Coating processes – With pretreatment of the base – Etching – swelling – or dissolving out part of the base
Patent
1979-03-22
1980-07-15
Mack, John H.
Coating processes
With pretreatment of the base
Etching, swelling, or dissolving out part of the base
204 32R, 204 38A, 204 57, C25D 534
Patent
active
042129079
ABSTRACT:
This invention is a method for etching a molybdenum or molybdenum-rich alloy surface to promote the formation of an adherent bond with a subsequently deposited metallic plating. In a typical application, the method is used as a pre-treatment for surfaces to be electrolessly plated with nickel. The pre-treatment comprises exposing the crystal boundaries of the surface by (a) anodizing the surface in acidic solution to form a continuous film of gray molybdenum oxide thereon and (b) removing the film.
REFERENCES:
patent: 2313756 (1943-03-01), Loose
patent: 3290174 (1966-12-01), Kendall
patent: 3446715 (1969-05-01), Frey
patent: 3935345 (1976-01-01), Lema
patent: 4055472 (1977-10-01), Freshcorn
patent: 4069110 (1978-01-01), Babuian et al.
patent: 4101386 (1978-07-01), Dotzer
Hamel Stephen D.
Leader William
Lupo R. V.
Mack John H.
The United States of America as represented by the United States
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