Chemistry: electrical and wave energy – Processes and products
Patent
1993-10-07
1994-11-22
Gorgos, Kathryn
Chemistry: electrical and wave energy
Processes and products
204 98, 204128, 204129, C25B 104, C25B 116, C25B 100
Patent
active
053665988
ABSTRACT:
A metal surface is now described having enhanced adhesion of subsequently applied coatings. The substrate metal of the article, such as a valve metal as represented by titanium, is provided with a highly desirable surface characteristic for subsequent coating application. This can be initiated by selection of a metal of desirable metallurgy and heat history, including prior heat treatment to provide surface grain boundaries which may be most readily etched. In subsequent etching operation, the surface is made to exhibit well defined, three dimensional grains with deep grain boundaries. Subsequently applied coatings, by penetrating into the etched intergranular valleys, are desirably locked onto the metal substrate surface and provide enhanced lifetime even in rugged commercial environments.
REFERENCES:
patent: 3948736 (1976-04-01), Russell
patent: 4572770 (1986-02-01), Beaver et al.
Hayfield, Titanium as a Substrate for Electrodes; Birmingham, Eng.; pp. 1-11; FIGS. 1-13.
Carlson Richard C.
Ernes Lynne M.
Hardee Kenneth L.
Thomas David E.
Eltech Systems Corporation
Freer John J.
Gorgos Kathryn
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