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采用腐蚀电化学方法研究了金在酸性流脲溶液中溶解的动力学。无二氧化硫时金溶解的活化能为４２．１５ｋＪ／ｍｏｌ；二氧化硫浓度为１．０×１０－５ｍｏｌ／Ｌ时活化能为２９．９５ｋＪ／ｍｏｌ，在０．５×１０－６～１．０×１０－５ｍｏｌ／Ｌ范围内，二氧化硫的反应级数为１。动力学研究的结果进一步揭示了二氧化硫在侵金过程中的催化作用，并再次证实了作者提出的二氧化硫在酸性硫脲浸金过程中的电化学还原—催化作用机理。
The kinetics of the dissolution of gold in acidic aqueous urea solution was studied by electrochemical corrosion method. The activation energy of gold dissolution without sulfur dioxide is 42.15kJ / mol, the activation energy is 29.95kJ / mol with sulfur dioxide concentration of 1.0 × 10-5mol / L, and the activation energy is 0.5 × 10-6 ~ 1.0 × In the range of 10-5 mol / L, the reaction order of sulfur dioxide is 1. Kinetic studies further reveal the catalytic role of sulfur dioxide in the process of invading gold, and again confirm the authors proposed electrochemical reduction - catalytic mechanism of sulfur dioxide in acid thiourea leaching process.