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用电化学方法对腐蚀率和腐蚀敏度的测定仅限于用一种低导电率的介质。随着通过电化学腐蚀电池电流的增加其电位由于电介质溶液或表面层的电阻下降的范围内变化。所以,所有电化学试验法是按照电位曲线评价的。例如腐蚀率和针孔、应力腐蚀破坏的临界电位的测定等,都是在电阻下降的情况下讨论的。对于测定电流电位曲线较重要的技术可分几类型: 1)恒定法;2)分段作用和;3)a-c技术。用第一种测定是当电流不变时(恒位法)的
Electrochemical methods for the determination of corrosion rate and corrosion sensitivity are limited to a low conductivity medium. As the cell current is increased by electrochemical etching, its potential changes in the range of resistance decrease due to the dielectric solution or surface layer. Therefore, all electrochemical test method is based on the potential curve evaluation. For example, the corrosion rate and pinhole, the determination of the critical potential of stress corrosion damage, etc., are discussed in the case of a decrease in resistance. There are several types of techniques that are important for determining the current potential curve: 1) constant method; 2) fractional summation; and 3) a-c technique. With the first measurement is the same current (constant method)