Ⅳ. Electrochemical Measurements in Various Environments―Corrosion Monitoring of Carbon Steel in Deep Underground Environment―

Abstract

This article describes the current status of corrosion monitoring methods and examples of the measurement under deep underground environments for carbon steel overpacks for high-level radioactive waste disposal. Based on the studies on corrosion monitoring using AC Impedance technique, some of the typical measurement systems such as the electrodes arrangement are introduced. In-situ corrosion monitoring in engineering scale test is also being attempted using a deep underground research laboratory, and the measurement method and results are presented in this article.