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http://hdl.handle.net/10773/19967
Title: | Initial stages of localized corrosion at cut-edges of adhesively bonded Zn and Zn-Al-Mg galvanized steel |
Author: | Yasakau, K. A. Kallip, S. Lisenkov, A. Ferreira, M. G. S. Zheludkevich, M. L. |
Keywords: | ZN(MG,AL) COATED STEEL MECHANISTIC APPROACH POLYMERIC COATINGS ZINC DELAMINATION RESISTANCE INHIBITION ALLOYS DEFECT MODEL |
Issue Date: | 2016 |
Publisher: | PERGAMON-ELSEVIER SCIENCE LTD |
Abstract: | The mechanisms of the initial stages of localized corrosion at cut edges were investigated for adhesively bonded Zn (Z) and Zn-Al-Mg (ZM) galvanized steel. The results provided strong evidence for the localized nature of corrosion of galvanized coatings at the cut edges and at the adhesive/zinc interface. In both cases a defined localized corrosion attack on zinc in Z sample was observed. On the contrary, in the case of the ZM specimen both zinc solid solution and eutectics exhibited local corrosion. The local attack at the adhesive/Z(ZM) interface was correlated with an anodic undermining process. It develops near the cut-edge surface and at the buried deep adhesive-zinc interface and results in adhesive disbonding in the buried interface. The electrochemical studies revealed that the corrosion kinetics at the metal cut-edges decreases during immersion, which could be due to formation of corrosion products on both steel and zinc surfaces. (C) 2016 Elsevier Ltd. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19967 |
DOI: | 10.1016/j.electacta.2016.06.045 |
ISSN: | 0013-4686 |
Publisher Version: | 10.1016/j.electacta.2016.06.045 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Initial stages of localized corrosion at cut-edges of adhesively bonded Zn and Zn-Al-Mg galvanized steel_10.1016j.electacta.2016.06.045.pdf | 5.79 MB | Adobe PDF |
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