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| Corrosion Behaviors of Pure Aluminum in Simulated SO2Pollution Environment |
| Received:October 23, 2012 Revised:March 01, 2013 |
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| DOI： |
| KeyWord:SO2environment mass loss method EIS LEIS |
| Author | Institution |
| ZHOU He-rong |
China National Electric Apparatus Research Institute，Guangzhou，China |
| JIE Gan-xin |
China National Electric Apparatus Research Institute，Guangzhou，China |
| ZHAO Yue |
China National Electric Apparatus Research Institute，Guangzhou，China |
| LI Xiao-gang |
Beijing University of Science and Technology，Beijing，China |
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| Abstract: |
| The corrosion behavior and mechanism of1060aluminum in0.004mol/L Na2SO4 solution was investigated using SEM, mass loss, electrochemical impedance spectroscopy (EIS) and local electrochemical impedance spectroscopy (LEIS) method. The results showed that mass loss accords with exponential rule asC=A·tn after720h immersion. Surface observation showed that corrosion product is agglomerate and accidented; the corrosion product is made of alumina and aluminum sulfate hydrate. The EIS results revealed that the corrosion rate of 1060aluminum gradually becomes low with increase of immersion time. LEIS results indicated that the local electrochemical impedance on the specimen surface changes with the immersion time and the pitting has occurred. |
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