Waterside corrosion of M5 alloy in lithiated/borated and supercritical water: Influences of aqueous environments

被引：16

作者：

Jiang, Guanyu ^{[1
]}

Liu, Lu ^{[1
]}

Xu, Donghai ^{[1
]}

Li, Yanhui ^{[1
]}

Kuang, Wenjun ^{[2
]}

Wang, Mingjun ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn, Minist Educ, Xian 710049, Shaanxi Provinc, Peoples R China

[2] Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale CAMP Nano, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[3] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, State Key Lab Multiphase Flow Power Engn, Xian, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2023年 / 193卷

基金：

中国国家自然科学基金;

关键词：

M5; alloy; Corrosion; LiOH; Supercritical water; ZIRCONIUM ALLOYS; BEHAVIOR; OXIDATION; LIOH; ZIRCALOY-4; ZR-2.5NB; CRACKING; SURFACE; STEEL; XPS;

D O I：

10.1016/j.supflu.2022.105828

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：

The corrosion characteristics of M5 alloy in lithiated/borated water and pure supercritical water were investi-gated. Oxide films that formed on the alloy were primarily made up of m-ZrO2. Promoting inward diffusion of O2-into the matrix through defects, Li+ and OH- shared a synergistic effect on the occurrence and acceleration of waterside corrosion. B-(OH) and zirconium borate produced by the reaction between boric acid and OH- are conducive to alleviating LiOH ingress. In supercritical water, M5 alloy experienced weight loss. The microcrack density and porosity were significantly larger than those in the Li/B environment, and long transverse cracks parallel to the O/M (oxide/metal) interface existed. NiO, Ni2FeBO5 and NiMoO4 simultaneously deposited in lithiated/borated water, while large-sized spinel oxides were the main Ni-based deposits in supercritical water.

引用

页数：15

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