Metal post-processing protective agent for gold, silver, copper and nickel

The invention discloses a metal post-processing protective agent for gold, silver, copper and nickel. The metal post-processing protective agent for gold, silver, copper and nickel contains thiophenol with long-chain alkoxy, sulfydryl diphenyl sulfide with long-chain alkyl and derivatives of the sulfydryl diphenyl sulfide or thiophenol with long-chain alkyl amine and derivatives of the thiophenol and contains at least one solvent or surfactant which can effectively dissolve a selected compound, wherein the surfactant is ampholytic, nonionic or anionic surfactant. The metal post-processing protective agent can be used for effectively preventing gold, silver, copper and nickel from being oxidized, discolored and corroded, a preparation method is relatively simple, no pollution is generated in a production process, and the product performance is stable. 本发明公开了用于金、银、铜和镍的金属后处理保护剂，用于金、银、铜和镍的金属后处理保护剂，包含选自带有长链烷氧基的苯硫酚或带有长链烷基的巯基苯硫醚及其衍生物或带有长链烷基胺的苯硫酚及其衍生物，并含有能有效溶解所选化合物的至少种溶剂或表面活性剂，所述表面活性剂为两性、非离子或阴离子表面活性剂。本发明有效防止金、银、铜和镍被氧