Aiming at the problem of rusting and peeling in household appliances sprayed metal parts during production and use,through the analysis of the film forming principle of conventional acidic silane and water-free alkaline silane,the anti-rust ability test and practice comparison of the workpieces treated by the two processes.The results show that in the alkaline silane pretreatment environment,the anti-rust ability of the workpiece was greatly improved compared with that in the acidic silane environment,which can better solve the problem of easy rust and powder explosion of the workpiece.At the same time,the water-free alkaline silane process can spare the washing process after silane,and the workpiece pre-treatment process is reduced from 9 processes to 6 processes,saving energy and reducing consumption.Therefore,the use of water-free alkaline silane can help enterprises optimize the spraying process and improve the cost.