对硫化铅固体表面的氯络合-溶解行为进行了研究。溶液化学计算考察颗粒表面固体反应产物(PbCl2)的生成与溶解情况表明,饱和氯化钠介质中PbCl2主要以[PbCl4]2-络合物的形式存在于溶液中,氯离子组分总浓度[Cl-]T=0·918mol/L时,PbCl2能较好地呈固态晶体析出,[Cl-]T>0·918mol/L时PbCl2晶粒因氯络合作用而溶解。通过Tafel实验进一步分析了PbS固体表面的腐蚀溶解行为,结果显示,当CFe3+≤6×10-4mol/L时,腐蚀速度对Fe3+存在很强的依数性,浓度增加,腐蚀速度快速提高;CFe3+>6×10-4mol/L,有钝化现象发生。NaCl的加入,溶液相Cl-活度增加,PbCl2快速溶解,腐蚀反应加快。 Chloride complexation - dissolution behavior of solid surface of lead sulfide was studied. Solution stoichiometry to investigate the formation and dissolution of the solid reaction product (PbCl2) on the particle surface indicates that PbCl2 is mainly present in the solution in the form of [PbCl4] 2- complex in a saturated sodium chloride solution and the total concentration of the chloride ion component [ When Cl-] T = 0 · 918mol / L, PbCl2 crystallizes better in solid state crystals and PbCl2 crystal dissolves due to the complexation of chlorine when [Cl-] T> 0.918mol / L. The corrosion dissolution behavior of PbS solid surface was further analyzed by Tafel experiment. The results showed that when CFe3 + ≤6 × 10-4mol / L, the corrosion rate has a strong dependence on Fe3 +, the concentration increases and the corrosion rate increases rapidly. The CFe3 + > 6 × 10-4mol / L, a passivation phenomenon. NaCl added, the solution phase Cl- activity increased, PbCl2 rapid dissolution, corrosion reaction to speed up.