GB771695A - A process for the electrodeposition of iron-chromium alloy - Google Patents

A process for the electrodeposition of iron-chromium alloy

Info

Publication number
GB771695A
GB771695A GB2284554A GB2284554A GB771695A GB 771695 A GB771695 A GB 771695A GB 2284554 A GB2284554 A GB 2284554A GB 2284554 A GB2284554 A GB 2284554A GB 771695 A GB771695 A GB 771695A
Authority
GB
United Kingdom
Prior art keywords
gms
chromium
iron
sulphate
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
GB2284554A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2284554A priority Critical patent/GB771695A/en
Publication of GB771695A publication Critical patent/GB771695A/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
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt

Abstract

771,695. Electrodeposition of iron-chromium alloys. YOSHIDA, T. Aug. 5, 1954, No. 22845/54. Class 41. Iron-chromium alloys are deposited by electrolysis of an aqueous bath having a ratio by weight of trivalent chromium to divalent iron greater than 1.3 and containing per litre 10-63 gms. trivalent chromium, 5-40 gms. divalent iron, and 100-264 gms. of urea, and an amount of sulphate radical at least stoichiometrically equivalent to the total content of trivalent chromium and divalent iron, the bath having been brought to equilibrium as regards complex ions by keeping it at a constant temperature between 25‹ and 55‹ C., the time for attaining equilibrium ranging correspondingly from 270 to 8 hours. For a practical process, additional sulphate and chloride ions are added to increase the bath conductivity and to speed up anode dissolution. Typically the bath contains per litre 160 gms. chromium sulphate, 60 gms. ferrous sulphate, 200 gms. ammonium sulphate, 180 gms. urea, and 10 gms. ammonium chloride and was employed at 40‹ C. after having beeen held at this temperature for 50 hours, using as anode an iron-chromium alloy containing 18 per cent chromium at a cathode current density of 15 amps./sq. dm. to deposit an alloy containing 21 per cent chromium. Specification 715,225 is referred to.
GB2284554A 1954-08-05 1954-08-05 A process for the electrodeposition of iron-chromium alloy Expired GB771695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2284554A GB771695A (en) 1954-08-05 1954-08-05 A process for the electrodeposition of iron-chromium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2284554A GB771695A (en) 1954-08-05 1954-08-05 A process for the electrodeposition of iron-chromium alloy

Publications (1)

Publication Number Publication Date
GB771695A true GB771695A (en) 1957-04-03

Family

ID=10185973

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2284554A Expired GB771695A (en) 1954-08-05 1954-08-05 A process for the electrodeposition of iron-chromium alloy

Country Status (1)

Country Link
GB (1) GB771695A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163779A (en) * 1984-08-27 1986-03-05 Nippon Kokan Kk Cr-alloy plating bath
CN115976535A (en) * 2022-12-23 2023-04-18 中国科学院青海盐湖研究所 Method and device for preparing trivalent chromium salt by electrochemical oxidation of chromium iron in acid system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163779A (en) * 1984-08-27 1986-03-05 Nippon Kokan Kk Cr-alloy plating bath
CN115976535A (en) * 2022-12-23 2023-04-18 中国科学院青海盐湖研究所 Method and device for preparing trivalent chromium salt by electrochemical oxidation of chromium iron in acid system
CN115976535B (en) * 2022-12-23 2023-08-18 中国科学院青海盐湖研究所 Method and device for preparing trivalent chromium salt by electrochemical oxidation of ferrochrome in acidic system

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