Corrosion of the WC-12Co and enamel coatings in liquid Zn-55Al alloy at 640 °C
Source abstract
Abstract
Abstract Corrosion behavior of the WC-12Co and enamel coatings in liquid Zn-55Al alloy is investigated comparatively. Serious corrosion consumes over 40 μm of the WC-12Co coating after 100 h immersion. Co dissolution occurs firstly by forming Zn-Co solid solution and then intermetallic compounds. WC is decarburized and reacts with Al to form WAl5 at high temperature. The enamel coating suffers quite slight corrosion. Porous γ-Al2O3 layer develops at surface, which then reacts with the enamel to form a continuous CaAl4O7 interlayer that prevents the further invasion of Al and provides the high corrosion resistance.
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Research context
OpenAlex topics: Advanced materials and composites · High-Temperature Coating Behaviors · Advanced ceramic materials synthesis
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