Cu基形状记忆合金在生理盐水中的缝隙腐蚀

Crevice corrosion of Cu based shape memory alloy in saline solution

采用浸泡实验和电化学测试技术对ＣｕＺｎＡｌ形状记忆合金在生理盐水中的缝隙腐蚀行为进行了研究．结果表明，缝隙试样的腐蚀率大于自由表面试样．缝隙试样腐蚀电位比自由表面试样低约３０ｍＶ。

The crevice corrosion behaviour of CuZnAl shape memory alloy in saline solution has been investigated with immersion test and electrochemical measurement techniques. The results show that corrosion rate of crevice specimen is higher than that of the free surface specimen. The corrosion potential of crevice specimen is less noble than that of the free surface specimen by 30 mV, which confirms that crevice corrosion is the more easily occurring type even in Cu based memory alloy.