Coating processes – Immersion or partial immersion – Metal base
Reexamination Certificate
2007-01-09
2007-01-09
Meeks, Timothy (Department: 1762)
Coating processes
Immersion or partial immersion
Metal base
C427S430100, C427S435000, C427S436000, C427S008000, C205S109000, C205S255000, C205S257000
Reexamination Certificate
active
10240148
ABSTRACT:
The invention concerns a method wherein the substrate (5) to be coated is immersed in an autocatalytic chemical deposit bath (4), for example nickel, contained in a stainless steel vessel (1) and wherein can be optionally mixed a suspended MCrAlY alloy, so as to form a metal deposit (nickel) wherein are optionally included powder particles. The invention is characterised in that, to provide a prolonged operation of the bath, it consists in measuring with a voltmeter (8) the difference of potential between the substrate (5) and a reference electrode (6) immersed in the bath (4), and in imposing between the substrate (5) and the vessel (1) an electric current produced by a generator (10), said current being adjusted by a regulator (11) so as to maintain said potential difference at a selected value.
REFERENCES:
patent: 4305792 (1981-12-01), Kedward et al.
patent: 4810334 (1989-03-01), Honey et al.
patent: 01 283377 (1989-11-01), None
patent: 01283377 (1989-11-01), None
International Search Report of PCT/FR01/00906, dated Jul. 30, 2001.
International Preliminary Examination Report of PCT/FR01/00906, dated Feb. 20, 2002.
Patent Abstract of Japan, Publication No. 01283377, Published Nov. 14, 1989, in the name of Brother Ind Ltd.
Bacos Marie-Pierre
Berger Eric
Girard Benoît
Josso Pierre
Abramowitz Howard
Christie Parker & Hale LLP
Meeks Timothy
Office National d'Etudes et de Recherches Aerospatiales
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