Emulsion for cold-rolled steel sheet and preparation method thereof

The invention discloses an emulsion for a cold-rolled steel sheet and a preparation method thereof, and the emulsion comprises the following components in percentage by weight: 20%-30% of polyethylene glycol monorricinoleate, 4%-6% of castor oil polyoxyethylene ether, 2%-4% of citric acid, 5%-7% of sebacic acid, 3%-6% of boric acid, 3%-5% of triethanolamine, 0.1%-0.3% of preservative and the balance of water. The total percentage is 100%. The emulsion provided by the invention has good lubricity, cooling property and corrosion resistance. 本发明公开了一种冷轧钢板用的乳化液及其制备方法，其中乳化液按重量百分比计，其由如下组分组成：聚乙二醇单蓖麻油酸酯20％-30％，蓖麻油聚氧乙烯醚4％-6％，柠檬酸2％-4％,癸二酸5％-7％,硼酸3％-6％,三乙醇胺3％-5％，防腐剂0.1％-0.3％,水加至100％。本发明的乳化液具有良好的润滑性、冷却性和耐腐蚀性。