SE8803881A - - Google Patents

Info

Publication number
SE8803881A
SE8803881A SE8803881A SE8803881A SE8803881A SE 8803881 A SE8803881 A SE 8803881A SE 8803881 A SE8803881 A SE 8803881A SE 8803881 A SE8803881 A SE 8803881A SE 8803881 A SE8803881 A SE 8803881A
Authority
SE
Sweden
Prior art keywords
melt immersion
ions
metallising
acid solution
temperature
Prior art date
Application number
SE8803881A
Other versions
SE8803881A0 (en
SE8803881D0 (en
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 filed Critical
Publication of SE8803881A publication Critical patent/SE8803881A/xx
Publication of SE8803881D0 publication Critical patent/SE8803881D0/en
Publication of SE8803881A0 publication Critical patent/SE8803881A0/en

Links

Classifications

    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/30—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also trivalent chromium
    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

A process for the chemical treatment of metal components preferably consisting of ferrous materials in a chromic acid solution before metallising by melt immersion, in particular before melt immersion aluminising. The treatment takes place between the cleaning of the surface and the melt immersion metallising in order to ensure and improve the wettability. The metal components, cleaned according to known processes up to the "metallically clean" state, are immersed for at least 60 seconds at a temperature of 310...355 K in a chromic acid solution having the parameters 3...45 g/l of CrO3, at least 0.06 g/l of Cr<3+> ions and at least 0.04 g/l of Fe<3+> ions and dried at a temperature of at least 350 K.
SE8803881A 1988-03-14 1988-10-28 Process for chemical treatment of metal objects SE8803881A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD31365888A DD270092A1 (en) 1988-03-14 1988-03-14 METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS

Publications (3)

Publication Number Publication Date
SE8803881A true SE8803881A (en) 1988-10-28
SE8803881D0 SE8803881D0 (en) 1988-10-28
SE8803881A0 SE8803881A0 (en) 1989-09-15

Family

ID=5597621

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8803881A SE8803881A0 (en) 1988-03-14 1988-10-28 Process for chemical treatment of metal objects

Country Status (8)

Country Link
JP (1) JPH01290777A (en)
BE (1) BE1001732A6 (en)
DD (1) DD270092A1 (en)
DE (1) DE3835393A1 (en)
FR (1) FR2628443A1 (en)
NL (1) NL8802867A (en)
PL (1) PL278173A1 (en)
SE (1) SE8803881A0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19758140A1 (en) * 1997-12-19 1999-07-08 Mannesmann Ag Process for producing composite metal products

Also Published As

Publication number Publication date
NL8802867A (en) 1989-10-02
BE1001732A6 (en) 1990-02-20
SE8803881A0 (en) 1989-09-15
DD270092A1 (en) 1989-07-19
FR2628443A1 (en) 1989-09-15
PL278173A1 (en) 1989-12-11
DE3835393A1 (en) 1989-09-28
JPH01290777A (en) 1989-11-22
SE8803881D0 (en) 1988-10-28

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