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应用微电极法研究不锈钢点腐蚀发生发展过程,首次获得不锈钢夹杂物缺陷在阳极活化电位的活性溶解信息和点腐蚀发展过程蚀点生长和消止两个相互竞争、不断发展的动态行为,深化对夹杂物缺陷诱导点腐蚀的发生及点腐蚀发展过程机理的认识。实验表明,应用微电极技术研究点腐蚀过程可具有若干明显特点:a.由于界面双层电容和背景电流的大幅度降低,有利于检测点腐蚀发生和发展过程快速、信号微弱;b.可考察夹杂物缺陷的电化学活性及其诱导点腐蚀成核的重要作用;c.可研究单孔点腐蚀发展的动态行为及影响因素。
The micro-electrode method was used to study the occurrence and development of pitting corrosion in stainless steel. For the first time, the active dissolution information of stainless steel inclusion defects in the activation potential of the anode and the growth and abatement of pitting corrosion were obtained. Two competing and evolving dynamic behavior, The Occurrence of Pitting Corrosion Induced by Inclusion Defect and Cognition of the Mechanism of Pitting Corrosion. Experiments show that the use of microelectrode technology to study the point corrosion process can have a number of distinct features: a. As the interface double-layer capacitance and background current greatly reduced, is conducive to detecting the occurrence and development of pitting corrosion rapid, weak signal; b. Electrochemical activity of inclusions can be investigated and its role in inducing pitting corrosion nucleation; c. We can study the dynamic behavior of single hole pitting corrosion and its influencing factors.