稀土对挤压态Cu-7Ni-7Al-2Fe-2Mn合金耐蚀性能影响

发布时间：2019-01-15 23:34

【摘要】：研究了稀土元素对Cu-7Ni-7Al-2Fe-2Mn合金耐海水浸泡腐蚀性能的影响。结果表明,合金以均匀腐蚀为主,当浸泡时间小于48 h时(12,24和48 h),合金腐蚀速率对稀土含量敏感度较高,24 h时稀土含量0.0000%,0.0146%和0.0352%的合金腐蚀速率分别为0.1720,0.1311和0.1065 g·m~(-2)·h~(-1),随着稀土含量增加,敏感度降低,24 h时稀土含量0.0000%,0.0146%和0.0352%的合金腐蚀速率相差分别为0.1311,0.0328 g·m~(-2)·h~(-1),分别降低42%和15%;经96和168 h浸泡后,稀土元素含量对合金腐蚀速率没有明显改善,腐蚀速率均在0.0300 g·m~(-2)·h~(-1)左右;合金腐蚀表面钝化膜质量随稀土元素含量增加而提高,48 h前稀土含量越高,钝化膜质量越高,48 h后稀土对钝化膜影响较小;随稀土添加合金电化学性能提高,稀土含量0.0352%时合金电荷转移电阻Rt最大,达到1.651×10~4Ω·cm~2,钝化膜对基体保护作用最好。
[Abstract]:The effect of rare earth elements on the corrosion resistance of Cu-7Ni-7Al-2Fe-2Mn alloy to seawater immersion was studied. The results show that the alloy is mainly uniformly corroded. When the immersion time is less than 48 h, the corrosion rate of 1224 and 48 h), alloys is sensitive to the rare earth content, and the rare earth content of the alloy is 0.0000 when the immersion time is less than 48 h. The corrosion rates of 0.0146% and 0.0352% alloys were 0.1720% 0.1311 and 0.1065 g m-2 h-1, respectively. The sensitivity decreased with the increase of rare earth content. The difference of corrosion rate between 0.0146% and 0.0352% is 0.1311U 0.0328 g m-2 h ~ (-1), which is decreased by 42% and 15%, respectively. After immersion for 96 h and 168h, the corrosion rate of the alloy was not obviously improved by the content of rare earth elements, and the corrosion rate was about 0.0300 g m-2 h ~ (-1). The mass of passivation film increases with the increase of the content of rare earth elements. The higher the content of rare earth is before 48 h, the higher the quality of passivation film is, and the less the effect of rare earth on passivation film is after 48 h. With the increase of the electrochemical properties of the alloy, the charge transfer resistance (Rt) of the alloy is the largest when the content of rare earth is 0.0352, and the passivation film of 1.651 脳 10 ~ 4 惟 cm~2, has the best protective effect on the substrate.
【作者单位】：河南科技大学材料科学与工程学院;河南省有色金属材料科学与加工技术重点实验室;有色金属共性技术河南省协同创新中心;中南大学材料科学与工程学院;北京有色金属研究总院有色金属材料制备加工国家重点实验室;
【基金】：国家重点研发计划项目(2016YFB0301401) 国家基金委重点基金项目(U1502274) 河南省创新型科技团队项目(C20150014) 河南省高校科技创新团队支持计划项目(14IRTSTHN007)资助
【分类号】：TG146.11

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