Abstract: The factors influencing the performance of phosphate anticorrosive coating for non-oriented silicon were systematically studied.Aluminum dihydrogen phosphate was prepared with aluminum hydroxide and phosphoric acid as raw materials.Then added the right amount of additives，such as ammonium tartrate，silicon dioxide，and epoxy resin to prepare the liquid coating，which was coated on the surface of the silicon steel，and finally controlled a suitable drying temperature.The influences of various factors on the anti-corrosion performance of the coating were investigated through the salt spray test.Experiment results showed that under the conditions of the amount-of-substance ratio of phosphoric acid to aluminium hydroxide of 3.4∶1，ammonium tartrate dosage of 2%，silica dosage of 1%，epoxy resin of 5%，and drying temperature of 300 ℃，the coating material′s corrosion prevention effect was the best.

Key words: non-oriented silicon steel；anti-corrosion；environmental protection；phosphate, coating