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一、前言关于孔蚀的发生机理,迄今已提出了多种模型。随着交流阻抗测试技术的发展,目前已有不少作者将阻抗技术应用于孔蚀及其它局部腐蚀的研究,取得了一些有益的结果。阻抗技术在界面反应及有关界面现象的研究中有很大的优越性;同时它又具有时间平均和面积平均的特性,因而,在应用于局部腐蚀研究时,阻抗分析必须考虑时间因素和面积因素的影响。曹楚南等研究了钝态电极处于孔蚀诱导期和发展期的阻抗频谱特征,发现钝化膜穿孔前,在sluyters图上高频区出现一个容抗圈的同时,还有低频感抗或电感性实部收缩现象;
First, the preamble On the mechanism of pitting occurs, so far have put forward a variety of models. With the development of AC impedance testing technology, many authors have applied impedance technology to the study of pitting corrosion and other localized corrosion. Some useful results have been obtained. Impedance technique has great advantages in the research of interface reaction and related interface phenomena. Meanwhile, it has the characteristics of time average and area average. Therefore, impedance analysis must consider the time factor and area factor when applied to localized corrosion research Impact. Cao Chu Nan et al. Studied the impedance spectral characteristics of the passive electrode at the pitting induction and development stages. It was found that before the perforation of the passivation film, there was a capacitive reactance ring in the high frequency region of the sluyters diagram. At the same time, Real contraction;