摘要
通过扫描电镜(SEM)、能谱仪(EDS)和电子背散射衍射(EBSD),研究了表面粗糙度对800H合金在650℃、25 MPa的超临界水环境中均匀腐蚀行为的影响。结果表明:粗磨试样的腐蚀质量增加速率显著低于机械抛光试样的;浸泡1000 h后,机械抛光试样的腐蚀质量增加是粗磨试样的20倍。振动抛光试样表面生成外层富铁、内层富铬的双层氧化膜,粗磨试样表面生成单层富铬氧化膜,且在氧化膜下方出现明显的富铬滑移带。
The effect of surface roughness on general corrosion behavior of 800 H alloy in supercritical water environment at 650 ℃ and 25 MPa was studied by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and electron backscattering diffraction(EBSD). The results showed that the corrosion mass increase rate of rough grinding sample was significantly lower than that of mechanical polishing sample. After immersion for 1 000 h, the corrosion mass of mechanical polishing sample increased 20 times as much as that of rough grounding sample. A double-layer oxide film rich in iron and chromium was formed on the surface of vibration polishing sample, and a single-layer oxide film rich in chromium was formed on the surface of rough grounding sample, and obvious chromium-rich slip band appeared under the oxide film.
作者
王鹏
刘珠
苏豪展
郭相龙
陈凯
马武江
张乐福
WANG Peng;LIU Zhu;SU Haozhan;GUO Xianglong;CHEN Kai;MA Wujiang;ZHANG Lefu(Science and Technology on Reactor System Design Technology,Laboratory,Nuclear Power Instituteof China,Chendu 610213,China;School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Xinmin(Dongtai)Heavy Forging Co.,Ltd.,Dongtai 224200,China)
出处
《腐蚀与防护》
CAS
北大核心
2021年第12期1-7,共7页
Corrosion & Protection
基金
国家重点研发计划(2018YFE0116200)。
