采用电化学方法研究了Cu-Zn-Al形状记忆合金及其BTA钝化处理试样在Hank's人工体液中的缝隙腐蚀行为。结果表明：在人工体液中，Cu-Zn-Al形状记忆合金的耐缝隙腐蚀性能优于未进行热处理的Cu-Zn-Al合金，其作用机理是单相马氏体组织改善了合金的电化学行为，抑制了活性溶解。缝隙腐蚀的发生是由于形成了金属离子浓差电池。经BTA钝化后，Cu-Zn-Al形状记忆合金的耐缝隙腐蚀性能得到改善。
The crevice corrosion of the benzotriazole(BTA) passive specimensof the shape memory alloy Cu-Zn-Al in Hank's artificial body fluid has been studied using electrochemical tests. The results show that the shape memory alloy Cu-Zn-Al exhibits better property than the annealed alloy Cu-Zn-Al. T he reason is that the martensite single phase in the alloy Cu-Zn-Al improves electrochemical property and inhibits active solution. The occurring of crevice corrosion is attributed to the metal ions concentration cell. BTA passivation improves the crevice corrosion resistance of the alloy.
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