Abstract
Abstract The effects of stress, pH, and solution temperature on stress corrosion cracking (SCC) of type 430 (UNS S43000) ferritic stainless steel have been investigated in 0.82 kmol/m3 acidic chloride and sulfate solutions using a constant load method. The steady-state elongation rate obtained from corrosion elongation curve (elongation vs time curve) shows a linear function of time to failure with a slope of −1.5 (as a function of stress) and with a slope of unity (as a function of pH and solution temperature under a constant stress condition). This implies that the steady-state elongation rate can be applied to type 430 as a parameter for prediction of time to failure as well as that of austenitic stainless steels already reported. Furthermore, the steady-state elongation rate becomes a parameter for the criterion on evaluation of SCC susceptibility. By using a linear equation and the criterion for evaluation of SCC susceptibility, critical values of pH and solution temperature on SCC under the present ...
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