100 mV阴极极化准则是国内外阴极保护标准中的一个重要判据, 它在运行年限久、防腐蚀层较差的金属结构物上的应用越来越广泛, 然而在标准和文献中缺乏该阴极保护准则的依据介绍以及有效性的论证, 业界对该准则的有效性也存在疑虑与争论。为此, 本工作介绍了100 mV阴极极化准则的起源, 通过理论依据结合现场验证数据阐述了该准则的有效性, 对比了其在实际应用中的优缺点, 明确了其适用条件。

The 100 mV cathodic polarization criterion is an important criterion in cathodic protection standards. It has been used more and more in metal structures which have serviced for a long time and with poor anticorrosive coating. However, in standards and literature, there is a lack of introduction and validity demonstration of this cathodic protection criterion. There are doubts and debates in the industry about the effectiveness of this criterion. So, in this paper, the origin of the 100 mV cathode polarization criterion is introduced. The validity of the criterion is expounded through theoretical basis and field verification data. The advantages and disadvantages in practical application of this criterion are compared, and the applicable conditions are clarified.