SE8405681D0 - PROCEDURES ACROSS HEART CHROME SEPARATION ON ANY METAL ALLOYING UNDER WESRIGEN, CHROMESEURE AND SUSPENSION ACTIONS CONTAINING ELECTROLYTES - Google Patents

PROCEDURES ACROSS HEART CHROME SEPARATION ON ANY METAL ALLOYING UNDER WESRIGEN, CHROMESEURE AND SUSPENSION ACTIONS CONTAINING ELECTROLYTES

Info

Publication number
SE8405681D0
SE8405681D0 SE8405681A SE8405681A SE8405681D0 SE 8405681 D0 SE8405681 D0 SE 8405681D0 SE 8405681 A SE8405681 A SE 8405681A SE 8405681 A SE8405681 A SE 8405681A SE 8405681 D0 SE8405681 D0 SE 8405681D0
Authority
SE
Sweden
Prior art keywords
wesrigen
chromeseure
chrome
heart
procedures
Prior art date
Application number
SE8405681A
Other languages
Swedish (sv)
Other versions
SE461663B (en
SE8405681L (en
Inventor
R Ludwig
H-J Welzel
M Kohl
Original Assignee
Lpw Chemie Gmbh
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 Lpw Chemie Gmbh filed Critical Lpw Chemie Gmbh
Publication of SE8405681D0 publication Critical patent/SE8405681D0/en
Publication of SE8405681L publication Critical patent/SE8405681L/en
Publication of SE461663B publication Critical patent/SE461663B/en

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
    • C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used

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)
  • Electroplating Methods And Accessories (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

For the purpose of increasing the current efficiency in a process for the deposition of hard chromium on workpieces of a metal alloy from an aqueous electrolyte containing chromic acid and sulphuric acid, a saturated aliphatic sulphonic acid with a maximum of two carbon atoms and a maximum of six sulphonic acid groups or their salts or halogen derivatives is added and operation is with a concentration of more than 0.5 g/l of the organic substance, with a bath temperature of 20 DEG to 70 DEG C and with a current density of 15 to 100 A/dm<2>. A working cathodic current efficiency of over 20% is achieved.
SE8405681A 1984-01-26 1984-11-13 PROCEDURES FOR EXPOSURE OF HEAVY CHROMES ON STEEL OR AN ALUMINUM ALLOY OF Aqueous, CR0 AND SULFUR ACID CONTAINING ELECTROLYT SE461663B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843402554 DE3402554A1 (en) 1984-01-26 1984-01-26 DEPOSITION OF HARD CHROME ON A METAL ALLOY FROM AN AQUEOUS ELECTROLYTE CONTAINING CHROME ACID AND SULFURIC ACID

Publications (3)

Publication Number Publication Date
SE8405681D0 true SE8405681D0 (en) 1984-11-13
SE8405681L SE8405681L (en) 1985-07-27
SE461663B SE461663B (en) 1990-03-12

Family

ID=6225909

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8405681A SE461663B (en) 1984-01-26 1984-11-13 PROCEDURES FOR EXPOSURE OF HEAVY CHROMES ON STEEL OR AN ALUMINUM ALLOY OF Aqueous, CR0 AND SULFUR ACID CONTAINING ELECTROLYT

Country Status (5)

Country Link
DE (1) DE3402554A1 (en)
FR (1) FR2558852B1 (en)
GB (1) GB2153387B (en)
HK (1) HK102588A (en)
SE (1) SE461663B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4588481A (en) * 1985-03-26 1986-05-13 M&T Chemicals Inc. Chromium plating bath for producing non-iridescent, adherent, bright chromium deposits at high efficiencies and substantially free of cathodic low current density etching
DE3933896C1 (en) * 1989-10-11 1990-10-11 Lpw-Chemie Gmbh, 4040 Neuss, De
AU638512B2 (en) * 1989-11-06 1993-07-01 Atotech Deutschland Gmbh Protection of lead-containing anodes during chromium electroplating
DE4011201C1 (en) * 1990-04-06 1991-08-22 Lpw-Chemie Gmbh, 4040 Neuss, De Coating workpiece with chromium for improved corrosion resistance - comprises using aq. electrolyte soln. contg. chromic acid sulphate ions, and fluoro:complexes to increase deposition
US5196108A (en) * 1991-04-24 1993-03-23 Scot Industries, Inc. Sucker rod oil well pump
DE4432512C2 (en) * 1994-09-13 1998-12-17 Lpw Chemie Gmbh Use of a process for the electrolytic deposition of chrome layers
US5735136A (en) * 1995-09-11 1998-04-07 Howe Corporation Flake freezing machine and system using same
DE19828545C1 (en) * 1998-06-26 1999-08-12 Cromotec Oberflaechentechnik G Galvanic bath for forming a hard chromium layer on machine parts
DE19913273C2 (en) * 1999-03-24 2003-07-24 Lpw Chemie Gmbh Process for producing pearl chrome layers on workpieces made of metal, in particular steel
DE10255853A1 (en) 2002-11-29 2004-06-17 Federal-Mogul Burscheid Gmbh Manufacture of structured hard chrome layers
DE102004019370B3 (en) * 2004-04-21 2005-09-01 Federal-Mogul Burscheid Gmbh Production of optionally coated structurized hard chrome layer, used e.g. for decoration, protection or functional coating on printing roller or stamping, embossing or deep drawing tool uses aliphatic sulfonic acid in acid plating bath
JP4650157B2 (en) 2005-01-12 2011-03-16 マツダ株式会社 Plating film for sliding part and method for forming the same
DE102008017270B3 (en) * 2008-04-04 2009-06-04 Federal-Mogul Burscheid Gmbh Structured chromium solid particle layer and method for its production and coated machine element
EP2792770B1 (en) 2013-04-17 2015-06-24 ATOTECH Deutschland GmbH Functional chromium layer with improved corrosion resistance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949040A (en) * 1954-06-30 1960-08-16 Rockwell Standard Co Vehicle drive mechanism
DE1034545B (en) * 1955-05-16 1958-07-17 Leon Stock Loading and unloading device, in particular for loading and unloading of fertilizer or the like.
DE1034945B (en) * 1956-05-15 1958-07-24 Riedel & Co Smoothing agent and bath for electrolytic chrome plating from an aqueous hexavalent chromic acid solution
US3745097A (en) * 1969-05-26 1973-07-10 M & T Chemicals Inc Electrodeposition of an iridescent chromium coating
US3758390A (en) * 1971-06-18 1973-09-11 M & T Chemicals Inc Novel cromium plating compositions
US4450052A (en) * 1982-07-28 1984-05-22 M&T Chemicals Inc. Zinc and nickel tolerant trivalent chromium plating baths

Also Published As

Publication number Publication date
FR2558852B1 (en) 1990-02-02
FR2558852A1 (en) 1985-08-02
GB2153387A (en) 1985-08-21
DE3402554A1 (en) 1985-08-08
GB2153387B (en) 1988-01-20
GB8432194D0 (en) 1985-01-30
HK102588A (en) 1988-12-23
SE461663B (en) 1990-03-12
SE8405681L (en) 1985-07-27
DE3402554C2 (en) 1987-09-10

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