前言用抛丸或喷砂的方法除去精铸件毛坯上的氧化皮,是精铸件磷化的一项重要准备工作。但是在弹丸或砂粒不易到达之处,往往出现除不掉氧化皮的“死角”(例如深孔件内表面)。为此,我厂常在磷化后采取酸洗或电解酸洗的方法以补充除去之。然而却产生了许 Preface The use of shot blasting or sandblasting method to remove the oxide castings rough castings is phosphating an important preparatory work. However, where the projectile or grit is hard to reach, “dead spots” (such as the inner surface of the deep-hole part) that do not shed oxide scale often appear. To this end, I often take the factory after phosphating pickling or electrolytic pickling method to supplement it. However, it produced a promise