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

Abstract:

Article Preview

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.

Info:

Periodical:

Advanced Materials Research (Volumes 230-232)

Edited by:

Ran Chen and Wenli Yao

Pages:

85-88

DOI:

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

Citation:

Z. X. Zhu et al., "Study on Corrosion Mechanism of Arc Sprayed Zn-Al-Mg Coatings by XRD and EIS", Advanced Materials Research, Vols. 230-232, pp. 85-88, 2011

Online since:

May 2011

Export:

Price:

$35.00

[1] S. Kuroda, M. Takemoto. Ten year report of thermal sprayed Zn, Al, and Zn-Al coatings exposed to maine corrosion by Japan association of corrosion control, in Proceedings of the 15th International Thermal Spray Conference, 25-29 May 1998, Nice, France. p.1017.

DOI: 10.5006/1.3280677

[2] T. Lester, D.J. Kingerley, S.J. Harry, S.P. Matthews. Thermally sprayed composite coatings for enhanced corrosion protection of steel structures, in Proceedings of the 15th International Thermal Spray Conference, 25-29 May 1998, Nice, France. p.49.

[3] J.Q. Zhang, C.N. Cao. Corrosion and Protection (in Chinese), 19(1998), 3, p.99.

[4] Z.X. Zhu, Y. Liu B.S. Xu. Advanced Materials Research Vols. 154-155 (2011), p.1389.

[5] J.J. Suay, M.T. Rodriguez, K.A. Razzaq. The evaluation of anticorrosion automotive epoxy coatings by means of electrochemical impedance spectroscopy, in Progress in Organic Coatings, 46 (2003), p.121.

DOI: 10.1016/s0300-9440(02)00219-9

[6] Y. Li, L. Qu, F.H. Wang. Corrosion Science, 45(2003), p.1367.

In order to see related information, you need to Login.