SEDL / STP / STP543-EB / STP38926S

Electrochemical Techniques

Dull, DL
Member of technical staff and section manager, The Aerospace Corp., El Segundo, Calif.

Raymond, L
Member of technical staff and section manager, The Aerospace Corp., El Segundo, Calif.

Pages: 14    Published: Jan 1974

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Abstract

An electrochemical test method is proposed for determination of the susceptibility of materials to internal hydrogen embrittlement (IHE). The method is based on the assumption that the relative susceptibility of a material depends both on the specific aqueous environment to which the material is exposed and to the dissimilar materials to which it is coupled. Potentiostatic techniques are employed to impress potential on sustained loaded notched round-bar specimens. The result is a plot of impressed potential versus time to failure; superpositioning of the resultant curves provides a basis for rating the relative susceptibility of various materials to IHE.