化学镀镍(Ni-P)抗碱、有机酸、还原剂、盐溶液和石油环境,仅与氧化性酸起作用。Ni-P合金镀层优良的抗蚀性能应归因于Ni-P合金的非晶型结构和表面形成钝化膜层。非晶材料一般相对于它们的晶体材料有较好的抗蚀性能,因为这种非晶型材料没有加速腐蚀的晶粒边界。从含次磷酸钠的镀液中沉积的镍合金里磷的含量取决于槽液的化学性质和操作条件,磷含量影响合金的结构和性质,同时也能影响合金的抗蚀性能。 Duncan指出:采用大约3 mol/L的盐酸作重量损失腐蚀试验,含磷8±1％与10％～11％合金的抗蚀性能相差可大于一个数量级。Johnson and Morris Electroless nickel (Ni-P) anti-alkali, organic acids, reducing agents, salt solution and petroleum environment, only with the role of oxidizing acid. The excellent corrosion resistance of Ni-P alloy coatings should be attributed to the formation of a passivation film on the amorphous structure and surface of Ni-P alloys. Amorphous materials generally have good corrosion resistance relative to their crystalline materials because such amorphous materials do not have accelerated corrosion of the grain boundaries. The content of phosphorus in the nickel alloy deposited from the sodium hypophosphite-containing bath depends on the chemical and operating conditions of the bath. The content of phosphorus affects the structure and properties of the alloy and also affects the corrosion resistance of the alloy. Duncan pointed out that using about 3 mol / L hydrochloric acid as a weight loss corrosion test, the difference between the corrosion resistance of 8 ± 1% phosphorus and 10% ~ 11% alloys can be more than an order of magnitude greater. Johnson and Morris