前处理要去除物件上的油脂,污秽物和氧化层等, 为进一步表面处理作准备。前处理质量的鉴定主要是前处理后表面清洁度的判定。一、用“表面水湿润现象”判断脱脂清洗效果材料表面去除有机物油脂的污染是表面处理技术中的一个主要问题,脱脂清洗的效果常用“水湿润现象”来判断。 Pre-treatment to remove grease, grime and oxide, etc., in preparation for further surface treatment. Identification of the quality of pre-treatment is mainly the determination of the surface cleanliness after pretreatment. First, with the “phenomenon of surface water wetting,” determine the degreasing cleaning effect Removal of organic material grease pollution on the surface of the surface treatment technology is a major problem, the effect of degreasing cleaning commonly used “water wet phenomenon” to judge.