GB1059569A - Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein - Google Patents

Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein

Info

Publication number
GB1059569A
GB1059569A GB4620862A GB4620862A GB1059569A GB 1059569 A GB1059569 A GB 1059569A GB 4620862 A GB4620862 A GB 4620862A GB 4620862 A GB4620862 A GB 4620862A GB 1059569 A GB1059569 A GB 1059569A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl alcohol
alkali metal
oxidized
solution
details
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
GB4620862A
Inventor
Tony Eugene Such
Harry Forsyth Davison
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.)
MacDermid Europe Ltd
Original Assignee
W Canning PLC
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 W Canning PLC filed Critical W Canning PLC
Priority to GB4620862A priority Critical patent/GB1059569A/en
Publication of GB1059569A publication Critical patent/GB1059569A/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
    • C25D3/26—Electroplating: Baths therefor from solutions of cadmium
    • C25D3/28—Electroplating: Baths therefor from solutions of cadmium from cyanide baths

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Bright Cd is electroplated from a bath containing a Cd complex alkali metal cyanide and an oxidized water-soluble polyvinyl alcohol as a brightener. Auxiliary brighteners, such as Ni and/or Co salts, aromatic aldehydes (e.g. anisaldehyde or veratraldehyde) and colloids (e.g. carboxymethyl cellulose or gelatine), and also wetting agents may be added. A specific bath to which oxidized polyvinyl alcohol is added comprises .Cd (as metal).22g/l .Total NaCN.125g/l .Total NaOH.34g/l .NiSO4 6H2O.1.25g/l Cd anodes are used in the Examples. Details of oxidizing the polyvinyl alcohol with H2O2, KMnO4 and K2Cr2O7 are given (see Division C3).ALSO:A water-soluble polyvinyl alcohol is oxidized with H2O2, alkali metal permanganates or alkali metal dichromates. Oxidation can be in a neutral aqueous solution but with H2O2 the solution may be acidified, e.g. with HCl, H2SO4, CH3COOH or HCOOH to accelerate the reaction and with alkali metal permanganate the solution can be acid or alkaline. Specific examples give reaction temperatures of 140 DEG F. and 185 DEG F. Details of Cd electroplating baths employing the oxidized polyvinyl alcohol are given (see Division C7).
GB4620862A 1962-12-07 1962-12-07 Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein Expired GB1059569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4620862A GB1059569A (en) 1962-12-07 1962-12-07 Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4620862A GB1059569A (en) 1962-12-07 1962-12-07 Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein

Publications (1)

Publication Number Publication Date
GB1059569A true GB1059569A (en) 1967-02-22

Family

ID=10440294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4620862A Expired GB1059569A (en) 1962-12-07 1962-12-07 Improvements in cadmium electroplating and in polyvinyl alcohol derivatives for use therein

Country Status (1)

Country Link
GB (1) GB1059569A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301120A1 (en) * 1987-07-29 1989-02-01 ECOFORM Umformtechnik GmbH Cold metal forming lubricant and method for its manufacture
EP0373879A2 (en) * 1988-12-12 1990-06-20 Mitsubishi Rayon Co., Ltd. Preparation process for toner polymer
EP0647659A1 (en) * 1993-04-15 1995-04-12 Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha Process for producing oxidized polymer solution and process for producing laminate therefrom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301120A1 (en) * 1987-07-29 1989-02-01 ECOFORM Umformtechnik GmbH Cold metal forming lubricant and method for its manufacture
EP0373879A2 (en) * 1988-12-12 1990-06-20 Mitsubishi Rayon Co., Ltd. Preparation process for toner polymer
EP0373879A3 (en) * 1988-12-12 1991-05-15 Mitsubishi Rayon Co., Ltd. Preparation process for toner polymer
EP0647659A1 (en) * 1993-04-15 1995-04-12 Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha Process for producing oxidized polymer solution and process for producing laminate therefrom
EP0647659A4 (en) * 1993-04-15 1995-09-27 Nippon Synthetic Chem Ind Process for producing oxidized polymer solution and process for producing laminate therefrom.

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