Corrosion Behavior and Mechanism of WC-12Co Coating in Salt Spray Environment
摘要
WC-based wear-resistant coatings are usually corroded in salt spray environment, which seriously affects their performances. In this work, the corrosion behavior and corrosion mechanism of WC-12Co coating exposed to salt spray conditions were studied. The results showed that W2C and W phases were produced on the surface of WC-12Co coating via decarburization during spraying and participated in the corrosion process of the coating. The existence of pores was an important factor in the occurrence and development of coating corrosion. The Co in the WC-12Co coating was corroded to the most extent, followed by other components in the coating.