Corrosion Monitoring in Chemical Cleaning of Steam Generator

摘要

Corrosion monitoring may be required during chemical cleaning of nuclear steam generators. Continuous corrosion measurement can be obtained with electrochemical techniques, in particular linear polarization technique by using commercially available instrument. To determine the reliability of linear polarization in chemical cleaning solutions, Linear polarization and weight loss of A_3 carbon steel and S_(271) steel were studied in solution C and solution D. The real Tafel slopes of A_3 carbon steel and S_(271) steel were measured Tafel slopes that instrument had set up were approximate to the real Tafel slopes. We had carried out engineering experiment. With few exceptions, most data between linear polarization and weight loss are similar. Results of the work indicate that liner polarization can be used in monitoring corrosion rate during chemical cleanings of nuclear steam generator.