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| Keywords | |
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acetic acid |
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corrosion |
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semiconductor |
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stainless steel |
| Authors | |
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CHENG XueQun |
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LI XiaoGang |
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DU CuiWei |
| PubMed | |
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Article by CHENG XueQun |
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Article by LI XiaoGang |
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Article by DU CuiWei |
Properties of passive film formed on 316L / 2205 stainless steel by Mott-Schottky theory and constant current polarization method
CHENG XueQun, LI XiaoGang &|DU CuiWei
Corrosion and Protection Center, Beijing Science and Technology University, Beijing100083, China
Semiconductor properties of the passive films formed on 316L and 2205 stainless steel were studied by Electrochemical Impedance Spectroscopy (EIS) in the high-temperature acetic acid. The results showed that the corrosion resistance of 2205 was higher than that of 316L, and the passive films formed on 316L and 2205 stainless steel showed p-type and n-type semiconductor behavior, respec-tively. Destruction and self-repairing of passive films were studied by using the constant current po-larization method. The results showed that for 316L, the self-repairing process would occur when the destruction was lower than the critical extent or it would not do; for 2205, the self-repairing process only happened in a short time when the destruction was in the same extent as 316L.
Supported by the National Natural Science Foundation of China (Grant No. 50871020)