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Study on the Corrosion Resistance of Thermal Spraying Zinc AluminumCoating with High Aluminum Content

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  • State Key Laboratory of Special Surface Protection and Application Technology, Wuhan Research Institute of Material Protection, Wuhan 430030, China

Online published: 2025-07-10

Abstract

 In order to explore the corrosion resistance of zinc-aluminum coatings with high aluminum content, the thermal spraying technology was applied to produce three kinds of high-aluminum zinc-aluminum coatings. The corrosion resistance of zinc aluminum coatings with different aluminum contents were investigated by ultra-depth filed microscope, electrochemical polarization curves, electrochemical impedance spectroscopy (EIS) and X-ray diffractometer(XRD). Results showed that the Zn-containing coating first underwent the activation and dissolution of zinc during the corrosion process, and the corrosion products attached to the coating surface induced that the coating exhibited a weak self-sealing effect. Furthermore, owing to holding the cathodic protection of zinc and the passivation shielding effect of aluminum, the Zn-Al60 coating presented the optimal corrosion resistance among the three kinds of coatings.

Cite this article

ZHANG Yong-fa, GAO Ming-chuan, CHEN Tong-zhou, PAN Lin, WU Mian . Study on the Corrosion Resistance of Thermal Spraying Zinc AluminumCoating with High Aluminum Content[J]. Materials Protection, 2021 , 54(8) : 28 . DOI: 10.16577/j.cnki.42-1215/tb.2021.08.005

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