Method of applying a firmly adherent metallic coating to titaniu

Details Method of applying a firmly adherent metallic coating to titaniu Method of applying a firmly adherent metallic coating to titaniu

1975-09-02

1977-05-17

Kendall, Ralph S.

Coating processes

Vacuum utilized prior to or during coating

Metal base

427309, 427328, 427405, 427422, 427427, 428660, C23C 700

Patent

active

040243036

ABSTRACT:
A structural part made of titanium and/or titanium alloy is given a surface treatment by sandblasting or chemical pickling and is provided with a protective film of a strong reducing agent such as a solution of a derivative of hydrazine or hydroxylamine which is applied directly over the titanium and immediately thereafter a slide layer of a nickel is applied over the reducing agent layer preferably by spraying. Complex derivatives of hydrazine and hydroxylamine in the form of salts may be applied during a pickling and descaling treatment. The adhesion of the wear-resistant layer of metal is improved by a refining at a temperature of about 300.degree. C to obtain an intermetallic bond between the titanium and nickel at the interfacial boundary.

REFERENCES:
patent: 2257186 (1941-09-01), Orthner
patent: 2833668 (1958-05-01), Dailey et al.
patent: 2935428 (1960-05-01), Huff
patent: 3339271 (1967-09-01), Durfee et al.
patent: 3505181 (1970-04-01), Marshall
patent: 3553015 (1971-01-01), Dohogne

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