| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8004174 | Journal of Iron and Steel Research, International | 2017 | 9 Pages |
Abstract
A new hot-dip galvanizing method was employed on hot-rolled low carbon steel. The effects of Al contents on microstructure, micro-hardness and corrosion resistance of Zn-Al alloy coatings were systematically investigated. Phase composition, microstructure and element distribution in Zn-Al alloy coatings were analyzed using X-ray diffraction (XRD) and electron probe micro analysis (EPMA), respectively. It is found that Al content (0. 6-6. 0 wt. %) in galvanizing zinc affects surface quality and adhesion between coatings and matrix in the newly developed method. In addition, with increasing Al content, micro-hardness significantly increased due to the increase in Zn-Al eutectoid phases. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) also revealed that increase in Al plays a noticeable role in improving the corrosion resistance of Zn-Al alloy coatings.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Zhi-feng Li, Yong-quan He, Guang-ming Gao, Jun-jian Tang, Xiang-jun Zhang, Zhen-yu Liu,