pH对TA2在模拟海水中的腐蚀和再钝化行为的影响

Effect of pH on the Corrosion and Repassivation Behavior of TA2 in Simulated Seawater.

作者信息

Zhang Yingxiao, Yan Tingting, Fan Lin, Liu Zhiyong, Song Longfei, Li Xiaogang

机构信息

Corrosion and Protection Center, Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China.

National Materials Corrosion and Protection Data Center, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Materials (Basel). 2021 Nov 10;14(22):6764. doi: 10.3390/ma14226764.

DOI:10.3390/ma14226764

PMID:34832166

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8617934/

Abstract

The effect of pH on the corrosion and repassivation behavior of TA2 in simulated seawater was studied using electrochemical tests, immersion experiments, and surface morphology topology analysis. The results show that E and R increased while i and weight loss rate decreased as the pH of simulated seawater increased. The TA2 passive film was determined to be mainly composed of a large amount of TiO and a small amount of TiO. The repassivation function of TA2 can be expressed as = -0.1375 + 0.0532ln( - 1.241) for a simulated seawater pH of 8.2. The parameter b, which represents the slope of the potential-time curve during the friction electrode test, was used to evaluate the repassivation behavior of TA2. The increase in pH value was observed to promote the repassivation speed of the passive film, which is beneficial to the corrosion resistance of TA2.

摘要

采用电化学测试、浸泡实验和表面形貌拓扑分析等方法，研究了pH值对TA2在模拟海水中的腐蚀和再钝化行为的影响。结果表明，随着模拟海水pH值的升高，开路电位（E）和再钝化电位（R）升高，而腐蚀电流密度（i）和失重率降低。确定TA2钝化膜主要由大量的TiO和少量的TiO组成。对于pH值为8.2的模拟海水，TA2的再钝化函数可表示为 = -0.1375 + 0.0532ln( - 1.241)。用代表摩擦电极试验中电位-时间曲线斜率的参数b来评估TA2的再钝化行为。观察到pH值的增加促进了钝化膜的再钝化速度，这有利于提高TA2的耐蚀性。