Tsau Chun-Huei, Hsiao Rong-Wei, Chien Tien-Yu
Institute of Nanomaterials, Chinese Culture University, Huagang Road, 55, Shilin District, Taipei 11114, Taiwan.
Materials (Basel). 2020 Nov 16;13(22):5157. doi: 10.3390/ma13225157.
This paper investigates the effects of Ta content on the microstructures, hardness and corrosion behavior of as-cast CoCrFeNiTa alloys. The results indicate that the addition of Ta can change the microstructures of these alloys to dual-phased structures (FCC + HCP), as well as increasing their hardness. This study uses constant galvanostatic/potentiometric methods to measure the polarization curves of CoCrFeNiTa, CoCrFeNiTa and CoCrFeNiTa alloys in deaerated 1 M sodium chloride solution at different temperatures. Electrochemical impedance spectroscopy is also used to analyze these alloys in sodium chloride solution. The results indicate that the CoCrFeNiTa alloy has a eutectic structure and the highest hardness. Furthermore, although the CoCrFeNiTa alloy has the best corrosion resistance, the CoCrFeNiTa alloy has the best pitting resistance among these alloys.
本文研究了Ta含量对铸态CoCrFeNiTa合金微观结构、硬度和腐蚀行为的影响。结果表明，Ta的添加可将这些合金的微观结构转变为双相结构（FCC + HCP），同时提高其硬度。本研究采用恒电流/恒电位法测量CoCrFeNiTa、CoCrFeNiTa和CoCrFeNiTa合金在不同温度下的除气1 M氯化钠溶液中的极化曲线。还使用电化学阻抗谱对这些合金在氯化钠溶液中进行分析。结果表明，CoCrFeNiTa合金具有共晶结构且硬度最高。此外，尽管CoCrFeNiTa合金具有最佳的耐腐蚀性，但CoCrFeNiTa合金在这些合金中具有最佳的耐点蚀性。
