一、课题的提出黑色金属采用磷化打底,再涂防腐漆,一般是能得到比较满意的防腐效果的.同样一个产品采用喷砂予处理,其防腐质量就差别较大.我厂生产的钢质焊接药筒就是一例.由于焊接工艺不可避免地会产生气孔、凹坑等缺陷,为防止酸洗磷化处理过程中,残存于气孔、凹坑内化学物质对产品长期贮存的影响,我们将酸洗磷化工艺改为喷砂工艺,实践证明喷砂后再涂敷和磷化打底同样 First, the subject of the proposed use of phosphating black metal primer, and then coated with anti-corrosion paint, generally can get more satisfactory anti-corrosion effect. The same product is sandblasting to be treated, the preservative quality will vary greatly. Steel welding cartridge is an example .Because the welding process will inevitably produce pores, pits and other defects, in order to prevent the pickling phosphating process, remaining in the pores, pits of chemicals on the long-term storage of products, we will Pickling phosphating process to sandblasting process, the practice proved that after blasting and phosphating primer coating the same