Effects of pH and Cr content of materials on flow-accelerated corrosion and their prediction

被引：3
作者：
Fujiwara, Kazutoshi [1 ]
Yoneda, Kimitoshi [1 ]
机构：
[1] Cent Res Inst Elect Power Ind, 2-6-1 Nagasaka, Yokosuka, Kanagawa 2400196, Japan
来源：
CORROSION SCIENCE | 2025年 / 244卷
关键词：
Flow-accelerated corrosion; Carbon steel; PH; Dissolved oxygen; Chromium content; BEHAVIOR; STEEL;
D O I：
10.1016/j.corsci.2024.112632
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The efficient management of flow-accelerated corrosion (FAC) occurring in power plant piping requires a deeper understanding of the mechanism underlying FAC. In this study, FAC tests were conducted on carbon steels with different Cr contents in flowing water at 418 K to evaluate the overlapping effects of various factors. In aqueous solutions with pHs 7-9.8, the FAC rate and the dissolved oxygen concentration required for FAC suppression decreased with increasing Cr content. Cr in the material accumulates in the outermost layer of the oxide film as FAC progresses, and the accumulation is found to be more enhanced in neutral solutions than in alkaline solutions. This finding is consistent with our FAC model.
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页数：12
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