Abstract

Dew point corrosion (DPC) is an electrochemical process in a dynamic electrolyte layer, which makes it difficult to carry out conventional electrochemical measurements and thus is not conducive to corrosion mechanism study. In situ electrochemical measurements including electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN) are realized by a novel DPC simulation set-up and special electrode arrangements in this work. DPC of carbon steel is studied by in situ test method and ex situ test method, respectively. Different corrosion mechanisms are obtained from two methods. Thus, it is significant to study DPC by in situ test method so as to understand DPC essentially.

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