Study on correction approach of complementary double reference potential difference in direct current potential drop method

摘要

The direct current potential drop(DCPD)method is used to Real-time monitor the crack growing state in environment assisted cracking(EAC)experiments of nuclear structural materials performed in the autoclave designed for simulating high temperature and high pressure water environment.However,the monitoring accuracy and stability should be continuously improved because of the tiny potential difference signal,the zero drift of instrument,specimen temperature resistivity variation and common mode electromagnetic interference etc.