Galvanic Corrosion between Alloy 690 and Magnetite in Alkaline Aqueous Solutions

被引：10
|
作者：
Jeon, Soon-Hyeok [1 ]
Song, Geun-Dong [1 ]
Hur, Do Haeng [1 ]
机构：
[1] Korea Atom Energy Res Inst, Nucl Mat Safety Res Div, Taejon 305353, South Korea
来源：
METALS | 2015年 / 5卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
ELECTROCHEMICAL DEPOSITION; DISSOLVED-OXYGEN; CARBON-STEEL; OXIDE-FILMS; BEHAVIOR; TEMPERATURE; DISSOLUTION; NUCLEATION; SURFACE; METAL;
D O I：
10.3390/met5042372
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The galvanic corrosion behavior of Alloy 690 coupled with magnetite has been investigated in an alkaline solution at 30 °C and 60 °C using a potentiodynamic polarization method and a zero resistance ammeter. The positive current values were recorded in the galvanic couple and the corrosion potential of Alloy 690 was relatively lower. These results indicate that Alloy 690 behaves as the anode of the pair. The galvanic coupling between Alloy 690 and magnetite increased the corrosion rate of Alloy 690. The temperature increase led to an increase in the extent of galvanic effect and a decrease in the stability of passive film. Galvanic effect between Alloy 690 and magnetite is proposed as an additional factor accelerating the corrosion rate of Alloy 690 steam generator tubing in secondary water. © 2015 by the authors; licensee MDPI, Basel, Switzerland.
引用
收藏
页码：2372 / 2382
页数：11
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