3篇
您的检索式：作者名="PENG Wenshan"
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| 1 | Corrosion Mechanism of 5083 Aluminum Alloy in Seawater Containing Phosphate显示文摘As a material with good corrosion resistance,5083 aluminum alloy has a great application prospect in marine environment.In this work,the corrosion characteristics of 5083 aluminum alloy in seawater containing phosphate were investigated with Potentiodynamic Polarization,Electrochemical Impedance Spectroscopy (EIS),Scanning Electron Microscope (SEM),Energy Dispersive Spectroscopy Analysis (EDSA),X-ray Photoelectron Spectroscopy (XPS) and Laser Confocal Microscope.The results indicated that the effects of phosphate in seawater were two-fold.Firstly,phosphate slightly accelerated the corrosion of 5083 in seawater in the early stage of corrosion.HPO_4~(2-)competed with OH~-in the adsorption process on the alloy surface,which weakened the contact between OH~-and Al~(3+)near the interface of the alloy,and inhibited the formation as well as the self-repair of the passive film,thus accelerating the activation dissolution process.Compared with the natural seawater,the charge transfer resistance of 5083 in the seawater containing phosphate decreased faster during the early stage of corrosion,and the corrosion current density i_(corr) was higher in seawater containing phosphate.On the other hand,the addition of phosphate would not affect the cluster distribution of the second phase of 5083 in seawater,but it changed the composition of the corrosion product layer and had an obvious inhibitory effect on the local corrosion of 5083 in seawater.After 16-day exposure,shallower and more sparsely distributed pits could be observed on the derusted surface of 5083 in the seawater containing phosphate,and the pitting coefficient in the seawater containing phosphate was significantly lower than that in natural seawater.The reduction of pitting tendency could be realized mainly through two ways.First,the HPO_4~(2-)adsorbed on the surface of the passive film in the early stage of corrosion and repeled the corrosive anions such as Cl~-.Second,phosphate participated in the construction of the Ca HPO_4 precipitation film,which acted as a barrier and protection. | WANG Jiaming YANG Haodong DU Min HOU Jian PENG Wenshan LIN Cunguo | 2021 | Journal of Ocean University of China2021，20，2： | 3 |
| 2 | Experimental and CFD investigation of flow behavior and sand erosion pattern in a horizontal pipe bend under annular flow显示文摘The internal erosion of pipelines in oil and gas storage and transportation engineering is highly risky.High gas velocity of annular flow entrained sand will cause damage to the pipelines,and may further result in thinning of the wall.If this damage lasts for a long time,it may cause pipeline leakage and cause huge economic losses and environmental problems.In this research,an experimental device for studying multiphase flow erosion is designed,including an erosion loop and an experimental elbow that can test the erosion rate.The annular flow state and pipe wall erosion morphology can also be tested by the device.The computational fluid dynamics(CFD)method is combined with the experiment to further study the annular flow erosion mechanism in the pipeline.The relationship between gas-liquid-solid distribution and erosion profile was studied.The results show that the most eroded region occurs be-tween 22.5° and 45° in the axial angle direction and between 90° and 135° in the circumferential angle direction of the elbow.The pits and deep scratches form on the surface of the sample after the sand collision. | Wenshan Peng Li Ma Ping Wang Xuewen Cao Kun Xu Yichun Miao | 2023 | Particuology2023，，4： | 1 |
| 3 | Numerical study of elbow erosion due to sand particles under annular flow considering liquid entrainment显示文摘Sand particle erosion is always a challenge in natural gas production.In particular,the erosion in gas-liquid-solid annular flow is more complicated.In this study,a three-phase flow numerical model that couples the volume of fluid multiphase flow model and the discrete phase model was developed for prediction of erosion in annular flow.The ability of the numerical model to simulate the gas-liquid annular flow is validated through comparison with the experimental data.On the basis of the above numerical model,the phase distribution in the pipe was analyzed.The liquid entrainment behavior was reasonably simulated through the numerical model,which guaranteed the accuracy of predicting the particle erosion.Additionally,four erosion prediction models were used for the erosion calculation,among them,the Zhang et al.erosion model predicted the realistic results.Through the analysis of the particle trajectory and the particle impact behavior on the elbow,the cushion effect of the liquid film on the particles and the erosion morphology generation at the elbow were revealed. | Xiangyang Zhao Xuewen Cao Hengguang Cao Jun Zhang Jianing Zhang Wenshan Peng Jiang Bian | 2023 | Particuology2023，，5： | 0 |
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