期刊
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
卷 71, 期 1, 页码 86-92出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/maco.201911048
关键词
Al-Mg; clustered pit; current transient; electrochemical noise; microelectrode
资金
- National Natural Science Foundation of China [51701047]
The clustered pitting corrosion process has been investigated by electrochemical noise measurement using two nominally identical Al-Mg microelectrodes in aerated 3.5 wt% NaCl solution (pH 3.5). Current transients associated with the metastable pitting were detected and the pits were examined by scanning electron microscopy (SEM) observation. The results show that two types of clustered pits can be characterized by current transients separately. Pit interaction is confirmed by one transient with multiple peaks. Considering the nonFaradic current and cathodic current of H-2 evolution inside the pit, the average volume determined from an integrated charge associated with individual single peak current transient is lower than that of actual pits, while the single peak transient count is more than that from SEM observation. It thus implies that reactivation of one metastable pit occurs and the relevant millisecond transient demonstrates only a single peak associated with nanopit for each reactivation. The results from this work shed insight into the use of statistical analysis of current transients to forecast the corresponding pit morphology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据