Publication Type Journal Article
Title Electrochemistry and surface analysis of the effect of benzotriazole on the cut edge corrosion of galvanized steel
Authors Juliana V. Custodio Silvia M. L. Agostinho AMP Simoes
Groups
Journal ELECTROCHIMICA ACTA
Year 2010
Month August
Volume 55
Number 20
Pages 5523-5531
Abstract The effect of benzotriazole (BTAH) in high concentration on the cut edge corrosion of galvanized steel in sodium chloride solution was studied, using electrochemical polarization, EIS. SVET and XPS. It was observed that there is the formation of a BTAH surface film on both steel and zinc, which polarizes anodically both metals, greatly reducing their electrochemical activity and changing the rate control from diffusion at the cathode to mixed control. The protective film undergoes numerous events of local activation and repassivation. The XPS data revealed that the BTAH becomes differently bound to zinc depending on the metal being under self-corrosion or coupled to steel. Although the BTAH reduces the electrochemical activity of both materials, there is significant reduction of the cathodic protection effect of zinc. (C) 2010 Elsevier Ltd. All rights reserved.
DOI http://dx.doi.org/10.1016/j.electacta.2010.03.072
ISBN
Publisher
Book Title
ISSN 0013-4686
EISSN
Conference Name
Bibtex ID ISI:000280422800001
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