Analysis of Different Methods to Calculate Electrochemical Noise Resistance Using a Three-Electrode Cell
CORROSION(2012)
摘要
In a theoretical approach, the noise resistance parameter (R,) (in time domain) was deduced from an electric equivalent model proposed by Bertocci and coworkers for a cell with three identical electrodes. The voltage and current were measured. The R-n and resistance of spectral noise (R-sn and R-snO [defined elsewhere]) were estimated for mild steel (MS) and stainless steel (SS) Type 304L (UNS S30403) electrodes immersed in four different solutions. The obtained results were converted into corrosion rate and finally compared with data measured with linear polarization resistance (LPR) and mass loss techniques. Electrochemical noise (EN) techniques had better agreement with other techniques in high corrosion rates. Furthermore, dispersed results were measured in low-activity systems.
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关键词
electrochemical noise,linear polarization resistance,mild steel,noise resistance,spectral noise resistance,stainless steel
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