Effects of various surface preparations on stress corrosion cracking of Type 310 stainless steel wires in boiling (154 C, 311 F) aqueous MgCl2 solutions were studied. Relatively large numbers of specimens were used, and the time-to-breaking data were found to follow "log-normal" behavior. Mean cracking times and statistical scatter were obtained from the data. Mean cracking times were found to vary by as much as a factor of four. Results suggest that the effect of the various surface preparations is related to the effect of surface roughness on the electrode processes, primarily the reduction kinetics. The greatest amount of statistical scatter was related to surface preparations which were prepared manually as opposed to chemical preparations. Scatter was not proportional to the mean cracking time.

Subject
Test methods, Yield stress, Magnesium chloride, Roughness, Wiring, Open circuits, Surface preparation, Stress, Film formation, Specimen preparation, Stainless steel, Risk reduction, Stress corrosion cracking
© 1968 National Association of Corrosion Engineers
1968
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