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

页码：770 / 780

页数：11

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