Two heats of Alloy 800 have been tested by the Strauss (ASTM A 262 Practice E) and the electrochemical potentiokinetic reactivation (EPR) methods to detect the tendency to inter-granular corrosion. Different treatments of the EPR data have been studied. The best criterion appears to be the calculation of the normalized reactivation charge, Pa⁠, and its representation as time function and in TTS-coordinates. The comparison between the sensitivity of both tests revealed the higher sensitivity of the EPR test for the lower degrees of sensitization (DOS) and its saturation for the higher DOS.

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National Association of Corrosion Engineers
1982
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