
GB
United Kingdom
Prior art keywords
rhodium
deposits
dark
solution
acid
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
GB22607/35A
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of GB446393A publication Critical patent/GB446393A/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
    • C25D3/50—Electroplating: Baths therefor from solutions of platinum group metals
    • C25D3/52—Electroplating: Baths therefor from solutions of platinum group metals characterised by the organic bath constituents used

Abstract

446,393. Electrodeposition of rhodium. HERAEUS GES., W. C., Hanau-on-Main, Germany. Aug. 10, 1935, No. 22607. Convention date, June 4. [Class 41] Rhodium deposits of dark tone are obtained by employment of usual rhodium baths to which have been added sulphuric acid and an organic colloid such as gelatine or starch or benzoic acid or a benzoate or phenol or a phenolate. Specific baths to which the additions may be made include a solution of rhodium sulphate in boric acid, a solution of a double sulphate of rhodium and alkali metal, and a solution of rhodium hydroxide in hydrofluoboric acid. These are operated above 50‹ C. The deposits are lustrous or matt according to the surface of the foundation metal. Articles may be ornamented by coating in part with light and in part with dark rhodium deposits.
GB22607/35A 1935-06-04 1935-08-10 Method for the production of dark electrolytic deposits of rhodium Expired GB446393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE446393X 1935-06-04

Publications (1)

Publication Number Publication Date
GB446393A true GB446393A (en) 1936-04-29

Family

ID=6537865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22607/35A Expired GB446393A (en) 1935-06-04 1935-08-10 Method for the production of dark electrolytic deposits of rhodium

Country Status (2)

Country Link
FR (1) FR793197A (en)
GB (1) GB446393A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577364A (en) * 1947-08-19 1951-12-04 Int Nickel Co Rhodium plating
US4416742A (en) * 1980-09-25 1983-11-22 Nippon Mining Co., Ltd. Process and electrolytic bath for making a rhodium-plated article having a black or blue color
US4486513A (en) * 1981-03-30 1984-12-04 Nippon Mining Co., Ltd. Process for producing rhodium-plated article with black color and wear resistance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048929B1 (en) * 1980-09-25 1987-12-09 Nippon Mining Company Limited Rhodium-plated article with black or blue color, process for making the same and bath therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577364A (en) * 1947-08-19 1951-12-04 Int Nickel Co Rhodium plating
US4416742A (en) * 1980-09-25 1983-11-22 Nippon Mining Co., Ltd. Process and electrolytic bath for making a rhodium-plated article having a black or blue color
US4486513A (en) * 1981-03-30 1984-12-04 Nippon Mining Co., Ltd. Process for producing rhodium-plated article with black color and wear resistance

Also Published As

Publication number Publication date
FR793197A (en) 1936-01-18

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