宋正成,贾淑果,周延军,宋克兴,米绪军,李周

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:北京有色金属研究总院
• 4:中南大学材料科学与工程学院

摘要(Abstract)：

通过静态全浸试验、扫描电镜(SEM)和电化学测试探讨了Cu-7Ni-7Al合金在人工海水中腐蚀性能。结果表明:在人工海水中,Cu-7Ni-7Al合金的腐蚀速率随浸泡时间的延长而降低,在浸泡144 h前迅速下降,由24 h时的0.0782 g·m~(-2)·h~(-1)降到144 h时的0.0253 g·m~(-2)·h~(-1),在144 h后趋向平稳;合金表面膜的紧密性和厚度逐渐增加,表明合金的耐蚀性能得到改善,但是也存在裂纹和点蚀;电荷转移电阻R_(ct)随着浸泡时间的延长而增加,由3.03×10~4Ω·cm~2增加至9.78×10~(4 )Ω·cm~2;在整个浸泡阶段,自腐蚀电位受表面膜状态影响而波动不明显,电流密度随浸泡时间延长而逐渐降低,在144 h前下降较快,由0 h时的20.13μA/cm~2降到144 h时的6.42μA/cm~2,在144 h后趋向稳定,于240 h达到最小,为5.81μA/cm~2。

关键词(KeyWords)： Cu-7Ni-7Al合金;腐蚀速率;极化曲线;交流阻抗;保护膜

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFB0301400);; 河南省基础与前沿技术研究项目(162300410049)

作者(Author): 宋正成,贾淑果,周延军,宋克兴,米绪军,李周

DOI: 10.13289/j.issn.1009-6264.2018-0382

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