摘要
研究了铁素体-马氏体钢P92在400-600℃、25MPa超临界水中的腐蚀行为。用X射线衍射（XRD）和扫描电镜-电子能谱（SEM-EDX）分析了氧化膜微观组织,对P92在超临界水中的腐蚀动力学规律进行了分析。结果表明：温度对腐蚀速率有显著影响,600和500℃的腐蚀增重分别为400℃的5.32倍和1.59倍;400和500℃超临界水中腐蚀动力学遵循立方规律,600℃时近似遵循抛物线规律;氧化膜为双层结构,外层氧化膜为柱状Fe3O4相,内层氧化膜为Fe3O4和FeCr2O4相。
The corrosion behavior of ferritic-martensitic（F-M）steel P92 exposed to static supercritical water（SCW）at 400-600℃and 25 MPa for 500 hwas investigated.The microstructures of oxide scale were analyzed by means of SEM,EDX and XRD,and the corrosion rules for P92 in SCW were also analyzed.The results show that the temperature has a significant influence on the corrosion rate,and corrosion mass gain at 600 and 500℃is 5.32 and 1.59 times of that at 400℃;the oxidation kinetics curves of P92 follow parabolic law in 400-500℃,and follow near-cubic rate law in 600℃;a dual-layered oxide scale is composed of an iron-rich columnar magnetite（Fe3O4）in outer oxide layer and a chromium-rich magnetite/spinel-mixed（Fe3O4/FeCr2O4）in inner layer.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2016年第8期57-63,共7页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(11275140)
江苏科技大学博士基金资助项目(1062921404)
关键词
超临界水
高温高压
铁素体-马氏体钢
腐蚀产物膜
supercritical water
high temperature high pressure
ferrite-martensite steel
corrosion product film
