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�ؼ���� ؽ�� 5052��Ͻ� ��ʴ �Ը�ʴ��λ

Abstract�� Effect of trace heavy metal ions,e.g.,Cu~(2+) and Fe~(3+),on the corrosion behavior of aluminum alloy 5052 immersed in(70 ��) deaerated artificial seawater were investigated in terms of similar corrosion occurring in low-temperature multi-effect distillator.The polarization curves showed that,trace heavy metal ions(10~(-9) level) in the solution could result in the corrosion potential shifted positively,due to the deposition of heavy metal ions on the surface of aluminum alloy.But the pitting potential did not change with the content variation of heavy metal ions.This indicated that the heavy metal deposition could not influence the surface natural oxide film of aluminum alloy at the initial corrosion stage.The corrosion weight loss results showed that as the destruction of oxide film by chloride ions,the galvanic coupling of deposition metal and aluminum substrate will accelerate the subsequent corrosion process.

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Received 2010-03-15; published 2010-03-15

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�Ʒ��;��;.�ؽ��Ӷ�5052��Ͻ��ʴ��ܵ�Ӱ��[J]. ��ѧ��ҵ�빤��, 2010,27(2): 173-176

YUN Feng-ling,XU Ke.Effect of Heavy Metal Ions on the Corrosion of Aluminum Alloy 5052[J]. Chemcial Industry and Engineering, 2010,27(2): 173-176

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