Characterizing corrosion behavior under atmospheric conditions using electrochemical techniques
By Wall, F.D.; Martinez, M.A.; Missert, N.A.; Copeland, R.G. & Kilgo, A.C.
Published in Corrosion Science
NULL
2005
Abstract
AC and DC electrochemical experiments were performed as a function of humidity and contaminant concentration in an effort to identify the range of atmospheric environments where corrosion processes could be detected and possibly quantified. AC measurements exhibited two time constants at 25% relative humidity (RH), possibly indicating the ability to resolve both electrolyte resistance and interfacial impedance. Galvanic current measurements were sensitive to the presence of Cl2(g) at 30% RH and electrochemical transients were detected at both 30% and 50% RH levels, also indicating sensitivity to interfacial processes. Higher humidity levels allowed better quantification due to decreasing electrolyte and interfacial impedances.
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