4.7 Article

An electrochemical, long-term immersion, and XPS study of 2-mercaptobenzothiazole as a copper corrosion inhibitor in chloride solution

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CORROSION SCIENCE
卷 83, 期 -, 页码 164-175

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2014.02.016

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Copper; EIS; Polarization; XPS; Interfaces; Neutral inhibition

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Using EIS, potentiodynamic curve, 3D-profilometry, and XPS measurements, 2-mercaptobenzothiazole (MBTH) was studied as a corrosion inhibitor for Cu in 3 wt.% NaCI solution. Electrochemical measurements showed that Cu corrosion in MBTH-inhibited solution follows kinetic-controlled and diffusion-controlled processes, that MBTH acts as a mixed-type inhibitor after 100 h of immersion and that it significantly reduces surface roughness after half a year of immersion compared with non-inhibited solution. It is also shown that the N atom and exocyclic S atom of the MBTH are involved in the molecule adsorption. The MBTH surface layer thickness was estimated to be 1.5 +/- 0.5 nm. (C) 2014 Elsevier Ltd. All rights reserved.

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