一、前言用电化学方法研究金属的腐蚀行为,已经日趋普遍。但是对于试样的非工作表面(包括试样边缘、导线、试样与导线的接头表面等)与介质隔离所采取的一般方法中(我们称为封样技术),常由于缝隙腐蚀的干扰,使电化学方法在应用时,尤其是在测定耐蚀合金的临界点腐蚀电位、重钝化电位(或称保护电位)及缝隙腐蚀研究时遇到困难。 I. Introduction Electrochemical methods to study the corrosion behavior of metals have become more and more common. However, for the common method of isolating the non-working surface of the sample (including the edge of the sample, the wire, the joint surface of the sample and the wire, etc.) from the medium (we call it sealing technique), often due to the interference of crevice corrosion, Electrochemical methods in the application, especially in the determination of the corrosion resistance of the critical point corrosion potential, heavy passivation potential (or potential) and crevice corrosion research difficulties.