黄铜在三种溶液中的电化学腐蚀行为研究

摘要

Electrochemical corrosion behaviors of brass(Cu70Zn30)in distilled water,normal saline and sim-ulated uterine solution were studied by polarization curves,cyclic voltammetry curves and electrochemical im-pedance spectra.Results showed that brass was the most prone to corrode in normal saline and the most difficult to corrode in distilled water.In distilled water,brass appeared passivation in a certain degree because of the for-mation of oxide film on the surface.In normal saline,the corrosion rate of brass was the largest and dezincifica-tion could be observed.In simulated uterine solution,the corrosion rate of brass was slower than in normal sa-line,but the sensitivity of dezincification of brass was increased.%利用极化曲线、循环伏安曲线和电化学阻抗谱等电化学方法，对块体黄铜（Cu70Zn30）在蒸馏水、生理盐水和模拟宫腔液中的电化学腐蚀行为进行了研究。结果表明：黄铜在蒸馏水中的耐蚀性最好，在生理盐水中的耐蚀性最差；在蒸馏水中，黄铜表面开始腐蚀时会形成氧化物薄膜而引起一定程度的钝化；在生理盐水中，黄铜腐蚀速率最大且出现了脱锌腐蚀；在模拟宫腔液中，黄铜的腐蚀速率小于生理盐水中的腐蚀速率，但脱锌腐蚀的敏感度增大。