喷漆工艺（Painting process）.docVIP

喷漆工艺（Painting process） Paint technology.Txt liar too much, fool obviously not enough. I was in charge of kiss your princess in the way to kill Longyou Zhanji River and climbing to the top of the tower. Painting process of paint shop I. degreasing 1, remove the black metal workpiece in the production process of surface oil, dip trough method. Lye cleaning formula: sodium hydroxide 4%, sodium phosphate 4%, phosphoric acid three sodium, 4% OP-10 emulsion, 0.3%, temperature 90~95 DEG C, treatment time 5~8 minutes. After the inspection method: after washing with a brush brush, visual oil whether to go clean. 2, remove the oil on the surface of non-ferrous metal workpiece, trough leaching method. KL-13 type oil removal and rust removal additives (the additive is white powder), the use of concentration: water ratio of 2%, the temperature is greater than 5 degrees (such as heating treatment speed up), time 5~10 minutes, bath pH value: 7. 3, plastic surface degreasing, trough leaching method. Use KL-16 type dewaxing oil removal powder, the use of concentration: water ratio of 5%, temperature 40~65 degrees, time 5~10 minutes. Two, cleaning (water cleaning after oil removal) Three, rust removal Acid rust removal is used to remove rust scale on steel surface. Pickling solution: 31% of industrial hydrochloric acid and 3% of corrosion inhibitor. Temperature: room temperature. The processing time is 3~8 minutes. After inspection, the method is: after washing, check whether there is rust or not. Four, cleaning (after rust cleaning with water) Five, table adjustment Used for surface treatment before phosphating, and then dipped in trough (white powder). When the bath solution is added at the rate of 1~3 kg / ton, stir it to dissolve. Table adjust the working conditions for the pH value of 7.5~9.5, temperature: normal temperature, time, half a minute. Six, phosphating Phosphating of iron and steel surface by zinc phosphating solution by dipping bath. WF phosphating agent is divided i