Corrosion of the WC-12Co and enamel coatings in liquid Zn-55Al alloy at 640 °C

•Enamel coating provides higher corrosion resistance than WC-12Co coating.•Co-Zn solid solution forms firstly at the corrosion front of the WC-12Co coating.•Dissolution of Co-Al, Co-Zn phase and decarburization of WC degrade WC-12Co.•γ-Al2O3 grows on enamel coating can delay Ca dissolution and form...

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