摘要
采用电化学测试、浸泡实验、失质测试和扫描电镜观察研究不同钛含量的铜钛合金在3.5%(质量分数)NaCl溶液中的腐蚀行为。结果表明,溶解在铜基体中的钛改变了铜钛合金的腐蚀过程。纯铜试样呈现典型的活性-钝化-过钝化腐蚀行为。铜钛合金的阳极电流密度随着电势增加而不断增大,表明铜的活性溶解持续进行,这主要是由铜与钛之间的电势差造成的。钛含量的增加降低了铜钛合金的耐蚀性。
The corrosion behavior of the Cu-Ti alloys with different Ti contents in 3.5%(mass fraction)NaCl solution was investigated using electrochemical measurements,immersion tests,mass loss measurements and SEM observation.The results show that Ti dissolved in the Cu matrix changes the corrosion process of the alloys.Pure Cu sample exhibits a typical active–passive-transpassive corrosion behavior.The anodic polarization current densities of the Cu-Ti alloys steadily increase with increasing applied potential,indicating that active dissolution of copper proceeds due to the potential difference in the galvanic coupling of Cu and Ti.The increase of Ti content decreases the corrosion resistance of the Cu-Ti alloys.
作者
卫欢
侯利锋
崔言超
卫英慧
Huan WEI;Li-feng HOU;Yan-chao CUI;Ying-hui WEI(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Institute of Technology,Yangquan 045000,China)
基金
Project(51374151)supported by the National Natural Science Foundation of China
关键词
铜钛合金
动电位极化
质量损失
浸泡实验
Cu-Ti alloy
potentiodynamic polarization
mass loss
immersion test
