EFFECT OF SURFACE CONDITION ON THE OXIDATION BEHAVIOR OF HK40 ALLOY UNDER LOW OXYGEN PARTIAL PRESSURE

摘要：

　　The oxidation behavior of HK40 alloy(an oil cracking tube material)with different surface finishes(electrolytic polished,mechanical polished,grinded and sandblasted)was studied at 950℃,in H2-H2O atmosphere.The oxidation kinetics,morphology,chemical composition,phase composition of oxide scale were examined by Thermo-gravimetric Analysis(TGA),Scanning Electron Microscope(SEM),Energy Dispersive Spectrometer(EDS)and X-ray diffraction(XRD).Results demonstrated that,the oxide scale formed on the samples with different surface conditions were all composed of Cr2O3 and MnCr2O4.The oxidation kinetics of four samples followed cubic law and oxidation rate increased with the increasing of surface deformation.Oxide ridges formed on the electrolytic polished sample,with the increasing of the surface deformation,the ridges gradually disappeared.

关键词： Surface condition1 H2-H2O2 Oxidation3 Cubic law4

作者: Shao Mingzeng Wang Kuaishe

作者单位: Xian University of Architecture and Technology,No.13 Yanta Road,Xian,Shaanxi Province,710055,P.R.China

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 373-378

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）