Research on Crack Region’s Electrochemical Corrosion Performance in Hot-Dipping Galvanizing

Abstract:

The composition, microstructure and Tafel polarization curve of the coating layer in hot-dipping Zn-0.2%Mn alloy bath have been investigated through XRF, SEM and electrochemical workstation. It is found that Mn is unevenly distributed in the coating layer. It shows that Mn is mainly distributed in coating outside surface. It is also means that Mn is tend to combine with Fe, O other than with Zn. Tafel polarization curve were collected by using three electrode system, Tafel polarization curve shows the electrochemical corrosion performance on internal surface is worse than the outside surface of coating layer, in 3.5% NaCl solution. It also means Mn enrichment and oxidation on the outside surface of the coating layer have an obvious influence to its corrosion performance.

• Periodical: Applied Mechanics and Materials (Volumes 633-634)
• Pages: 125-128
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.633-634.125
• Online since: September 2014
• Authors: Gong Luo, Yuan Yuan, Yong Zhen Liu, Bei Huang, Rui Zhang, Shi Ning Li, Zong Min Zhou, Jian Min Zeng*
• Keywords: Corrosion Performance, Crack, Hot-Dipping Galvanizing

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