阅读说明：本技术 发黑磷化剂、金属件及其表面磷化处理方法 (Blackening phosphating agent, metal part and surface phosphating method thereof ) 是由 方招娣 于 2017-07-04 设计创作，主要内容包括：一种发黑磷化剂、金属件及其表面磷化处理方法。发黑磷化剂用于在金属件表面形成皮膜,以1000重量份计,其包括如下重量份数的成分：20-50份磷酸,1-4份间硝基苯磺酸钠,10-25份的硝酸锌,1-3份柠檬酸,2-10份钨酸钠,0.1-1.0份硝酸镍,5-10份氧化锌,0.5-2份氟硼酸钠和余量水。发黑磷化剂形成的膜层结晶致密,发黑发亮,具有良好的耐蚀性、装饰性。(A blackening phosphating agent, a metal piece and a surface phosphating method thereof. The blackening phosphating agent is used for forming a coating on the surface of a metal piece and comprises the following components in parts by weight in 1000 parts by weight: 20-50 parts of phosphoric acid, 1-4 parts of sodium m-nitrobenzenesulfonate, 10-25 parts of zinc nitrate, 1-3 parts of citric acid, 2-10 parts of sodium tungstate, 0.1-1.0 part of nickel nitrate, 5-10 parts of zinc oxide, 0.5-2 parts of sodium fluoborate and the balance of water. The film formed by the blackening phosphating agent has compact crystallization, blackness, brightness, good corrosion resistance and decoration.)