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本文根据电极过程动力学的基本理论和金属阳极恒电位溶解的实验结果,提出了有效电流的概念,导出了金属阳极恒电位溶解的动力学模型。此模型也适用于受固相扩散传质控制的合金或类合金(如某些金属硫化物)阳极的恒电位溶解过程。在液相扩散传质控制条件下,金属阳极恒电位溶解的动力学模型为:i(t)=i_x+[i(0)-i_x]e~(-pt)Q(t)=i_xt+[(i(0)-i_x)/p](1-e~(-pt))利用此模型对锡阳极在氟硅酸-硫酸溶液中恒电位溶解的实验结果进行了模拟计算,计算结果与实验数据十分吻合。
In this paper, based on the basic theory of electrode process kinetics and the experimental results of metal anode potentiostatic dissolution, the concept of effective current is proposed and the kinetic model of metal anode potentiostatic dissolution is derived. This model is also suitable for the potentiostatic dissolution of anodes of alloys or alloys (such as some metal sulfides) controlled by solid-phase diffusion mass transfer. Under the condition of liquid diffusion and mass transfer, the kinetic model of constant potential dissolution of metal anode is as follows: i (t) = i_x + [i (0) -i_x] e ~ -pt Q (t) = i_xt + [(i (0) -i_x) / p] (1-e ~ (-pt)) The model was used to simulate the experimental results of tin anode dissolved in fluorosilicic acid-sulfuric acid solution at constant voltage. The calculated results are in good agreement with the experimental data Anastomosis.