N80钢CO_2腐蚀产物膜在水/砂两相流介质中的磨损性能  

Wear Behavior of CO_2 Corrosion Scales on Well Tube Steel N80 in Water-Sand Two-Phase Fluid Medium

作　　者：林冠发[1] 郑茂盛[1] 白真权[1] 李党国[1] 赵新伟[1] 

机构地区：[1]西安交通大学材料科学与工程学院

出　　处：《摩擦学学报》2005年第1期78-82,共5页Tribology

基　　金：西安交通大学博士学位论文基金资助项目(020082055);国家重点基础研究发展规划项目(G1999065004);国家自然科学基金资助重点项目(50231020).

摘　　要：采用高温高压静态釜对N80油套钢在CO2中的腐蚀行为进行了模拟腐蚀试验;利用自制的磨损试验装置对比分析了腐蚀产物膜在水/砂两相介质中的磨损性能同成膜温度、CO2压力、流速及砂粒度之间的关系;用扫描电子显微镜分析了N80钢表面CO2腐蚀产物膜及其磨损表面形貌,用表面形貌仪测定了磨损试验前钢表面CO2腐蚀产物膜的粗糙度.结果表明:成膜温度和压力对钢表面腐蚀产物膜的表面粗糙度具有显著影响;N80钢表面CO2腐蚀产物膜磨损表面形貌沿深度方向存在差异,对应的抗磨性能亦有所不同;两相介质中的砂粒度越大或流体相对流速越大,则腐蚀膜的磨损越剧烈.An autoclave was used to simulate the corrosion behavior of N80 steel in CO2 atmosphere at elevated temperature and pressure. The wear behavior of the resulting CO2 corroded product scales on the N80 steel in a water-sand two-phase fluid medium was examined on a test rig designed in lab. The correlations among the wear behavior of the scales and the temperature and CO2 pressure at which the scales were formed, and the flowing velocity and sand granularity of the two-phase fluid medium, were investigated. Thus the surface roughness of the original scales was determined using a profilometer, while the worn surfaces and cross-sections of the scale were observed using a scanning electron microscope. Results indicated that the surface roughness of the original corrosion product scales was dependent on the temperature and CO2 pressure for the simulating corrosion tests, and the morphologies of the worn surfaces and cross-sections of the scales varied with varying wear depths, which corresponded to the differences in the microstructures, especially the grain granularity and compactness of the scales. Moreover, the erosion-wear behavior of the scales was also dependent on the flowing velocity and sand granularity of the two-phase fluid.

关 键 词：N80油套钢 CO2腐蚀 腐蚀产物膜 两相流 磨损性能 

分 类 号：TH117.3[机械工程—机械设计及理论]