Non-equilibrium coatings were prepared from Zn-Al-Mg-RE-Si powder core spun alloy by electric arc spraying, and the corrosion resistances of non-equilibrium coatings were investigated by copper accelerated acetic acid salt spray test (CASS), mass-loss test, XRD, SEM, polarization curves and electrochemical impedance spectroscopy. The results show that the obtained Zn-Al-Mg-RE-Si coatings are non-equilibrium texture like glassy state but not amorphous texture, and their corrosion rate is obviously slower than that of normal coatings due to large quantity of compact corrosion products attaching to the surface of coatings and preventing breakage of coatings, which indicates the self-sealing effectiveness of non-equilibrium coatings. While the corrosion potential of non-equilibrium coatings is more positive than that of normal coatings, and the corrosion current is only half of that of normal coatings. Furthermore, the charge-transfer resistance is twice as big as that of normal coatings which shows that the corrosion resistance of non-equilibrium coatings is superior to that of normal coatings.