Study on Corrosion Mechanism of Arc Sprayed Zn-Al-Mg Coatings by XRD and EIS

Zi Xin Zhu; Ai Jun Li; Bin Shi Xu

doi:10.4028/www.scientific.net/AMR.230-232.85

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 230-232Study on Corrosion Mechanism of Arc Sprayed...

Study on Corrosion Mechanism of Arc Sprayed Zn-Al-Mg Coatings by XRD and EIS

Abstract:

Cored wires and arc spraying were used to produce high Mg content Zn-Al-Mg alloy coatings on low carbon steel substrates. And the corrosion mechanism of the Zn-Al-Mg coatings was investigated comparing with Zn-Al alloy coatings by X-ray diffractometer (XRD) and Electrochemical impedance spectroscopy (EIS). The results show that, The Zn-Al-Mg coatings show higher electrochemical corrosion resistance in salt solution than Zn-Al coatings. With addition of Mg, the corrosion products can block off the pores in the Zn-Al-Mg coating, which is so-called self sealing, and thus prevent attack on the underlying steel substrate.

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Periodical:

Advanced Materials Research (Volumes 230-232)

Pages:

85-88

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.230-232.85

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Online since:

May 2011

Authors:

Zi Xin Zhu, Ai Jun Li, Bin Shi Xu

Keywords:

Arc Spraying, Corrosion Products, Electrochemical Corrosion, Electrochemical Impedance Spectroscopy (EIS), Self-Sealing, X-Ray Diffractometer, Zn-Al-Mg Coating

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