Electrochemical noise transient analysis for 316 and Duplex 2205 stainless steels in NaCl and FeCl
DOI:
https://doi.org/10.3989/revmetalm.1166Keywords:
Pitting corrosion, Electrochemical noise, Electrochemical Techniques, Stainless steel austenitic 316, SS Duplex 2205Abstract
This work shows the results obtained from electrochemical noise measurements for different materials exhibiting pitting corrosion. The transients presented in the potential and current time, correlates with the scanning electron microscopy (SEM) surface analysis. Electrochemical measurements were made at different exposure times to obtain the correlation. The materials used were stainless steel austenitic 316 and duplex 2205, immersed in ferric chloride (FeCl3) and sodium chloride (NaCl) electrolytes. SEM analysis shows that the transients observed in the time series, really correspond to the activity of pit nucleation developed over the surface of the electrodes.
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