used as the reductant for Chemical plating . A dense and uniform nicklephosphorus film can be obtained for both large equipment and tiny components;articles with complicated external shape of convex/concave lines or internal wall of deep-hollows, the sueface of nonmetallics such as plastic,ceramics, glass etc. The film prosses a good surface hardness and abrasion resistance. Widely used in electronics,aviation,mechanism,and petroleum fields. Also used as interface activator, M.W. moderater and thermostablizer for synthetic resines and additive for foods.