Method for protecting articles from hydrogen absorption by appli

Details Method for protecting articles from hydrogen absorption by appli Method for protecting articles from hydrogen absorption by appli

1991-07-19

1993-10-12

Owens, Terry J.

Coating processes

With pretreatment of the base

Heating or drying pretreatment

427327, 427355, 4273762, 4273764, 4273766, 427427, B05D 302

Patent

active

052523624

ABSTRACT:
A method is taught for protecting the surface of a metal subject to hydrogen embrittlement from hydrogen absorption. An adherent coating is formed on the surface of the metal substrate by heating the substrate, applying thereto a colloidal alumina suspension in a vaporizable carrier, and further heating said substrate and applied alumina suspension at an elevated temperature to form a protective alumina coating. Dopants may be employed to increase the inhibition of hydrogen diffusion through the alumina coating.

REFERENCES:
patent: 2934456 (1960-04-01), Schutt
patent: 3663280 (1972-05-01), Lee
patent: 3751296 (1973-08-01), Beer
patent: 3885063 (1975-05-01), Schachner et al.
patent: 4082900 (1978-04-01), Shimogori et al.
patent: 4614673 (1986-09-01), Bendig
patent: 4921731 (1990-05-01), Clark et al.
patent: 4935265 (1990-06-01), Pike
patent: 4987003 (1991-01-01), Schuster et al.
Nelson et al., "The Coating of Metals with Ceramic Oxides via Colloidal Intermediates", Thin Solid Films, vol. 81 pp. 329-337, 1981.

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