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11212 An Electrochemical Study of Liquid Air Interface Corrosion in Dilute Hanford Nuclear Waste

Thursday, March 17, 2011: 8:25 AM
Room 351 E (George R. Brown Convention Center)
Hongbo Cong*1, Feng Gui1, C. Sean Brossia1, J. A. Beavers1, Gerald Frankel2, Glenn Edgemon3, Kayle D. Boomer4, and B. J. Wiersma5
(1)DNV Columbus; (2)Fontana Corrosion Center, The Ohio State University; (3)ARES Corporation; (4)Washington River Protection Solutions, LLC; (5)Savannah River National Laboratory
Corrosion at the liquid-air-interface (LAI) was observed in the dilute Hanford waste simulant at 50°C. Previous studies have addressed the factors that can affect the susceptibility of carbon steel to LAI corrosion. The present paper used a micro-electrochemical cell technique that enables the capture of the interface liquid for analysis to study the LAI corrosion phenomena. The results suggest that local chemistry change is responsible for the corrosion attack. However, nitrite depletion mechanism that was speculated previously did not appear to be a plausible mechanism for LAI corrosion.
See more of: Corrosion in Nuclear Systems - TEG 224X (Session II)
See more of: Technical Symposium
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