Influence of cerium content on the corrosion behavior of Al-Co-Ce amorphous alloys in 0.6 M NaCl solution
Influence of cerium content on the corrosion behavior of Al-Co-Ce amorphous alloys in 0.6 M NaCl solution
复制标题
Ce含量对Al-Co-Ce非晶合金在0.6 M NaCl溶液中腐蚀行为的影响
DOI：
10.1016/j.jmst.2019.03.014
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发表时间：
2019
影响因子：
10.9
通讯作者：
Wang J. Q.
中科院分区：
文献类型：
--
作者：
Zhang L. M.;Zhang S. D.;Ma A. L.;Umoh A. J.;Hu H. X.;Zheng Y. G.;Yang B. J.;Wang J. Q.
采用循环极化、莫特-肖特基和X射线光电子能谱等方法研究了Ce含量对Al-Co-Ce非晶态合金在0.6 MNaC l溶液中腐蚀行为的影响。结果表明，随着Ce含量的增加，Al-Co-Ce非晶态合金的开路电位呈下降趋势，当Ce含量为4at.%时，非晶态合金的钝化电流密度和施主密度均最低，表现出最好的耐蚀性，而过量的Ce会导致Al-Co-Ce合金的耐蚀性降低。此外，还发现低Ce含量有利于在Al-Co-Ce非晶态合金表面形成更具保护性的钝化膜，Al-Co-Ce合金在0.6 MNaC l溶液中的缓蚀反应随Ce含量的增加而发生变化，并对其原因进行了讨论。
The effect of cerium content on the corrosion behavior of Al-Co-Ce amorphous alloys in 0.6 M NaCl solution was investigated by cyclic polarization, Mott-Schottky and X-ray photoelectron spectroscopy techniques. Results indicated that the open circuit potential of Al-Co-Ce amorphous alloys displayed a decreased tendency with the increase in Ce content, and the amorphous alloy with 4 at.% Ce presented both the lowest passive current density and donor density indicating the best corrosion resistance, while adding excess Ce led to the reduced corrosion resistance of Al-Co-Ce alloys. Furthermore, it was found that a low Ce content is beneficial to the formation of a more protective passive film on Al-Co-Ce amorphous alloys, and the corrosion inhibition reactions of Al-Co-Ce alloys in 0.6 M NaCl solution were changed with the increase in Ce content and the detailed reasons were discussed.