徐建平,苏航标,郭荻子,赵永庆,许并社,周廉.Ti35合金在含氟离子硝酸中电化学腐蚀行为[J].稀有金属材料与工程,2019,48(4):1124~1129.[Xu Jianping,Su Hangbiao,Guo Dizi,Zhao Yongqing,Xu Bingshe,Zhou Lian.Electrochemical corrosion behavior of Ti35 alloy in 6 M nitric acid containing fluoride ions[J].Rare Metal Materials and Engineering,2019,48(4):1124~1129.]
Ti35合金在含氟离子硝酸中电化学腐蚀行为
投稿时间:2018-08-02  修订日期:2018-09-21
中文关键词:  钛合金  氟离子  腐蚀行为  电化学
基金项目:Key R & D project in Shaanxi, P. R. China (2017ZDXM-GY-044)
中文摘要:
      Ti35合金具有优良的耐腐蚀性能,可在沸腾状态下高浓度的氧化性酸介质中进行长期工作,是商业后处理较为理想的候选材料。本文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6M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50ppm,进一步应用混合电位理论,解释合金耐蚀性转变的原因。
Electrochemical corrosion behavior of Ti35 alloy in 6 M nitric acid containing fluoride ions
英文关键词:Titanium alloy  fluoride ions  corrosion behavior  electrochemical
英文摘要:
      Ti35 alloy has excellent corrosion resistance and can serve in the high concentration of oxidizing boiling acid medium for a long time. It is an ideal candidate material for commercial reprocessing. In this paper, the open circuit potential (OCP), the potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) of Ti35 alloy were tested by electrochemical test system in 6M 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 50 ppm. Further, the mixed potential theory is adopted to explain the undermined mechanism of the changing corrosion resistance of the alloy.
作者单位E-mail
徐建平 太原理工大学新材料工程技术研究中心 xujp201208@163.com 
苏航标 西北有色金属研究院  
郭荻子 西北有色金属研究院  
赵永庆 西北有色金属研究院  
许并社 太原理工大学新材料工程技术研究中心  
周廉 西北有色金属研究院  
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