Stress Corrosion Cracking Behavior of Alloy 600 Coupled to Magnetite under High-Temperature Caustic Conditions

被引：2

作者：

Song, Geun Dong ^{[1
]}

Han, Jeoh ^{[1
]}

Jeon, Soon-Hyeok ^{[1
]}

Hur, Do Haeng ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, 989-111 Deadeok Daero, Daejeon 34057, South Korea

来源：

MATERIALS | 2019年 / 12卷 / 13期

基金：

新加坡国家研究基金会;

关键词：

Nickel alloys; steam generator; stress corrosion cracking; magnetite; galvanic couple; PRESSURIZED-WATER REACTORS; QUANTITATIVE ASSESSMENT; SECONDARY-SIDE; INTERGRANULAR ATTACK; SUBMODES; POTENTIALS; SULFATE;

D O I：

10.3390/ma12132091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study aims to investigate and explain the magnetite-accelerated stress corrosion cracking phenomenon of Alloy 600 under caustic conditions, based on the electrochemical behavior. After the SCC test that lasted for 300 h, no cracks were observed in any of the magnetite-free specimens, whereas cracks with a depth of 150 to 280 mu m were generated in all the magnetite-deposited specimens. Furthermore, the electrochemical behavior of magnetite and Alloy 600 demonstrated that Alloy 600 behaved as an anode in the coupling system with magnetite. In this coupling system, the electrochemical potential of Alloy 600 can be shifted into the range potentially susceptible to stress corrosion cracking.

引用

页数：7

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