Effect of dissolved hydrogen on the electrochemical behaviour of Alloy 600 in simulated PWR primary water at 290°C

被引：60
作者：
Qiu, Yubing [1 ,2 ]
Shoji, Tetsuo [1 ]
Lu, Zhanpeng [1 ]
机构：
[1] Tohoku Univ, Fracture & Reliabil Res Inst, Sendai, Miyagi 9808579, Japan
[2] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Hubei, Peoples R China
来源：
CORROSION SCIENCE | 2011年 / 53卷 / 05期
关键词：
Alloy; EIS; Polarization; High temperature corrosion; Passivity; HIGH-TEMPERATURE WATER; NICKEL-BASED ALLOYS; REVISED POURBAIX-DIAGRAMS; 316L STAINLESS-STEEL; HIGH-PRESSURE WATER; OXIDE-FILMS; AQUEOUS ENVIRONMENTS; CORROSION BEHAVIOR; PASSIVE FILMS; BASE ALLOYS;
D O I：
10.1016/j.corsci.2011.02.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
With an increase in dissolved hydrogen (DH) content from 0 to 5 cm(3) STP H(2)/kg H(2)O the electrochemical behaviour of Alloy 600 in deaerated PWR primary water at 290 degrees C was investigated, using corrosion potential (E(corr)) monitoring, potentiodynamic polarization, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). DH content controls the E(corr), of Alloy 600. Raising DH content directly promotes the cathodic process and reduces the passivity of Alloy 600 significantly. EIS results show that increasing DH content results in a thinner inner-layer oxide film and ions diffusion becomes easier. The mechanism of these DH effects is discussed. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1983 / 1989
页数：7
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