EP0194310A1 - Procede de formation d'une couche en surface sur des produits en aluminium et en alliage d'aluminium, et produit ainsi fabrique - Google Patents

Procede de formation d'une couche en surface sur des produits en aluminium et en alliage d'aluminium, et produit ainsi fabrique

Info

Publication number
EP0194310A1
EP0194310A1 EP19850905002 EP85905002A EP0194310A1 EP 0194310 A1 EP0194310 A1 EP 0194310A1 EP 19850905002 EP19850905002 EP 19850905002 EP 85905002 A EP85905002 A EP 85905002A EP 0194310 A1 EP0194310 A1 EP 0194310A1
Authority
EP
European Patent Office
Prior art keywords
manganese
nitrogen
oxygen
aluminum
sulphur
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.)
Withdrawn
Application number
EP19850905002
Other languages
German (de)
English (en)
Inventor
Alfred Serbinski
Waldemar Serbinski
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.)
Individual
Original Assignee
Individual
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
Priority claimed from SE8404762A external-priority patent/SE445933B/sv
Priority claimed from SE8404761A external-priority patent/SE445932B/sv
Application filed by Individual filed Critical Individual
Publication of EP0194310A1 publication Critical patent/EP0194310A1/fr
Withdrawn legal-status Critical Current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
    • C25D3/54—Electroplating: Baths therefor from solutions of metals not provided for in groups C25D3/04 - C25D3/50
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • 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
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment

Definitions

  • This invention is related to a process for producing a surface!
  • Said layer consists of manganese (Mn) comprising
  • Said layer exhibits a metallurgical bond (fusion bond) to the substrate, i.e. bonding to the substrate by diffusion caused by heating or optionally melting.
  • Galvanic (electrolytic) layers characteristically are inferior! to heat bonded layers as regards adherence.
  • galvanic (electrolytic) surface layers on j aluminum or aluminum alloy substrates with the same good
  • the invention uses a
  • the introduction of oxygen and nitrogen in the coating is preferably achieved by heat treating in an atmosphere which supplies nitrogen and oxygen to the manganese layer under the heat treating conditions, preferably an oxidizing treatment in an oxidizing atmosphere, preferably an atmosphere comprising water vapour, preferably for a period of at least 0.5 hours and preferably up to 1.5 hours, and a nitriding treatment, preferably in ammonia or cracked ammonia, preferably for a period of at least 0.5 hours and prefer-ably up to 6 hours.
  • oxidizing and nitriding treatments are preferably performed at a temperature of 753 to. 883°K and suitably simultaneously with the previously mentioned heat treatment for bonding the manganese .layer to the substrate.
  • the surface coating layer according to the invention comprises in addition to manganese also various compounds of manganese with nitrogen and oxygen, e.g. of the type Mn.N, Mn.,0., etc., as particulate precipitates in the manganese matrix, or various compounds of manganese with nitrogen, oxygen and sulphur, e.g. of the type Mn. (N, S, 0), in which the mutual quantity ratios of N, S and 0 may vary, i.e. from pure Mn,N, and, furthermore, compounds of the types Mn 2 (0,S),, Mn 3 (0,S) ., etc., as particulate precipitates in the manganese matrix.
  • the process according to the invention can basically be used for the treatment of all kinds of aluminum and aluminum alloy articles, e.g. parts for internal combustion engines, e.g. spark ignition and diesel engines, e.g. pistons and similar articles, engines with rotating piston, such as wankel engine ⁇ and in general for articles of aluminum and aluminum alloys which are subjected to wear and/or are intended to exhibit low friction.
  • the aluminum alloy should preferably have a compo ⁇ sition which permits coating, especially electrolytical coating with manganese (or optionally with manganese alloys consisting mainly or to at least 75% or 90% of manganese) and ; firm bonding of the manganese (or manganese alloy) coating to ; the aluminum substrate by heat bonding (metallurgical bonding) .
  • Electrolyte temperature 283-288°K, electrolyte pH 7.0
  • the electrolytic manganizing process was performed with anodes made from an alloy of, by weight:
  • the aluminum articles were subjected to an oxidizing treatment in water vapour for 0.5 hours and a nitriding treatment in ammonia for 2 hours, both at the temperature 813°K.
  • Example 2 The same substrates and pretreatment as in Example 1 were used but instead of the oxidizing-nitriding treatment of Example 1 the aluminum articles were subjected to a heat treatment for introducing oxygen (0), sulphur (S) and nitrogen (N). in an atmosphere comprising a nitrogen source (ammonia, NH.,), a sulphur source and an oxygen source (sulphur dioxide, S0 2 ) at a temperature of 883°K for 3 hours.
  • a nitrogen source ammonia, NH.,
  • S0 2 oxygen source
  • the articles were degreased in the same kind of solution and in the same way as according to Example 1.
  • the articles were ⁇ then rinsed in hot and cold water and thereafter immersed into ; a solution of:
  • Example 1 The composition of the electrolyte and the treatment conditions were the same as in Example 1.
  • the aluminum alloy articles were subjected to an oxidizing treatment in water vapour for 1.5 hours and a nitriding treatment in ammonia (cracked ammonia) for 6 hours, both at a temperature of 753°K.
  • the prepared coatings comprise Mn and hard Mn-,0 4 and Mn 4 particles.
  • Example 3 The same substrates and pretreatments as in Example 3 were used but instead of the oxidizing and nitriding treatments of Example 3 the aluminum alloy articles were subjected to a heat, treatment in an atmosphere comprising an oxygen source, a sulphur source and a nitrogen source for simultaneous intro ⁇ duction of said elements into the layer, said atmosphere comprising ammonia (NH-,) and sulphur dioxide (SO-) at a temperature of 753°K for 10 hours. Said treatment can be regarded as an oxygen, sulphur and nitrogen saturation treatment. _____,
  • the manganese coating according to this invention preferably comprises the compounds or reaction products of manganese with oxygen, nitrogen and optionally sulphur embedded as particles ' in a matrix of manganese metal or alloy, especially as a composite coating.
  • the amount of oxygen, nitrogen and optionally sulphur in the coating preferably is an amount corresponding at least to the amount introduced by heat treatment in water vapor or ammonia (or cracked ammoni ⁇ ) or a mixture of ammonia and sulphur dioxide for 0,5 hours at 753°K.
  • the manganese coating may optionally be applied also by e.g. electroless coating, flame spraying or plasma flame spraying deposition from a vapour phase, such as a manganese compound vapor phase , e.g. metallizing with manganese, e.t.c.
  • a vapour phase such as a manganese compound vapor phase
  • the reaction products with oxygen, nitrogen and optionally sulfur may be included into the manganese coating already in the coating step, e.g. as reaction products formed already prior to the coating step or in the coating step.
  • the coating may comprise also other constituents, such as conventional impurities normally present in the raw materials or deliberately added constituents which do not prevent or substantially reduce the desired inventive effect.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

Un procédé de formation d'une couche superficielle sur des produits en aluminium et en alliage d'aluminium se caractérise par la formation sur la surface du produit d'un revêtement comprenant du manganèse et des produits de réaction du manganèse avec de l'oxygène et de l'azote ou avec de l'oxygène, de l'azote et du soufre. Un produit comprenant au moins une partie de surface en alliage d'aluminium ou en aluminium se caractérise en ce que la surface d'aluminium ou d'alliage d'aluminium est pourvue d'un revêtement de surface comprenant du manganèse et des produits de réaction du manganèse avec de l'oxygène et de l'azote ou avec de l'oxygène, de l'azote et du soufre, de préférence sous la forme de particules dispersées dans une matrice d'une couche de surface de manganèse.
EP19850905002 1984-09-24 1985-09-24 Procede de formation d'une couche en surface sur des produits en aluminium et en alliage d'aluminium, et produit ainsi fabrique Withdrawn EP0194310A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8404761 1984-09-24
SE8404762A SE445933B (sv) 1984-09-24 1984-09-24 Forfarande for paforing av ett ytskikt pa foremal av aluminium och aluminiumlegeringar
SE8404762 1984-09-24
SE8404761A SE445932B (sv) 1984-09-24 1984-09-24 Forfarande for paforing av ett ytskikt pa foremal av aluminium och aluminiumlegeringar

Publications (1)

Publication Number Publication Date
EP0194310A1 true EP0194310A1 (fr) 1986-09-17

Family

ID=26658789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850905002 Withdrawn EP0194310A1 (fr) 1984-09-24 1985-09-24 Procede de formation d'une couche en surface sur des produits en aluminium et en alliage d'aluminium, et produit ainsi fabrique

Country Status (5)

Country Link
EP (1) EP0194310A1 (fr)
AU (1) AU4964185A (fr)
DK (1) DK245986D0 (fr)
FI (1) FI862191A0 (fr)
WO (1) WO1986001836A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4939308A (en) * 1988-04-29 1990-07-03 Allied-Signal Inc. Method of forming crystallite-oriented superconducting ceramics by electrodeposition and thin film superconducting ceramic made thereby
WO1989010336A1 (fr) * 1988-04-29 1989-11-02 Allied-Signal Inc. Films ceramiques supraconducteurs par electrodeposition
WO2008124247A1 (fr) * 2007-04-06 2008-10-16 Swagelok Company Activation de l'aluminium

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765847A (en) * 1972-04-17 1973-10-16 B Behl Process for plating aluminum alloys with manganese

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8601836A1 *

Also Published As

Publication number Publication date
WO1986001836A1 (fr) 1986-03-27
FI862191A (fi) 1986-05-26
DK245986D0 (da) 1986-05-26
AU4964185A (en) 1986-04-08
FI862191A0 (fi) 1986-05-26

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