1备耕前准备(1)维修养护的清洗(1)在清洗钢或铸铁零件时,一般用含苛性钠10%乳化剂0.2%的水溶液,加热到90℃以上,将零件煮洗30分钟左右。为提高去脂效果,要勤搅动溶液。为了避免碱对金属的破坏作用,用热碱水煮过的零件取出后,要用布或刷子净皂化物,最后用60~80℃的热水冲洗,自行干燥,带有小孔的零件用压缩空气吹干。 1 preparation before preparation (1) maintenance and cleaning (1) in the cleaning of steel or cast iron parts, generally with caustic soda 10% emulsifier 0.2% aqueous solution, heated to above 90 ℃, the parts boiled for about 30 minutes. In order to improve the degreasing effect, the solution should be stirred frequently. In order to avoid the damaging effect of the alkali on the metal, after removing the parts which have been boiled with hot caustic, we should use the cloth or the brush to purify the saponified material, and finally wash with hot water of 60 ~ 80 ℃, dry on its own, Compressed air blow dry.