Improvement of corrosion resistance and mechanical properties in magnesium alloy by ceramic coating

采用溶胶-凝胶法对AZ80镁合金挤压板进行陶瓷包覆，研究了陶瓷薄膜形成的热处理条件对基板力学性能和耐腐蚀性的影响。在热处理条件下，采用溶胶-凝胶法将前驱体溶液制备成CeO2和MgO陶瓷薄膜，并对基板进行时效硬化。陶瓷涂层提高了试样的耐蚀性。采用溶胶-凝胶法制备陶瓷包覆镁合金，可以同时获得时效硬化和耐腐蚀性能。

Extruded plate of AZ80 magnesium alloy was coated with ceramics by sol-gel processing, and we investigated the effects of heat treatment conditions, under which the ceramic thin films were formed, on the mechanical properties and corrosion resistance of the base plate. Ceramic thin films(CeO2 and MgO) could be successfully formed from precursor solution by sol-gel processing under heat treatment conditions, under which the base plate was age-hardened. The corrosion resistance of specimens was found to be improved by the ceramic coatings. The simultaneous acquisition of age hardening and corrosion resistance in magnesium alloy coated with ceramics by sol-gel processing was possible.