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Título: | EIS study of the corrosion behaviour of zinc-based coatings on steel in quiescent 3% NaCl solution. Part 1: Directly exposed coatings |
Autor: | Barranco, Violeta CSIC ORCID ; Feliú Jr., S. CSIC ORCID ; Feliú Jr., S. CSIC ORCID | Palabras clave: | Zinc Metal coatings Electrochemical correlation EIS |
Fecha de publicación: | 2004 | Editor: | Elsevier | Citación: | Corrosion Science 46 (9): 2203-2220 (2004) | Resumen: | The possibilities offered by the EIS technique for studying the progress of corrosion in several types of galvanised coatings were investigated. Corrosion tests were performed in a 3 wt.% NaCl aqueous solution, at approximately neutral pH, without stirring and in contact with the air. A tendency was seen towards an electrochemical overestimation of the corrosion values of essentially pure zinc and Zn-5%Al (Galfan) coatings compared with the gravimetric reference values. In contrast, the opposite tendence was revealed with the Zn-10%Fe (Galvanneal) coating. These deviations have made it necessary to use empirical values of the constant B of the Stern-Geary equation. The approximately linear progress of the attack with immersion time suggests a slight barrier effect of the corrosion products layer. © 2004 Elsevier Ltd. All rights reserved. | URI: | http://hdl.handle.net/10261/114785 | DOI: | 10.1016/j.corsci.2003.09.032 | Identificadores: | doi: 10.1016/j.corsci.2003.09.032 issn: 0010-938X |
Aparece en las colecciones: | (CENIM) Artículos |
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