(19)
(11) EP 0 546 756 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.11.1993 Bulletin 1993/45

(43) Date of publication A2:
16.06.1993 Bulletin 1993/24

(21) Application number: 92310956.5

(22) Date of filing: 01.12.1992
(51) International Patent Classification (IPC)5: C23C 4/06, C23C 4/12, C23C 24/08, C23C 4/10
(84) Designated Contracting States:
CH DE FR GB IT LI NL SE

(30) Priority: 12.12.1991 US 805987

(71) Applicant: GENERAL ELECTRIC COMPANY
Schenectady, NY 12345 (US)

(72) Inventors:
  • Beltran, Adrian Maurice
    Ballston Spa, New York 12020 (US)
  • Spriggs, Donald Robert
    Schenectady, New York 12309 (US)

(74) Representative: Pratt, Richard Wilson et al
London Patent Operation G.E. Technical Services Co. Inc. Essex House 12/13 Essex Street
London WC2R 3AA
London WC2R 3AA (GB)


(56) References cited: : 
   
       


    (54) Pre-oxidation of alloy powder coatings


    (57) Corrosion- and erosion-resistant coatings are thermal spray deposited onto metallic substrates, especially Co- and Ni-containing alloys, by thermal spray depositing metal particles partially pre-oxidized prior to application the metal substrate to be protected. Coatings rich in desired protective oxide and reduced non-protective, voluminous oxides result.





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