This article deeply investigates the influence of different process parameters on the electrochemical behavior of zirconium based conversion coatings,aiming to optimize the performance of zirconium based conversion coatings and enhance the corrosion resistance of metal materials.Galvanized sheet was used as the test substrate,the polarization curve was used to test and screen the optimal process conditions for the formation of zirconium conversion films,and the scanning electron microscope (SEM) was used to detect the microscopic morphology of the transformation films at different times and formation processes,so as to fully understand the influence of various process parameters on their electrochemical behavior during the pretreatment of zirconium films.Results showed that the optimal conditions for zirconium conversion film deposition were as follows:Zr F_6^(2-)concentration was 0.3 g/L,free fluorine was 1.5×10^(-5),processing time was 2~4 min,processing temperature was 40℃,p H value was 4.2,the corrosion resistance of galvanized sheet was the best;A conversion film of uniform size and tightly arranged zirconium complexes was formed and was in good condition.