Method of determining susceptibility of alloys to stress corrosi

Details Method of determining susceptibility of alloys to stress corrosi Method of determining susceptibility of alloys to stress corrosi

1979-07-17

1980-08-12

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

204 58, 204195R, G01N 2742, G01N 308

Patent

active

042171806

ABSTRACT:
Accelerated testing method for determining the susceptibility of alloys to stress corrosion cracking. Test parts are anodized to form an oxide coating thereon. The anodized parts are deformed to a known amount of tensile strain sufficient to rupture the oxide. Microcracks created in the oxide coating occur at the situs of where stress corrosion cracks will occur in service. The parts are reanodized such as to anodically heal the microcracks and the reanodization current transient recorded. The rate of current decay during reanodization is indicative of the alloy's susceptibility to stress corrosion cracking.

REFERENCES:
patent: 3408270 (1968-10-01), Gentile
patent: 3419479 (1968-12-01), Klein
patent: 3437568 (1969-04-01), Hasselmann et al.
patent: 3710616 (1973-01-01), Smith et al.
patent: 4019129 (1977-04-01), Grau

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