SE445933B - Procedure for applying a surface layer to objects of aluminium or aluminium alloy - Google Patents

Procedure for applying a surface layer to objects of aluminium or aluminium alloy

Info

Publication number
SE445933B
SE445933B SE8404762A SE8404762A SE445933B SE 445933 B SE445933 B SE 445933B SE 8404762 A SE8404762 A SE 8404762A SE 8404762 A SE8404762 A SE 8404762A SE 445933 B SE445933 B SE 445933B
Authority
SE
Sweden
Prior art keywords
aluminium
objects
procedure
applying
surface layer
Prior art date
Application number
SE8404762A
Other languages
Swedish (sv)
Other versions
SE8404762D0 (en
SE8404762L (en
Inventor
Alfred Serbinski
Waldemar Serbinski
Original Assignee
Alfred Serbinski
Waldemar Serbinski
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 Alfred Serbinski, Waldemar Serbinski filed Critical Alfred Serbinski
Priority to SE8404762A priority Critical patent/SE445933B/en
Publication of SE8404762D0 publication Critical patent/SE8404762D0/en
Priority to AU49641/85A priority patent/AU4964185A/en
Priority to EP19850905002 priority patent/EP0194310A1/en
Priority to PCT/SE1985/000367 priority patent/WO1986001836A1/en
Publication of SE8404762L publication Critical patent/SE8404762L/en
Priority to DK245986A priority patent/DK245986D0/en
Priority to FI862191A priority patent/FI862191A/en
Publication of SE445933B publication Critical patent/SE445933B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/01—Pistons; Trunk pistons; Plungers characterised by the use of particular materials
    • 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
    • C23C8/10—Oxidising
    • 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
    • C23C8/10—Oxidising
    • C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
    • 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
    • C23C8/24—Nitriding
    • 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
    • C23C8/34—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 more than one element being applied in more than one step
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12—Light metals
    • C23G1/125—Light metals aluminium
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/22—Light metals
    • 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
    • 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
    • C25D5/54—Electroplating of non-metallic surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Resistance Heating (AREA)

Abstract

The invention is a procedure for applying a surface layer to objects of aluminium or aluminium alloy. A manganese coating is electrolytically applied to the object's surface after which the object is subjected to thermal treatment in a gas atmosphere, which supplies oxygen [O] and nitrogen [N] to the manganese coating.

Description

84Û4762°0 Metoder för galvanisering av aluminium med mangan är i och för sig I allmänt kända. Enligt uppfinningen har det visat sig möjligt att åstadkomma kraftig vidhâftning av en sådan manganbeläggning till underlaget av aluminium eller aluminiumlegering och att samtidigt ge beläggningen de förutnämnda goda egenskaperna beträffande beständighet mot slitage och friktion. Detta åstadkommas genom uppfinningen genom värmebehandling av manganskiktet och införlivande av syre och kväve i detta. 84Û4762 ° 0 Methods for galvanizing aluminum with manganese are per se generally known. According to the invention, it has been found possible to achieve strong adhesion of such a manganese coating to the substrate of aluminum or aluminum alloy and at the same time to give the coating the aforementioned good properties with respect to resistance to wear and friction. This is achieved by the invention by heat treatment of the manganese layer and incorporation of oxygen and nitrogen therein.

Värmebehandlingen enligt uppfinningen genomföras företrädesvis vid en temperatur av 753-883 K. Värmebehandlingstiden är företrädesvis 0.5-fi.0> timmar. lnförlivandet av syre och kväve i skiktet genomföras företrädesvis genom värmebehandling i en atmosfär som avger kväve och syre till mangan- skiktet under värmebehandlingen. företrädesvis en oxideringsbehandling i en oxiderande atmosfär. företrädesvis en atmosfär innehållande vattenånga. företrädesvis under en tid av minst 0.5 timmar och upp till 1.5 timmar. samt en nitreringsbehandling. företrädesvis i ammoniak eller krackad ammoniak. företrädesvis under en tid av'0.5 timmar och upp till 6.0 timmar.The heat treatment according to the invention is preferably carried out at a temperature of 753-883 K. The heat treatment time is preferably 0.5-fi.0> hours. The incorporation of oxygen and nitrogen into the layer is preferably carried out by heat treatment in an atmosphere which delivers nitrogen and oxygen to the manganese layer during the heat treatment. preferably an oxidation treatment in an oxidizing atmosphere. preferably an atmosphere containing water vapor. preferably for a period of at least 0.5 hours and up to 1.5 hours. as well as a nitriding treatment. preferably in ammonia or cracked ammonia. preferably for a period of 0.5 hours and up to 6.0 hours.

' Denna oxíderande och nitrerande behandling genomföras företrädesvis vid en temperatur av 753-003 K och lämpligen samtidigt med den förutnämnda värme- behandlingen.This oxidizing and nitriding treatment is preferably carried out at a temperature of 753-003 K and preferably simultaneously with the aforementioned heat treatment.

Med förfarandet enligt uppfinningen erhålles på ytan av aluminium och aluminiumlegeringar ett ytbeläggningsskikt av komposittyp. som kännetecknas av hög hårdhet och mycket god vidhäftningsförmåga samt minskad friktions- koefficient.With the method according to the invention, a composite type coating layer is obtained on the surface of aluminum and aluminum alloys. which is characterized by high hardness and very good adhesion and reduced coefficient of friction.

Den maximala hårdheten i skiktet förekommer vanligen på ett visst avstånd från ytan. liksom vid nitreringsprocessen. och kan överstiga HV 0.01 = 1000.The maximum hardness of the layer usually occurs at a certain distance from the surface. as well as in the nitration process. and may exceed HV 0.01 = 1000.

Förfarandet enligt uppfinningen kan i princip användas på alla slags föremål av aluminium och aluminiumlegeringar. t.ex. på föremål för förbränningsmotorer. såsom explosions- och dieselmotorer. såsom kolvar och liknande. samt generellt för föremål av aluminium och aluminiumlegeringar som är utsatta för slitage och/eller skall uppvisa låg friktion 8404762-0 Uppfinningen beskrivas närmare med följande utföringsexempel.The method according to the invention can in principle be applied to all kinds of objects of aluminum and aluminum alloys. for example on objects of internal combustion engines. such as explosion and diesel engines. such as flasks and the like. and generally for objects of aluminum and aluminum alloys which are exposed to wear and / or must exhibit low friction. The invention is described in more detail with the following exemplary embodiments.

Exemgel _ l Underlag: aluminiumföre-mål. som avfettas i lösning av: H20 273 ml NasPOq 13.5 g NaOH 2.1 g Na2SiO3 10.5 g Temperatur 323 K under 5 minuter. Sedan sköljes föremålet i varmt och kallt vatten. därefter doppas det i en lösning av: HCI 0.580 l MnSDqåHZD 7 g H20 1.76 I Denna behandling genomföras vid en temperatur av 310 K och under 15-30 sekunder. Efter noggrann sköljning i vatten underkastas aluminium- föremålet direkt en elektrolytisk manganering med Följande elektrolyt: MnSOWSHZD 200 g/I [NHq] 2504 75 g/l H20 beroende av elektrolytbehållarens volym.Example gel _ l Substrate: aluminum object. which is degreased in solution of: H 2 O 273 ml NasPOq 13.5 g NaOH 2.1 g Na 2 SiO 3 10.5 g Temperature 323 K for 5 minutes. Then rinse the object in hot and cold water. then it is dipped in a solution of: HCl 0.580 l MnSDqåHZD 7 g H 2 O 1.76 I This treatment is carried out at a temperature of 310 K and for 15-30 seconds. After rinsing thoroughly in water, the aluminum object is immediately subjected to an electrolytic manganese treatment with the following electrolyte: MnSOWSHZD 200 g / l [NHq] 2504 75 g / l H

Elektrolytens temperatur 283-288 K.pH = 7.0 Strömtäthet [IH-lä] x 102 A/mz.Electrolyte temperature 283-288 K.pH = 7.0 Current density [1H-load] x 102 A / mz.

Vid den elektrolytiska manganeringsprooessen använder man legerande anoder av: Sn 30 % Do 0.1! % resten Pb Det år nödvändigt att omröra elektrolyten kontinuerligt och att använda diafragma För att åtskilja anoden Från katoden.In the electrolytic manganeseization process, alloying anodes of: Sn 30% Do 0.1 are used! % residue Pb It is necessary to stir the electrolyte continuously and to use the diaphragm To separate the anode from the cathode.

Direkt efter upptagningen från elektrolyten doppas föremålet i 5 X-ig lösning av: Na2Gr2ClT2H2O s4o4762-0 Efter elektrolytisk manganering underkastas aluminiumfñremâlet en oxideringsbehandling i vattenånga under 0.5 timmar och nitreringsbehandling i ammoniak under 2.0 timmar vid temperaturen 813 K.Immediately after uptake from the electrolyte, the article is immersed in 5 X solution of: Na2Gr2ClT2H2O s4o4762-0.

Exempel 2 Underlag: aluminiumlegeringsföremål med sammansättningen: [Si ~ 123%, Cu = 0.9 %. Mg ='1.3 Z. Ni -= 0.9 Z. Fe ==r 0.3 X. resten All.Example 2 Substrate: aluminum alloy article with the composition: [Si ~ 123%, Cu = 0.9%. Mg = '1.3 Z. Ni - = 0.9 Z. Fe == r 0.3 X. residues All.

Füremålet avfettas i samma lösning och på samma sätt som i exempel 1.The object is degreased in the same solution and in the same way as in Example 1.

Sedan skñljes föremålet i varmt och kallt vatten och därefter doppas det i en lösning av: Hmoa '15 x vuiym -HF 25 76 volym Denna behandling genumfñres vid en temperatur av 293 K och under 15-30 sekunder. Direkt därefter skñljes föremålet noggrant i vatten och underkastas en elektrolytisk manganering. Sammansättningen av elektrolyten och villkoren âr desamma som i exempel l.Then the object is rinsed in hot and cold water and then dipped in a solution of: Hmoa '15 x volume -HF 25 76 volume This treatment is carried out at a temperature of 293 K and for 15-30 seconds. Immediately afterwards, the object is thoroughly rinsed in water and subjected to electrolytic manganese. The composition of the electrolyte and the conditions are the same as in Example 1.

Efter elektrolytisk manganering underkastas aluminiumlegeringsfñremålet _ en oxideringsbehandling i vattenånga under 1.5 timmar och nitreringsbehandling i ammoniak under 6,0 timmar vid temperaturen 753 K.After electrolytic manganese, the aluminum alloy article is subjected to an oxidation treatment in water vapor for 1.5 hours and a nitration treatment in ammonia for 6.0 hours at a temperature of 753 K.

Ythårdheten efter oxiderings- och nitreringsbehandlingen kan överstiga HV 0.01 == 1000.The surface hardness after the oxidation and nitriding treatment can exceed HV 0.01 == 1000.

Claims (1)

1. 8404762-0 PATENTKRAV _ Förfarande för påföring av ett ytskikt på föremål av aluminium och aluminiumlegeringar. k ä n n e t e c k n a d därav. att föremålets yta belågges elektrolytískt med etl manganskikt varefter det med manganskíkt belagda föremålet underkastas en oxíderingsbehandling i vattenånga. sedan en nitreríngsbehandling iammoníak, båda vid en temperatur av 753 - B33 K. sammanlagda tiden 0.5 - 6.0 timmar. så att manganskiktet strukturellt förbíndas med föremålet.1. 8404762-0 CLAIMS _ Procedure for applying a surface layer to aluminum and aluminum alloy articles. k ä n n e t e c k n a d thereof. that the surface of the object is electrolytically coated with a manganese layer, after which the object coated with manganese layer is subjected to an oxidation treatment in water vapor. then a nitriding treatment in ammonia, both at a temperature of 753 - B33 K. total time 0.5 - 6.0 hours. so that the manganese layer is structurally connected to the object.
SE8404762A 1984-09-24 1984-09-24 Procedure for applying a surface layer to objects of aluminium or aluminium alloy SE445933B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE8404762A SE445933B (en) 1984-09-24 1984-09-24 Procedure for applying a surface layer to objects of aluminium or aluminium alloy
AU49641/85A AU4964185A (en) 1984-09-24 1985-09-24 Coating process
EP19850905002 EP0194310A1 (en) 1984-09-24 1985-09-24 Process for forming a surface layer on aluminum and aluminum alloy articles and so formed articles
PCT/SE1985/000367 WO1986001836A1 (en) 1984-09-24 1985-09-24 Process for forming a surface layer on aluminum and aluminum alloy articles and so formed articles
DK245986A DK245986D0 (en) 1984-09-24 1986-05-26 COATING PROCESS
FI862191A FI862191A (en) 1984-09-24 1986-05-26 BELAEGGNINGSFOERFARANDE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8404762A SE445933B (en) 1984-09-24 1984-09-24 Procedure for applying a surface layer to objects of aluminium or aluminium alloy

Publications (3)

Publication Number Publication Date
SE8404762D0 SE8404762D0 (en) 1984-09-24
SE8404762L SE8404762L (en) 1986-03-25
SE445933B true SE445933B (en) 1986-07-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SE8404762A SE445933B (en) 1984-09-24 1984-09-24 Procedure for applying a surface layer to objects of aluminium or aluminium alloy

Country Status (1)

Country Link
SE (1) SE445933B (en)

Also Published As

Publication number Publication date
SE8404762D0 (en) 1984-09-24
SE8404762L (en) 1986-03-25

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