In order to study the effect of surface roughness and residual stress on corrosion resistance of the steel used in a hydrogen production reactor, the static corrosion experiments of the steel used in the hydrogen production reactor is carried out based on the acid medium corrosion condition produced by the hydrogen pro-duction reactor. The effects of different surface roughness and residual stress on the corrosion rate, surface roughness and tensile property degradation of the steel used in a hydrogen production reactor were analyzed. The influence of surface integrity on corrosion resistance was analyzed from the point of view of intergranular stress. By experiment results, it is found that, with the increase of corrosion time, the corrosion rate of the sample with larger roughness is decreased, and the surface roughness is of Ra0.05 μm. After corrosion, the surface roughness of the workpiece is increased with larger roughness, while the surface roughness of the speci-mens is decreased with smaller roughness. The mechanical properties of the materials are increased first and then decreased with the surface roughness. With the increase of residual stress on the surface of the specimen, the corrosion rate is decreased first and then increased. After corrosion, the surface roughness is increased with the increase of initial residual stress. When the initial surface residual stress is -293 MPa, the mechani-cal properties of the workpiece after corrosion are relatively good.
关键词
制氢反应器/表面完整性/残余应力/腐蚀速率/力学性能
Key words
hydrogen production reactor/surface integrity/residual stress/corrosion rate/mechanical property
维普
万方数据