几种合金在450 ℃/23 MPa超临界水氧化环境中腐蚀行为研究
Corrosion Behavior of Several Alloys in Supercritical Water Oxidation Environment at 450 ℃/23 MPa
王琳琳 1侯坤磊 2查向东 2欧美琼 2马颖澈2
作者信息
- 1. 东北大学材料科学与工程学院,辽宁沈阳 110819
- 2. 中国科学院金属研究所,辽宁沈阳 110016
- 折叠
摘要
采用X射线衍射仪、扫描电子显微镜等分析手段,对比研究了 4种典型镍基耐蚀合金在450 ℃/23 MPa下Na3PO4、Na2SO4、NaCl超临界水溶液中的腐蚀行为.结果表明,50 h后,合金表层均匀分布着短棒状、针状的腐蚀产物,主要组成为NiCr2O41 Cr2O3,NiO,Ni3(PO4)2,CrPO4和Na3PO4等.500 h后,腐蚀层的厚度明显增大,依据腐蚀层厚度的增大速度,4种合金的耐蚀性顺序为:X-1#＞X-2#＞625＞C-276.
Abstract
The corrosion behavior of four typical Ni-based corrosion-resistant alloys in supercritical aqueous solution containing Na3PO4,Na2SO4,and NaCl at 450 ℃/23 MPa was studied by XRD,SEM,etc.The results show that after corrosion for 50 h,the surface of the alloys is covered by short rod-shaped and needle-shaped products mainly consisting of NiCr2O4,Cr203,NiO,Ni3(PO4)2,CrPO4,and Na3PO4.With prolonging the time,the thickness of the corrosion layers is increased and the corrosion resistance is ranked as X-1#＞X-2#＞625＞C-276.
关键词
镍基合金/超临界水氧化/腐蚀行为Key words
nickel-based alloy/supercritical water oxidation/corrosion behavior引用本文复制引用
出版年
2024
NETL
NSTL
万方数据