The role of hydrogen on lead-induced localized corrosion of Alloy 690TT

被引：0
|
作者：
Li, Weipeng [1 ,2 ]
Mi, Zhishan [1 ]
He, Yang [1 ]
Han, Yaolei [2 ]
Shi, Fangjie [2 ]
Peng, Qunjia [2 ]
Qiao, Lijie [1 ]
机构：
[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China
[2] Suzhou Nucl Power Res Inst, Suzhou 215004, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 240卷
基金：
中国国家自然科学基金;
关键词：
Lead; Hydrogen; Nickel-based alloy; Passive film; Localized corrosion; DFT calculation; INDUCED PASSIVITY-DEGRADATION; GENERATOR TUBING ALLOY; PROBE FORCE MICROSCOPY; ELECTRON WORK FUNCTION; POTENTIAL-PH DIAGRAMS; HIGH-TEMPERATURE; CAUSTIC SOLUTION; IN-SITU; BEHAVIOR; CRACKING;
D O I：
10.1016/j.corsci.2024.112469
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The vital role of hydrogen on lead-induced localized corrosion of Alloy 690TT in the simulated secondary crevice chemistries of pressurized water reactor at 25 degrees C is investigated by using surface analysis techniques and calculations. Density functional theory (DFT) calculation reveals that there is a coupling effect between lead and hydrogen on inhibiting the kinetic diffusion of oxygen vacancies. Experimental results show that hydrogen causes the change of most easily-corroded location from the grain/carbide interface to the TiN/nucleus interface in the lead-induced corrosion process, which provides a new interpreting sight as for lead-induced stress corrosion cracking mode of nickel-based Alloys.
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收藏
页数：13
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