MgCl₂溶液中における304ステンレス鋼の腐食電位のノイズ解析

抄録

Electrochemical noise generated from corrosion potential of Type 304 stainless steel in MgCl₂ solution has been studied by using a FFT analysis. White noise was observed in a frequency range below 0.1Hz and hence PSD at 0.05Hz was used as a measure for a noise power of the system. PSD at 0.05Hz was found to change as a function of the concentration of MgCl₂, temperature and immersion time. The slope of the log(PSD) vs. log(t) line was correlated with the kinetics of the film formation, by assuming that corrosion velocity is proportional to PSD.