在零件表面上镀渗一层铝能提高耐蚀性,这是人所共知的。但是,由于铝很活泼,用常规电镀方法镀铝十分困难,而用蒸镀法镀铝附着性又很差。国外在七十年代末开始研究用离子镀渗的方法进行铝的镀渗,并逐步在生产中得到应用。如美国Douglus 公司用大型离子镀设备进行螺母、螺栓的离子 It is well-known that a layer of aluminum is coated on the surface of a part to improve corrosion resistance. However, since aluminum is very lively, it is very difficult to plate aluminum by the conventional plating method, and the aluminum plating adhesion method is very poor. Abroad in the late seventies began to study the use of ion plating osmosis infiltration of aluminum, and gradually applied in production. Such as the United States Douglus large ion plating equipment for nuts, bolts of ions