在用时频变换测量电极阻抗的技术中，介绍了用恒电量作为激励信号的时域法阻抗测量技术，分别用等效电路和实际腐蚀体系验证了恒电量测量的精确性，同时体现快速测量的特点.提出用拉普拉斯频谱分析恒电量瞬态响应的方法，不 仅能够简化恒电量激励条件下电路模型的解析，而且对于包含多个时间常数的腐蚀体系，有助于判断腐蚀反应的子过程和解析电极阻抗.
A unique method used coulostaticallyinduced transient for obtaining impedance of electrode was introduced.By applying Laplace transform techniques to the coulostatic response in the time domain,it was possible to obtain the electrode impedance for a corrosion cell.The validity of the proposed method was verified using equivalent circuits and real electrochemical systems respectively,and the results exhibited the feature of rapidity for coulostatic measurement,which is very useful to measure the impedance of electrode with acute change.Moreover,it is more convenient to derive the equation for the coulostatic response using network analysis in the Laplace domain than conventional method in the time domain,and this method can also contribute to interpret the corrosion process involved several time constants.
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