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℃/23MPa下Na_(3)PO_(4)、Na_(2)SO_(4)、NaCl超临界水溶液中的腐蚀行为。结果表明,50h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NiCr_(2)O_(4),Cr_(2)O_(3),NiO,Ni_(3)(PO_(4))2,CrPO_(4)和Na_(3)PO_(4)等。500h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。
The corrosion behavior of four typical Ni-based corrosion-resistant alloys in supercritical aqueous solution containing Na_(3)PO_(4),Na_(2)SO_(4),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 NiCr_(2)O_(4),Cr_(2)O_(3),NiO,Ni_(3)(PO_(4))2,CrPO_(4),and Na_(3)PO_(4).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.
作者
王琳琳
侯坤磊
查向东
欧美琼
马颖澈
Wang Linlin;Hou Kunlei;Zha Xiangdong;Ou Meiqiong;Ma Yingche(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第1期204-214,共11页
Rare Metal Materials and Engineering
关键词
镍基合金
超临界水氧化
腐蚀行为
nickel-based alloy
supercritical water oxidation
corrosion behavior
