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The role of alloying elements in the dissolution of aluminium sacrificial anodes was investigated . The effect of indium on the electrochemical performance of anode and the relationship between indium and impurities , such as silicon and iron, were studied. The distribution of indium in aluminium alloy was detected . The electrochemical behaviour of In-implanted aluminium alloy was also studied . The experimental results indicate that indium activates the surface of aluminium alloy and improves the electrochemical performance of alloy containing more amounts of impurity . Indium combines with silicon and iron.More satisfactory properties were obtained when the alloy's proportion of content of In to that of (Si+ Fe) is about 1 : (8 ~10). The electrochemical properties of Al alloy, especially the surface activity of the anode were improved by ion implantation . Indium segregates in the alloy . The amount of Si and Fe in the In-rich segregated phase is richer than that in the matrix. It is proposed that th 相似文献
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