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本文导出了在扩散控制和薄层浸蚀条件下阶跃电流过渡时间法的定量相分析的公式。在40％NaOH+0.5％酒石酸溶液中浸蚀模具钢中的M_(23)C_6相的实验规律,如过渡时间与电流的关系、与酒石酸浓度的关系、与温度的关系等,特别是由后者计算出的电极过程的激活能的大小,证实该条件下电报过程确由参与反应离子的扩散控制着,该公式比已有的公式与实验的结果吻合得更好,应用该公式测定的模具钢中的M_(23)C_6相的含量与萃取法所得结果是一致的。
In this paper, the formulas of quantitative phase analysis of step current transition time method under diffusion control and thin-layer etching are derived. In 40% NaOH + 0.5% tartaric acid solution etching die steel M_ (23) C_6 phase experimental rules, such as the relationship between the transition time and current, the relationship with the concentration of tartaric acid, and the relationship between the temperature, especially after Calculated by the electrode activation energy of the process to confirm that the conditions of the telegraph process indeed involved in the proliferation of reactive ions controlled by the formula than the existing formula and experimental results agree better with the formula to determine the mold The content of M_ (23) C_6 phase in steel is consistent with that obtained by the extraction method.