Abstract
Due to the complexity and high cost, the common doping method is not suitable for the direct element doping on the surface of the Mg alloy. In this paper, antimony-doped potassium stannate powder was prepared by ATO and potassium hydroxide calcination for the first time; then, the antimony-doped stannate coating was prepared on the surface of AZ31B Mg alloy through chemical conversion. The coating was continuously dense and the corrosion potential of the coating was increased by about 214 mV. The corrosion current density was greatly decreased, and the contact resistance was as low as 54.8 Ω/cm.
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