The effect of zinc ions,magnesium ions,copper ions,nitrate ions,and other substances on the surface zirconium deposition and elemental changes of cold-rolled steel plates in a thin film pretreatment system mainly composed of fluorozirconate was studied using X-ray fluorescence qualitative full scan(XRF).Inductively coupled plasma emission spectrometer(ICP) was used to analyze the changes in ions before and after the reaction.Experiments have shown that adding zinc ions and nitrate ion to the tank solution,based on the presence of only fluorozirconate,can promote the hydrolysis of fluorozirconate and double the amount of zirconium deposition on the surface of the board;Adding magnesium and fluorine ions to the tank solution did not show a significant increase in the deposition of zirconium on the surface of the board,and even decreased.Fluorine ions improved the appearance of the board film to a certain extent;Adding copper ions and silane to the tank solution did not significantly change the amount of zirconium deposition on the surface of the board.However,in the elemental analysis,copper and silicon elements were added to the surface of the board,indicating their involvement in film formation.Silicon ions also have a certain improvement effect on the appearance of the board's film formation.