由弱极化曲线拟合估算腐蚀过程的电化学动力学参数

在腐蚀过程的阴极反应是由电化学反应过程和传质过程混合控制的情况下,腐蚀金属电极的弱极化曲线方程式包含4个电化学动力学参数。迄今还没有一个方法可以同时测定这些动力学参数。本文证明,利用高斯—牛顿曲线拟合法直接对腐蚀金属电极的弱极化曲线拟合,可以解决这一问题。编制了一个BASIC语言的计算程序,并讨论了编制程序时应加以考虑的问题。

ESTIMATION OF ELFCTROCHEMICAL KINETIC PARAMETERS OF CORROSION PROCESSES BY WEAK POLARIZATION CURVE FITTING

It is difficult to estimate all the electrochemical kinetic parameters of corrosion process if the cathodic process is under mixed activation and mass transport control. The best way to deal with this problem is to estimate the values of kinetic parameters by fitting the weak polarization curves measured on corroding metals. It is shown that the Guauss-Newton curve-fitting method can be applied for this purpose. A computing program in BASIC language is worked out and the problems encountered in compiling the program are discussed.