期刊
APPLIED SURFACE SCIENCE
卷 289, 期 -, 页码 129-140出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2013.10.119
关键词
Corrosion inhibitor; H-2 SO4 solution; EIS; ECN; SEM
In this study, the corrosion inhibition properties of two similar heterocyclic compounds namely benzotriazole (BTA) and benzothiazole (BNS) inhibitors on copper in 1.0 M H-2 SO4 solution were studied by electrochemical techniques as well as surface analysis. The results showed that corrosion inhibition of copper largely depends on the molecular structure and concentration of the inhibitors. The effect of DC trend on the interpretation of electrochemical noise (ECN) results in time domain was evaluated by moving average removal (MAR) method. Accordingly, the impact of square and Hanning window functions as drift removal methods in frequency domain was studied. After DC trend removal, a good trend was observed between electrochemical noise (ECN) data and the results obtained from EIS and potentiodynamic polarization. Furthermore, the shot noise theory in frequency domain was applied to approach the charge of each electrochemical event (q) from the potential and current noise signals. (C) 2013 Elsevier B.V. All rights reserved.
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