硝酸银的回收方法很多,但往往由于工厂实验室条件和辅助药品的费用关系,使银的回收工作感到困难。为了工作方便和降低回收时所用辅助药品的费用,可以在氯化钠溶液中,用漂净的铁棒或铁片来还原氯化银为金属银。这个方法是根据金属表面的不均一性。在同一电解质溶液中,其表面上相邻的两个区域具有不同的电极电位,而构成了局部的微电池。 There are many ways to recover silver nitrate, but it is often difficult to recover the silver because of the laboratory laboratory conditions and the cost of the ancillary chemicals. In order to facilitate work and reduce the cost of auxiliary drugs used in recovery, silver chloride can be reduced to metallic silver in a sodium chloride solution by using a clean iron rod or iron plate. This method is based on the heterogeneity of the metal surface. In the same electrolyte solution, the two adjacent areas on the surface have different electrode potentials, and constitute a local micro cell.