Abstract: By means of cross-experiments,a new chemical oxidation process for promoting the corrosion resistance of the colourless oxidation film on alloy parts is investigated. A kind of high-stable,lower substance content solution,containing K2Cr2O7、HF and a little transitive metal nitrate,etc.,is prepared. The main technic targets of the film obtained have reached the criterion specified in DPS 9-45.This process can be used for the treatment of anti-corrosion and outerdecoration on various alluminium parts.