DE3380965D1 - METHOD FOR PRODUCING A PROTECTIVE LAYER FOR SURFACES SUBJECT TO MECHANICAL AND THERMAL WEAR. - Google Patents

METHOD FOR PRODUCING A PROTECTIVE LAYER FOR SURFACES SUBJECT TO MECHANICAL AND THERMAL WEAR.

Info

Publication number
DE3380965D1
DE3380965D1 DE8383113249T DE3380965T DE3380965D1 DE 3380965 D1 DE3380965 D1 DE 3380965D1 DE 8383113249 T DE8383113249 T DE 8383113249T DE 3380965 T DE3380965 T DE 3380965T DE 3380965 D1 DE3380965 D1 DE 3380965D1
Authority
DE
Germany
Prior art keywords
layer
mechanical
producing
protective layer
wear
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 - Fee Related
Application number
DE8383113249T
Other languages
German (de)
Inventor
Paolo Filomeni
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.)
IND Srl
Original Assignee
IND Srl
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 IND Srl filed Critical IND Srl
Application granted granted Critical
Publication of DE3380965D1 publication Critical patent/DE3380965D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • C25D5/625—Discontinuous layers, e.g. microcracked layers
    • 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
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
    • 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
    • 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
    • C25D5/623—Porosity of the layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/02—Surface coverings of combustion-gas-swept parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0406—Chromium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Physical Vapour Deposition (AREA)
  • Electronic Switches (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The process provides for coating surfaces (2) of elements (1) of heat engines subjected to wear by sliding and oxidation with a wear layer (3), and consists of a first electro-deposition phase performed in an aqueous electrolyte with a low hydrogen discharge, of a first layer (4) of hard chrome having a thickness lying between 20 and 40 mu m and a hardness lying between 400 and 600 HV; and a second electro-deposition phase in an aqueous electrolyte based on a mixture of acids, of a second layer (5) of hard chrome over the first layer (4), having a hardness of at least 1000 HV and a maximum thickness of about 1.2 mm.
DE8383113249T 1983-12-30 1983-12-30 METHOD FOR PRODUCING A PROTECTIVE LAYER FOR SURFACES SUBJECT TO MECHANICAL AND THERMAL WEAR. Expired - Fee Related DE3380965D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83113249A EP0147484B1 (en) 1983-12-30 1983-12-30 A process for obtaining a protective coating for surfaces subjected to mechanical and thermal wear, and coating obtained by such process

Publications (1)

Publication Number Publication Date
DE3380965D1 true DE3380965D1 (en) 1990-01-18

Family

ID=8190915

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383113249T Expired - Fee Related DE3380965D1 (en) 1983-12-30 1983-12-30 METHOD FOR PRODUCING A PROTECTIVE LAYER FOR SURFACES SUBJECT TO MECHANICAL AND THERMAL WEAR.

Country Status (3)

Country Link
EP (1) EP0147484B1 (en)
AT (1) ATE48659T1 (en)
DE (1) DE3380965D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000017482A (en) 1998-06-26 2000-01-18 Nippon Piston Ring Co Ltd Laminated chromium plating film excellent in wear resistance and fatigue strength
US7726121B2 (en) * 2004-08-06 2010-06-01 Yamaha Hatsudoki Kabushiki Kaisha Engine part
FR3032725B1 (en) * 2015-02-12 2019-04-12 Safran Aircraft Engines METHOD FOR DEPOSITING A COATING AGAINST EROSION ON A METAL PIECE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301720A (en) * 1961-09-26 1962-08-17 Process for the electroplating of porous hard chromium on aluminum or its alloys
DE1521079A1 (en) * 1963-12-04 1970-05-14 Volkswagenwerk Ag Process for depositing shiny, micro-cracked chrome coatings by means of double chrome plating
DE1496809A1 (en) * 1966-05-05 1969-07-17 Goetzewerke Process for chrome-plating, in particular piston rings

Also Published As

Publication number Publication date
ATE48659T1 (en) 1989-12-15
EP0147484A1 (en) 1985-07-10
EP0147484B1 (en) 1989-12-13

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee