Journal
CORROSION
Volume 63, Issue 8, Pages 770-780Publisher
NATL ASSOC CORROSION ENG
DOI: 10.5006/1.3278426
Keywords
carbon steel; electric resistance; electrochemical corrosion potential; flow-accelerated corrosion; pure water
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Flow-assisted corrosion (FAC) often has caused serious damage to carbon steel piping in nuclear power plants. As a first stage of experiments to determine the effects of water chemistry parameters on FAC, corrosion rates of carbon steel were measured in 140 degrees C pure water with an online corrosion rate monitor based on electrical resistance measurement as [O-2] and flow velocity were changed. The data were compiled as a function of electrochemical corrosion potential (ECP) and flow velocity. It was concluded that the FAC rate was below the detectable limit in highly oxygenated conditions, where [0,1 was >50 ppb and ECP was above -0.2 V-SHE; and the effects of preoxidation treatment disappeared rapidly under deaerated conditions.
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