用电化学方法和表面分析技术对铝青铜的脱成份腐蚀行为进 行研究.结果表明，铝青铜系合金中亚稳态的β相与α相基体相比，具有明显 的优先腐蚀倾向，这主要是亚稳的β相组织的含Al量高于α相造成的.在阳极活 性溶解区，由于β相中的Al元素溶解造成合金表面产生了点蚀坑，在阳极活化-钝化转 化区β相中的Al元素大量溶解，β相腐蚀严重.β相溶解电位正移接近α 相溶解电位，α相开始发生腐蚀，在极限电流区，材料表面α相成为富铝相(即阳 极区)，也发生严重的脱铝腐蚀，α相和β相中的其它合金元素也发生腐蚀脱落.
The corrosion behavior of Al-bronze in 3.5% NaCl so lution has been investigated by electrochemical methods and surface analysis tec hniques.The results indicated that the metastable β phase suffers a dealumi nization attack superior to the α matrix in the Al-bronze alloy because the β phase own more Al content than that of the α matrix.In the active d issolution section,the impingement appearing owns to the Al element dissolution of the β phase.In the active -passive translation section,most of the Al in the β phase dissolve.The dissolution potential of the phase β moves p ositively and the α matrix begins to dissolve.In the limiting current secti on,the α matrix is the rich Al phase,the anodic section, and suffers seriou s dealuminization corrosion.
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