Effect of ODACON® F on Carbon Steel Corrosion in Water-Steam Cycle Chemistry with Ethanolamine

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ABSTRACT

Film-forming amine (FFA) applications are a recent strategy used by nuclear power plants for the corrosion protection of secondary-side components during outages and normal operation. Laboratory investigations of FFA applications are usually conducted in static autoclaves under conditions that are different from the field, where the conditions are dynamic with factors such as temperature and single-/two-phase flow varying throughout the water-steam cycle. To address this gap, the H3 Loop, a recirculating loop at Canadian Nuclear Laboratories was used to investigate the effect of ODACON® F, a commercial FFA, on the corrosion of pre-oxidized (PO) carbon steel (CS) tubing exposed to ethanolamine chemistry under two-phase flow conditions at 180 °C and 15 % steam quality. Post-test weight measurements showed negligible corrosion due to the pre-existing oxides. Water beading tests and scanning electron microscopy examination demonstrated that the PO CS surfaces exposed to ODACON® F under different temperatures and single-/two-phase flow conditions were hydrophobic due to film formation and not the pre-existing oxides.

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Ulaganathan, J., Ramminer, U., Fandrich, J., "Effect of ODACON® F on Carbon Steel Corrosion in Water-Steam Cycle Chemistry with Ethanolamine", PPCHEM 2024, 26(4), 204.
DOI 10.69158/ppchem.2024.04.204

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