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Comparison of corrosion behaviors between Ti-based bulk metallic glasses and its composites
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2018-04-07
Y.J. Yang, Z.S. Jin, X.Z. Ma, Z.P. Zhang, H. Zhong, M.Z. Ma, X.Y. Zhang, G. Li, R.P. Liu

The corrosion behaviors of the Ti-based bulk metallic glasses (Zr30.88Ti33.57Cu7Ni5.39Be23.16) as well as the in-situ Ti-based bulk metallic glass matrix composites (Zr28.92Ti42.22Cu6.57Nb6Be16.29) in 0.6 mol/L NaCl, 1 mol/L HCl and 0.5 mol/L H2SO4 solutions were analyzed. The potentiodynamic polarization analyses indicated a drastic increase in the current densities for all specimens in the NaCl and HCl solutions, which could be related to the passive breakdown caused by pitting corrosion. In contrast, no active-passive transition existed in the H2SO4 solution. SEM and EDS analyses were performed to clarify the morphologies and chemical states of the elements prior to and following electrochemical testing. The results demonstrated that both alloys exhibited entirely different corrosion behaviors in the chloride-containing and chloride-free solutions. The surfaces of the samples were locally damaged by a chloride-induced pitting process. Specifically for the composites, a selective dissolution occurred. In contrast, a low portion of corrosion occurred within the chloride-free media. The chemical compositions were identified as the main factor to affect the corrosion performance of the alloys.



中文翻译:

钛基块状金属玻璃及其复合材料腐蚀行为的比较

Ti基块状金属玻璃(Zr 30.88 Ti 33.57 Cu 7 Ni 5.39 Be 23.16)以及原位Ti基块状金属玻璃复合材料(Zr 28.92 Ti 42.22 Cu 6.57 Nb 6 Be 16.29)的腐蚀行为在0.6 mol / L NaCl,1 mol / L HCl和0.5 mol / LH 2 SO 4中解决方案进行了分析。电位动力学极化分析表明,所有试样在NaCl和HCl溶液中的电流密度都急剧增加,这可能与点蚀引起的被动击穿有关。相反,H 2 SO 4中不存在主动-被动过渡解决方案。在进行电化学测试之前和之后,进行了SEM和EDS分析以阐明元素的形貌和化学状态。结果表明,两种合金在含氯化物和无氯化物溶液中均表现出完全不同的腐蚀行为。样品的表面被氯化物诱导的点蚀过程局部损坏。专门针对复合材料,发生了选择性溶解。相反,在不含氯化物的介质中发生的腐蚀很少。化学成分被确定为是影响合金腐蚀性能的主要因素。

更新日期:2018-04-08
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