GB1437818A - Electrodeposition of chromium - Google Patents

Electrodeposition of chromium

Info

Publication number
GB1437818A
GB1437818A GB2598473A GB2598473A GB1437818A GB 1437818 A GB1437818 A GB 1437818A GB 2598473 A GB2598473 A GB 2598473A GB 2598473 A GB2598473 A GB 2598473A GB 1437818 A GB1437818 A GB 1437818A
Authority
GB
United Kingdom
Prior art keywords
anode
bath
cro
anodes
electro
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
GB2598473A
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.)
BRITISH CHROME CHEMICALS Ltd
Original Assignee
BRITISH CHROME CHEMICALS Ltd
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 BRITISH CHROME CHEMICALS Ltd filed Critical BRITISH CHROME CHEMICALS Ltd
Priority to GB2598473A priority Critical patent/GB1437818A/en
Priority to BE144763A priority patent/BE815554A/en
Priority to IT6867874A priority patent/IT1014242B/en
Priority to DE19742426046 priority patent/DE2426046A1/en
Priority to JP6032074A priority patent/JPS50110939A/ja
Priority to FR7418875A priority patent/FR2231770B1/fr
Priority to NL7407365A priority patent/NL7407365A/xx
Publication of GB1437818A publication Critical patent/GB1437818A/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)
  • Electrolytic Production Of Metals (AREA)

Abstract

1437818 Electro-depositing chromium BRITISH CHROME & CHEMICALS Ltd 23 May 1974 [31 May 1973] 25984/73 Heading C7B In the electro-deposition of Cr from a bath based predominantly on Cr<SP>3+</SP> and halide, the bath is replenished during electrolysis by adding Cr<SP>6+</SP> at or near the anode at a rate such that a positive Cr<SP>6+</SP> concentration of up to 0À2 gpl (calculated as Cr) is maintained at the cathode (by which is meant as close to the cathode as Cr<SP>6+</SP> can exist but outside the surface layer of Cr<SP>2+</SP>). Replenishment may be via a water soluble compound, e.g. CrO 3 , or a soluble Cr anode. A pH below 3 may be maintained e.g. by adding HCl or H 2 SO 4 when using a Cr anode or NH 4 OH when CrO 3 is added. To prevent excess Cr<SP>6+</SP> build up either a reducing agent is added as required e.g. H 2 O 2 or, when Cr anodes are used, a mixture of Cr and inept (e.g. carbon) anodes is used. The bath may contain CrCl 3 and/ or a complex Cr halocarboxylate, the specified components being NH 4 Cl, Na Cl, B(OH) 3 and an aprotic solvent e.g. dimethyl formamide.
GB2598473A 1973-05-31 1973-05-31 Electrodeposition of chromium Expired GB1437818A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB2598473A GB1437818A (en) 1973-05-31 1973-05-31 Electrodeposition of chromium
BE144763A BE815554A (en) 1973-05-31 1974-05-27 IMPROVEMENTS TO THE ELECTROLYTIC DEPOSIT OF METALS
IT6867874A IT1014242B (en) 1973-05-31 1974-05-29 PROCEDURE FOR THE ELECTRODEPOSITION OF CHROME
DE19742426046 DE2426046A1 (en) 1973-05-31 1974-05-30 PROCESS FOR THE ELECTROCHEMICAL DEPOSITION OF CHROME
JP6032074A JPS50110939A (en) 1973-05-31 1974-05-30
FR7418875A FR2231770B1 (en) 1973-05-31 1974-05-30
NL7407365A NL7407365A (en) 1973-05-31 1974-05-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2598473A GB1437818A (en) 1973-05-31 1973-05-31 Electrodeposition of chromium

Publications (1)

Publication Number Publication Date
GB1437818A true GB1437818A (en) 1976-06-03

Family

ID=10236473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2598473A Expired GB1437818A (en) 1973-05-31 1973-05-31 Electrodeposition of chromium

Country Status (7)

Country Link
JP (1) JPS50110939A (en)
BE (1) BE815554A (en)
DE (1) DE2426046A1 (en)
FR (1) FR2231770B1 (en)
GB (1) GB1437818A (en)
IT (1) IT1014242B (en)
NL (1) NL7407365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2640873A1 (en) * 2010-11-16 2013-09-25 MacDermid Acumen, Inc. Electrolytic dissolution of chromium from chromium electrodes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1838777A (en) * 1928-03-26 1931-12-29 Ternstedt Mfg Co Chromium plating
US2088615A (en) * 1932-06-29 1937-08-03 Schlotter Max Electrodeposition of chromium
US2377229A (en) * 1937-07-03 1945-05-29 Little Inc A Electrolytic deposition of chromium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2640873A1 (en) * 2010-11-16 2013-09-25 MacDermid Acumen, Inc. Electrolytic dissolution of chromium from chromium electrodes
EP2640873A4 (en) * 2010-11-16 2017-03-29 MacDermid Acumen, Inc. Electrolytic dissolution of chromium from chromium electrodes

Also Published As

Publication number Publication date
JPS50110939A (en) 1975-09-01
DE2426046A1 (en) 1974-12-19
FR2231770B1 (en) 1979-07-13
BE815554A (en) 1974-09-16
FR2231770A1 (en) 1974-12-27
IT1014242B (en) 1977-04-20
NL7407365A (en) 1974-12-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee