In order to improve the corrosion resistance of the wrought aluminium alloy (6061 ) and die casting aluminium alloy ( YL102 ) for the base of communication filter module, powder was sprayed on its surface. The effect of coating type, module structure, treatment process ( module pre-processing, baking) on the film-forming corrosion resistance was studied. The results show that: the reasonable choice of different coating, proper rounding, narrow groove depth to width ratio and hole depth and the aperture ratio not greater than 3 , special function of surface transition processing, reasonable arrangements for powder processing technology can improve corrosion resistance of powder sprayed film-forming.