Flow-assisted corrosion of carbon steel under neutral water conditions

被引：26
|
作者：
Satoh, T.
Shao, Y.
Cook, W. G.
Lister, D. H.
Uchida, S.
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Quantum Sci & Energy Engn, Sendai, Miyagi 980, Japan
[2] Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada
来源：
CORROSION | 2007年 / 63卷 / 08期
关键词：
carbon steel; electric resistance; electrochemical corrosion potential; flow-accelerated corrosion; pure water;
D O I：
10.5006/1.3278426
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：770 / 780
页数：11
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