Potential Response Analysis of Exponentially Decaying Polarizing Current of Electrode and its Use in the Study of Stress Corrosion Cracking(SCC)of Stainless Steel

摘要

A study on the potential response of exponentially decaying polarizing current of electrode was car-ried out.The appearance of critical point of the potential-time response of exponentially decayingcurrent was ensured from theoretical analysis,and this is the theoretical foundation of the criticalpoint method for the measurement of corrosion current of metals.The comparison of the corrosioncurrents measured by the critical point and static methods for the system of 321 stainless steel in0.5N HCI+0.5N NaCI solution at static state shows that the results agree very well.Finally.the tran-sient corrosion currents of 321 stainless steel in 0.5N HCI+0.5N NaCl solution at different strain levelare listed.