STRESS CORROSION CRACKING AND ANODIC BEHAVIOR OF AlSl 304 STAINLESS STEEL, INCONEL 600, AND INCOLOY 800 STRAINING IN BOILING NaOH SOLUTIONS.

The straining electrode technique was used to evaluate the stress corrosion cracking (SCC) susceptibility of AlSl 304 stainless steel in 20N NaOH solution, and of Inconel 600 Alloy and Incoloy 800 Alloy in boiling 17. 5N NaOH solution. The crack propagation rate estimated from the straining experiments correlated well with failure time measurements from previous constant load experiments. It was found that the straining electrode technique is a useful method for estimating, through short term experiments, parameter such as crack propagation rate, crack morphology, and repassivation rate, as a function of the electrode potential.