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熔制了不加稀土Re和加稀土Re的两种铝合金牺牲阳板材料。通过金相显微镜、扫描电镜和能谱分析,确定了铝合金的晶粒尺寸、偏析相数量及组成;采用恒电流方法,测定了牺牲阳极电化学性能和表面溶解状况。结果表明:Re的加入使铝合金晶粒变小,弥散相数量增加;Re改善了铝合金牺牲阳极的高温溶解性能;加 Re铝合金阳极高温性能优于未加Re阳极。
Two kinds of aluminum alloy sacrificial anode materials without fused Re and rare earth Re were melted. The grain size, segregation phase amount and composition of the aluminum alloy were determined by metallographic microscope, scanning electron microscopy and energy spectrum analysis. The electrochemical performance and surface dissolution of the sacrificial anode were measured by galvanostatic method. The results show that Re increases the grain size of aluminum alloy and increases the number of dispersed phases. Re improves the high temperature dissolution performance of sacrificial anode. The high temperature performance of aluminum alloy with Re is superior to that without Re anode.