Insight into the effect of applied potential on the passive behavior of commercially pure titanium in a simulated proton exchange membrane water electrolysis environment
作者
单位
1Key Laboratory for Corrosion and Protection of The Ministry of Education (MOE)、Institute for Advanced Materials and Technology、University of Science and Technology Beijing、Beijing 100083、China 2National Materials Corrosion and Protection Data Center、Institute for Advanced Materials and Technology、University of Science and Technology Beijing、Beijing 100083、China
关键词
收录来源
International Corrosion Congress · 第22届国际腐蚀大会
摘要
The correlation between applied potentials and the passive films of commercially pure titanium (CP -Ti) in a simulated proton exchange membrane water electrolysis (PEMWE) environment was investigated. In the first passive region, the passive film formed at 1 V exhibited superior overall p erformance. The values of ND were positively correlated with the applied potentials. The oxygen vacancy diffusivities were determined to be on the order of 10 –17 cm2·s–1. The average valences of the passive films were positively linear with the applied pot entials. As further increasing the potential, due to the intense OER and consequent growth, the oxide ratios and average valences of the passive films increased. The corrosion induced by accelerated stress cycle (ASC) tests was slight and crystallographica lly oriented. After increasing the frequency of potential change, the total Ti oxides were slightly less than those of 2.5 V.