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The Fe-Al/WC intermetallic composite coatings have been prepared by high velocity arc spraying(HVAS) technology on 20G steel and the oxidation performance of Fe-Al/WC composite coatings has been studied by means of thermogrativmetic analyzer. The results demonstrate that the kinetics curve of oxidation approximately follows the logarithmic law. The composition of the oxidized coating surface mainly is composed of A12O3, Fe2O3, Fe3O4 and FeO which distribute unevenly. The protective A12O3 film firstly forms and preserves the coatings from further oxidation.
The Fe-Al / WC intermetallic composite coatings have been prepared by high velocity arc spraying (HVAS) technology on 20G steel and the oxidation performance of Fe-Al / WC composite coatings has been studied by means of thermogrativmetic analyzer. The results demonstrate that the The composition of the oxidized coating surface mainly composed of A12O3, Fe2O3, Fe3O4 and FeO which distribute unevenly. The protective A12O3 film has forms and preserves the coatings from further oxidation.