Abstract

The corrosion behavior of Zn and 55%Al-Zn alloy coatings was studied by salt spray test which is designed to simulate the practical service situation, coupling with measurments of polarization curves and electrochemical impedance spectroscopy(EIS) as well. While corrosion products were characterized by XRD. The results show that the corrosion rate of two coatings exhibited different trends during the test. Compared with Zn coating, 55%Al-Zn alloy coating had better corrosion resistance,which may be related to the different composition and microstructure of coatings and corrosion products formed at different test stages.

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