腐蚀研究中电流阶跃法的频域分析  

Analysis of gavalnostatic pulse method in frequency domain used in corrosion studies

作　　者：阎培渝[1] 崔路[1] 

机构地区：[1]清华大学土木工程系

出　　处：《清华大学学报（自然科学版）》1999年第6期124-127,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"攀登计划B"项目

摘　　要：为了发展钢筋混凝土中钢筋锈蚀状态的快速测量方法，将基于时域分析的电流阶跃法所得结果与腐蚀电化学研究中测量腐蚀状态常用的、基于频域分析的交流阻抗谱法所得结果进行了比较，从理论上讨论了两者的关系，推导了基于Ｆｏｕｒｉｅｒ变换的转换公式。研究发现电流阶跃法在ｔ／（ＲＣ）＝０～５时间区段内测得的数据，通过计算可以得到交流阻抗谱法测量结果中的低频部分的信息，计算误差小于４％。因而，电流阶跃法在几ｍｉｎ内测得的信息量与交流阻抗谱法几ｈ测量的信息量相当。The results got by gavalnostatic pulse method (GPM) in time domain were compared with those got by electrochemical impedance spectroscopy (EIS) in frequency domain, which is used frequently to determine the corrosion status in electrochemical research, in order to develop a fast measuring method of corrosion status of rebar in reinforced concrete. Their relationship was discussed theoretically. A formula was deduced based on Fourier transformation to establish the conversion of the result of GPM from time domain into frequency domain. It is found that the information got by GPM in t/(RC) =0￣5 is nearly equivalent to the information got by EIS in low frequency region. The calculating error is smaller than 4%. This is why GPM method can get enough information in a much shorter time than EIS method does.

关 键 词：电流阶跃法 交流阻抗谱法 频域分析 电化学 腐蚀 

分 类 号：TG171[金属学及工艺—金属表面处理]