膨胀机动叶轮气蚀诱发机制及演变过程
Induction Mechanism and Evolution Process of Cavitation in Expander Impeller
摘 要
通过数值模拟确定了膨胀机动叶轮流场环境中的压力波动范围,在高温高压反应釜中模拟膨胀机内气体流场环境对动叶轮材料FV520B-S钢开展不同时间的腐蚀试验。然后采用电化学试验和扫描电镜测试分析了腐蚀后FV520B-S钢的电化学性能与腐蚀形貌,研究了动叶轮气蚀的诱发和演变规律。结果表明:腐蚀初期,FV520B-S钢表面钝化膜对基体保护良好,基体表面未出现明显的点蚀,腐蚀6 d后,气泡在金属表面的形成与破裂导致了钝化膜的破坏,基体表面出现了明显的气蚀坑;在持续的气蚀作用下,FV520B-S钢表现出活化腐蚀特征,腐蚀过程由阳极控制向阴极控制转变。因此,动叶轮的气蚀特征是钝化膜破坏以及氧气扩散作用的结果。
气蚀
诱发与演变
expander impeller
cavitation
induction and evolution
Abstract
The pressure fluctuation range in the flow field environment of the expander impeller was determined by numerical simulation. The corrosion tests of different time were carried out for impeller material of FV520B-S steel in the simulated working environment of gas flow field in expander using a high temperature and high pressure reactor. Then the electrochemical properties and corrosion morphology of the FV520B-S steel after corrosion were analyzed by electrochemical test and scanning electron microscopy, and the induction and evolution of cavitation in impeller were studied. The results showed that at the beginning of the experiment the passivation film on the surface of the FV520B-S steel had a good protection to the substrate, so there were no obvious pits on the substrate surface. After corrosion for 6 days, the formation and rupture of bubbles on the metal surface led to the destruction of the passivation film, so obvious cavitation pits appeared on the metal surface. Under continuous cavitation, the FV520B-S steel exhibited an activated corrosion characteristic. The corrosion process changed from anode control to cathode control. Therefore, the cavitation characteristics of the impeller were the result of the destruction of passivation film and the action of oxygen diffusion.
中图分类号 TG172 DOI 10.11973/fsyfh-202311005
所属栏目 试验研究
基金项目
收稿日期 2021/9/6
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: HUANG Jingdong. Induction Mechanism and Evolution Process of Cavitation in Expander Impeller[J]. Corrosion & Protection, 2023, 44(11): 24
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】刘鸿德. 透平膨胀机的关键控制技术研究[D].杭州:杭州电子科技大学,2017.
【2】闫静文, 杨柯峰,侯佳,等.有机朗肯循环膨胀机的研究进展和应用现状[J].热力发电,2019,48(7):10-18.
【3】REVEL P,KIRCHER D,BOGARD V.Experimental and numerical simulation of a stainless steel coating subjected to thermal fatigue[J].Materials Science and Engineering:A,2000,290(1/2):25-32.
【4】CABRINI M,LORENZI S,PASTORE T,et al.Materials selection for dew-point corrosion in geothermal fluids containing acid chloride[J].Geothermics,2017,69:139-144.
【5】BASHIR A,DUDZI AN'G SKI W,DUDZI AN'G SKI M,et al.Corrosion fatigue crack propagation rates for steam turbine blade 13% Cr steels[J].Solid State Phenomena,2015,227:7-10.
【6】彭岳峰, 徐柱,吴小亮,等.海水升压泵泵轴腐蚀失效分析[J].金属热处理,2019,44(S1):384-387.
【7】余仁强, 何建军,李微,等.火电厂循环泵叶轮材料Cr30A在脱硫浆液腐蚀环境中的交互损伤失效行为研究[J].中国腐蚀与防护学报,2019,39(4):353-358.
【8】杜兆伟, 李华峰,伍志明,等.某船海水泵叶轮失效原因分析[J].材料保护,2019,52(6):179-183.
【9】XU D,HUANG W,RUSCHAU G,et al.Laboratory investigation of MIC threat due to hydrotest using untreated seawater and subsequent exposure to pipeline fluids with and without SRB spiking[J].Engineering Failure Analysis,2013,28:149-159.
【10】NEŠIĆ S.Key issues related to modelling of internal corrosion of oil and gas pipelines-A review[J].Corrosion Science,2007,49(12):4308-4338.
【11】PHILIPPE L V S,LYON S B,SAMMON C,et al.Validation of electrochemical impedance measurements for water sorption into epoxy coatings using gravimetry and infra-red spectroscopy[J].Corrosion Science,2008,50(3):887-896.
【12】JADHAV N,GELLING V J.Review-the use of localized electrochemical techniques for corrosion studies[J].Journal of the Electrochemical Society,2019,166(11):C3461-C3476.
【13】CÁCERES L,VARGAS T,HERRERA L.Influence of pitting and iron oxide formation during corrosion of carbon steel in unbuffered NaCl solutions[J].Corrosion Science,2009,51(5):971-978.
【14】CAERES L, VARGAS T, PARRA M. Study of the variational carbon steel as a function of dissolved oxygen and NaCl patterns for corrosion kinetics of concentration[J]. Electrochimica Acta, 2009, 54:7435-7443.
【15】HOSEINIEH S M,HOMBORG A M,SHAHRABI T,et al.A novel approach for the evaluation of under deposit corrosion in marine environments using combined analysis by electrochemical impedance spectroscopy and electrochemical noise[J].Electrochimica Acta,2016,217:226-241.
【2】闫静文, 杨柯峰,侯佳,等.有机朗肯循环膨胀机的研究进展和应用现状[J].热力发电,2019,48(7):10-18.
【3】REVEL P,KIRCHER D,BOGARD V.Experimental and numerical simulation of a stainless steel coating subjected to thermal fatigue[J].Materials Science and Engineering:A,2000,290(1/2):25-32.
【4】CABRINI M,LORENZI S,PASTORE T,et al.Materials selection for dew-point corrosion in geothermal fluids containing acid chloride[J].Geothermics,2017,69:139-144.
【5】BASHIR A,DUDZI AN'G SKI W,DUDZI AN'G SKI M,et al.Corrosion fatigue crack propagation rates for steam turbine blade 13% Cr steels[J].Solid State Phenomena,2015,227:7-10.
【6】彭岳峰, 徐柱,吴小亮,等.海水升压泵泵轴腐蚀失效分析[J].金属热处理,2019,44(S1):384-387.
【7】余仁强, 何建军,李微,等.火电厂循环泵叶轮材料Cr30A在脱硫浆液腐蚀环境中的交互损伤失效行为研究[J].中国腐蚀与防护学报,2019,39(4):353-358.
【8】杜兆伟, 李华峰,伍志明,等.某船海水泵叶轮失效原因分析[J].材料保护,2019,52(6):179-183.
【9】XU D,HUANG W,RUSCHAU G,et al.Laboratory investigation of MIC threat due to hydrotest using untreated seawater and subsequent exposure to pipeline fluids with and without SRB spiking[J].Engineering Failure Analysis,2013,28:149-159.
【10】NEŠIĆ S.Key issues related to modelling of internal corrosion of oil and gas pipelines-A review[J].Corrosion Science,2007,49(12):4308-4338.
【11】PHILIPPE L V S,LYON S B,SAMMON C,et al.Validation of electrochemical impedance measurements for water sorption into epoxy coatings using gravimetry and infra-red spectroscopy[J].Corrosion Science,2008,50(3):887-896.
【12】JADHAV N,GELLING V J.Review-the use of localized electrochemical techniques for corrosion studies[J].Journal of the Electrochemical Society,2019,166(11):C3461-C3476.
【13】CÁCERES L,VARGAS T,HERRERA L.Influence of pitting and iron oxide formation during corrosion of carbon steel in unbuffered NaCl solutions[J].Corrosion Science,2009,51(5):971-978.
【14】CAERES L, VARGAS T, PARRA M. Study of the variational carbon steel as a function of dissolved oxygen and NaCl patterns for corrosion kinetics of concentration[J]. Electrochimica Acta, 2009, 54:7435-7443.
【15】HOSEINIEH S M,HOMBORG A M,SHAHRABI T,et al.A novel approach for the evaluation of under deposit corrosion in marine environments using combined analysis by electrochemical impedance spectroscopy and electrochemical noise[J].Electrochimica Acta,2016,217:226-241.
相关信息
