GB1396436A - Process for the electrolytic production of hard-magnetic layers - Google Patents

Process for the electrolytic production of hard-magnetic layers

Info

Publication number
GB1396436A
GB1396436A GB96773A GB96773A GB1396436A GB 1396436 A GB1396436 A GB 1396436A GB 96773 A GB96773 A GB 96773A GB 96773 A GB96773 A GB 96773A GB 1396436 A GB1396436 A GB 1396436A
Authority
GB
United Kingdom
Prior art keywords
current density
magnetic layers
density during
hard
amps
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
GB96773A
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.)
Akademie der Wissenschaften der DDR
Original Assignee
Akademie der Wissenschaften der DDR
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 Akademie der Wissenschaften der DDR filed Critical Akademie der Wissenschaften der DDR
Priority to GB96773A priority Critical patent/GB1396436A/en
Publication of GB1396436A publication Critical patent/GB1396436A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/18—Electroplating using modulated, pulsed or reversing current
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/615—Microstructure of the layers, e.g. mixed structure
    • C25D5/617—Crystalline layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

1396436 Electro-depositing magnetic layers AKADEMIE der WISSENSCHAFTEN der DDR 8 Jan 1973 967/73 Heading C7B Hard-magnetic metallic layers are produced on metallized non-rigid substrates drawn through an electrolysis bath at constant speed using electrolytes containing at least one salt of the metal or metals to be deposited and 2-30 grams/litre of disodium dihydrogen ethylenediaminetetraacetate, the solution having a pH of 2À5-6À0. A squarewave impulse current is used for electrolysis with a frequency of 2-10 Hz, the amplitude alternating from + to -, and the duration of a - part of the wave being 2-4 times the duration of the + part, the cathodic current density during the - part being at least 10 amps/dm<SP>2</SP> and the overall cathodically effective current density being 0À5-7 amps/dm<SP>2</SP> the anodic current density during a + part being related to the cathodic current density during a - part by a given formula. Reference is made to the production of magnetic layers of Co-P, Co-Ni-P, Co-W and Co-Ni-W.
GB96773A 1973-01-08 1973-01-08 Process for the electrolytic production of hard-magnetic layers Expired GB1396436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB96773A GB1396436A (en) 1973-01-08 1973-01-08 Process for the electrolytic production of hard-magnetic layers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB96773A GB1396436A (en) 1973-01-08 1973-01-08 Process for the electrolytic production of hard-magnetic layers

Publications (1)

Publication Number Publication Date
GB1396436A true GB1396436A (en) 1975-06-04

Family

ID=9713674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB96773A Expired GB1396436A (en) 1973-01-08 1973-01-08 Process for the electrolytic production of hard-magnetic layers

Country Status (1)

Country Link
GB (1) GB1396436A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371038A1 (en) * 1976-11-15 1978-06-09 Ibm MAGNETIC RECORDING MEDIA AND THEIR MANUFACTURING PROCESS
US4468293A (en) * 1982-03-05 1984-08-28 Olin Corporation Electrochemical treatment of copper for improving its bond strength
US4515671A (en) * 1983-01-24 1985-05-07 Olin Corporation Electrochemical treatment of copper for improving its bond strength
WO1997019206A1 (en) * 1995-11-21 1997-05-29 Atotech Deutschland Gmbh Process for the electrolytic deposition of metal layers
WO2006065220A1 (en) * 2004-12-14 2006-06-22 Polymer Kompositer I Göteborg Ab Pulse-plating method and apparatus
DE4225961C5 (en) * 1992-08-06 2011-01-27 Atotech Deutschland Gmbh Apparatus for electroplating, in particular copper plating, flat plate or arched objects

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371038A1 (en) * 1976-11-15 1978-06-09 Ibm MAGNETIC RECORDING MEDIA AND THEIR MANUFACTURING PROCESS
US4468293A (en) * 1982-03-05 1984-08-28 Olin Corporation Electrochemical treatment of copper for improving its bond strength
US4515671A (en) * 1983-01-24 1985-05-07 Olin Corporation Electrochemical treatment of copper for improving its bond strength
DE4225961C5 (en) * 1992-08-06 2011-01-27 Atotech Deutschland Gmbh Apparatus for electroplating, in particular copper plating, flat plate or arched objects
WO1997019206A1 (en) * 1995-11-21 1997-05-29 Atotech Deutschland Gmbh Process for the electrolytic deposition of metal layers
US6099711A (en) * 1995-11-21 2000-08-08 Atotech Deutschland Gmbh Process for the electrolytic deposition of metal layers
WO2006065220A1 (en) * 2004-12-14 2006-06-22 Polymer Kompositer I Göteborg Ab Pulse-plating method and apparatus

Similar Documents

Publication Publication Date Title
GB1534150A (en) Process for the treatment of metal surfaces by electro-deposition of metal coatings
GB1333254A (en) Method for electrodepositing an alloy film containing iron and nickel
ES430054A1 (en) Electrolytic burnished gold bath with higher rate of deposition
GB493485A (en) Process for the electrolytic production of metal coatings on objects with a non-conducting surface
GB1396436A (en) Process for the electrolytic production of hard-magnetic layers
ES429148A1 (en) Weak acidic bright ductile zinc electrolyte
GB1522535A (en) Method of surface treatment of a steel component
GB1408748A (en) Process for the electrolytic production of low-gloss nickel precipitates or nicel/cobalt precipitates on metallic surfaces
ES8200728A1 (en) Process for the electrolytic deposit of chromium
GB1279141A (en) A process for the electrodeposition of gold-copper-cadmium alloy coatings
GB727789A (en) Improvements in electro-deposition of chromium
GB880706A (en) Improvements in and relating to the electrodeposition of copper
GB625989A (en) Improvements in or relating to electroplating
GB857409A (en) Acid electrolytic copper-plating baths
GB1461181A (en) Electrophoretic enamelling
GB1294601A (en) Electrolytic plating solutions for deposition of noble metals
GB1358709A (en) Colouring the layer of alumina deposited by anodisation
US3349016A (en) Process for employing an auxiliary anode made of high purity nickel
GB1381484A (en) Method of producing bodies with electrolytically coated surface portions and bodies produced by such method
ES475680A1 (en) Acid zinc electroplating process and composition
GB1389609A (en) Enamelling of steel
GB1301202A (en) Electrolytic process
GB1338668A (en) Method for forming fluorine-containing resin film on metallic surface
GB1275396A (en) Electrodeposition of gold
GB1423928A (en) Method for the electrolytic deposition of copper on aluminium and its alloys and the products obtained therewith

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees