Early oxidation mechanism of austenitic stainless steel TP347H in supercritical water

被引：74
作者：
Li, Yanhui [1 ]
Wang, Shuzhong [1 ]
Sun, Panpan [1 ]
Xu, Donghai [1 ]
Ren, Mengmeng [1 ]
Guo, Yang [1 ,2 ]
Lin, Guike [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn MOE, Xian 710049, Shaanxi, Peoples R China
[2] Xi An Jiao Tong Univ, Suzhou Acad, Suzhou 215123, Jiangsu, Peoples R China
来源：
CORROSION SCIENCE | 2017年 / 128卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; AFM; SEM; Raman spectroscopy; XPS; Oxidation; FERRITIC-MARTENSITIC STEEL; CORROSION BEHAVIOR; HIGH-TEMPERATURE; STEAM OXIDATION; OXIDE FORMATION; ALLOY; 800H; DISSOLUTION; EXPOSURE; FILM; P92;
D O I：
10.1016/j.corsci.2017.09.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The initial corrosion behaviour of austenitic TP347H exposed to supercritical water was investigated. The early oxidation can be categorized into three stages (rapid oxidation, transitory, and diffusion-controlled stages). Higher temperature resulted in a transformation towards the subsequent stage earlier and less oxidation resistance. Cr6+ species (likely CrO2(OH)(2)) were only generated on the surface in the very early phase, and then they gradually disappeared as the exposure time increased. Compared with a complete outer Fe-rich oxide layer, the formation priority of a continuous inner Cr-rich layer was observed at 540 degrees C within 35 h. A corresponding early oxidation process was determined.
引用
收藏
页码：241 / 252
页数：12
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