TY - GEN
T1 - Electrochemical corrosion measurements in high temperature boiler water
AU - Balashov, Victor N.
AU - Fedkin, Mark Valentinovich
AU - Lvov, Serguei
AU - Mathews, James A.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - The electrochemical corrosion measurements at temperatures above 300 °C present a specific challenge due to limitations on material stability in sub- and super-critical hydrothermal environments, the very low concentrations of ionic species in the typical boiler water and the sluggish corrosion process. The actual carbon steel corrosion rates, after formation of protective oxide layer, are as low as few microns per year. The traditional mass loss corrosion studies would require a substantial experimental time to measure such a low rate process. We developed an approach using a number of electrochemical techniques that are able to provide in-situ information on the instantaneous corrosion rates at any stage of the process. In this paper, the experimental corrosion data obtained by electrochemical impedance spectroscopy, DC polarization, and cyclic voltammetry at temperatures up to 350 °C are reported to illustrate the corrosion behavior of the carbon steel in de-oxygenated all-volatile treatment (AVT) boiler solutions with different chloride contents (up to 3000 ppb).
AB - The electrochemical corrosion measurements at temperatures above 300 °C present a specific challenge due to limitations on material stability in sub- and super-critical hydrothermal environments, the very low concentrations of ionic species in the typical boiler water and the sluggish corrosion process. The actual carbon steel corrosion rates, after formation of protective oxide layer, are as low as few microns per year. The traditional mass loss corrosion studies would require a substantial experimental time to measure such a low rate process. We developed an approach using a number of electrochemical techniques that are able to provide in-situ information on the instantaneous corrosion rates at any stage of the process. In this paper, the experimental corrosion data obtained by electrochemical impedance spectroscopy, DC polarization, and cyclic voltammetry at temperatures up to 350 °C are reported to illustrate the corrosion behavior of the carbon steel in de-oxygenated all-volatile treatment (AVT) boiler solutions with different chloride contents (up to 3000 ppb).
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M3 - Conference contribution
AN - SCOPUS:84864999168
SN - 9781615674251
T3 - 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
SP - 3158
EP - 3166
BT - 17th International Corrosion Congress 2008
T2 - 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
Y2 - 6 October 2008 through 10 October 2008
ER -