J. Mater. Sci. Technol. ›› 1993, Vol. 9 ›› Issue (3): 195-198.

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

Yanliang HUANG Ming LU Chunan CAO Haichao LIN Ming LU Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,110015,China   

  • 收稿日期:1993-05-28 修回日期:1993-05-28 出版日期:1993-05-28 发布日期:2009-10-10

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

Yanliang HUANG Ming LU Chunan CAO Haichao LIN Ming LU Corrosion Science Laboratory,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang,110015,China   

  • Received:1993-05-28 Revised:1993-05-28 Online:1993-05-28 Published:2009-10-10

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摘要： <正> 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.

Abstract: 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 decaying current was ensured from theoretical analysis,and this is the theoretical foundation of the critical point method for the measurement of corrosion current of metals.The comparison of the corrosion currents measured by the critical point and static methods for the system of 321 stainless steel in 0.5N 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 level are listed.

Key words: exponentially decaying current, polarization, corrosion current