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Study on Junction Corrosion of Magnesium Alloy Coupled With Aluminum Alloy and Protection Effects of Different Surface Treatment

JIANG Bai-ling,YUAN Fang,YUAN Sen,SHI Hui-ying,YUAN Bing(Xi'an University of technology,Shannxi,Xi'an,710048)  
The corrosion behaviors of magnesium alloy coupled with aluminum alloy were investigated by applying GB/T 10125-1997 test criteria and using contrast test in this paper.The results showed that the galvanic corrosion occurrs on magnesium alloy due to the lower electrode potential when the two alloys linked together,and the general corrosion was accelerated.The suitable surface treatments on magnesium alloy can reduce the corrosion and the galvanic corrosion effect is decreased.The Micro-arc Oxidation Coating was better than the other.
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