摘要
采用电化学测试系统测试了Ti35合金在含有不同氟离子浓度的6mol/L硝酸溶液中的开路电位(OCP)、极化曲线、电化学阻抗谱(EIS),探讨了氟离子对Ti35合金耐蚀性能的影响。结果表明:随着氟离子浓度的增加,合金耐蚀性下降,但总体而言合金仍具有良好的耐蚀性。影响合金耐蚀性转变的氟离子浓度临界值约为1.25 mmol/L,进一步应用混合电位理论,解释合金耐蚀性转变的原因。
The open circuit potential(OCP), potentiodynamic polarization curves and electrochemical impedance spectroscopy(EIS) of Ti35 alloy were tested by an electrochemical test system in 6 mol/L nitric acid solution containing fluoride ions and the effect of the fluoride ion on the corrosion resistance of Ti35 alloy was investigated. The results show that the corrosion resistance of the alloy decreases with the increase of fluoride concentration while the alloy still exhibits good corrosion resistance in general. The critical concentration of fluoride ions affecting the corrosion resistance of the alloy is about 1.25 mmol/L. Furthermore, the mixed potential theory was adopted to explain the undermined mechanism of the changing corrosion resistance of the alloy.
作者
徐建平
苏航标
郭荻子
赵永庆
许并社
周廉
Xu Jianping;Su Hangbiao;Guo Dizi;Zhao Yongqing;Xu Bingshe;Zhou Lian(Taiyuan University of Technology,Taiyuan 030024,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第4期1124-1129,共6页
Rare Metal Materials and Engineering
基金
Key Research and Development Project of Shaanxi Province(2017ZDXM-GY-044)
关键词
钛合金
氟离子
腐蚀行为
电化学
titanium alloy
fluoride ions
corrosion behavior
electrochemical
