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苏联学者Брайнина在1974年提出了应用动电位极化曲线进行碳膏电极物相分析的原理。她从电极反应模型M→M~(n+)+ne出发,运用动力学方法导出了动电位极化曲线的峰电流i_p与电极中活性相的浓度C_1~0的正比关系式,即对于一个不可逆的电极反应其中v为扫描速度,d为活性相的粒度。式(1)表明,只有当d为常数时,才能建立i_p与C_1~0的正比关系。而钢铁样品中的析出相的粒度通常是变化的,所以它不适宜用作钢中析出相的浸
Soviet scholar Брайнина in 1974 proposed the application of potentiodynamic polarization curve of carbon paste electrode phase analysis principle. Starting from the electrode reaction model M → (n +) + ne, she derived the positive relationship between the peak current i_p of the potentiodynamic polarization curve and the concentration C_1 ~ 0 of the active phase in the electrode by using the kinetic method. That is, for an irreversible Where v is the scanning speed and d is the particle size of the active phase. Equation (1) shows that the direct relationship between i_p and C_1 ~ 0 can be established only when d is constant. The grain size of the precipitated phase in steel samples is usually variable, so it is not suitable for use as a leaching phase in steel