海水电导率对舰船电场等效场源强度影响的实验研究
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摘要
为掌握海水电导率对舰船水下腐蚀相关电场等效场源强度的影响,首先在实验室中模拟舰船船壳、螺旋桨、海洋环境、外加电流阴极保护系统,并通过外加电流使防护对象处于恒定保护电位;然后,在模拟船壳的不同涂层状态下改变海水电导率,分别测量流至船壳、螺旋桨的防腐电流及总的保护电流;最后,对测量结果进行了分析。结果表明:舰船腐蚀相关静态电场等效场源强度是近似正比于海水电导率的。实验研究结果为舰船腐蚀相关电场等效场源的确定及场的推演换算奠定了基础。
In order to master the effects of seawater conductivity on the equivalent field strength of the corrosion related electric field,the hull,propeller of vessels,marine environment and cathodic current protection system are simulated in the laboratory,and through the impressed current,the hull and propeller is at a constant protection potential.And then in different coating states,the total current at different seawater conductivities and the anti-corrosion current to the hull and propeller are measured by changing the seawater conductivity.Through the analysis of the measurement results,the change rule of the equivalent field strength of the static electric field related to the corrosion of the vessels with the seawater conductivity is researched.The experimental results lay a foundation for the determination of equivalent electric field source and the deduction of the corrosion related electric field of vessels.
In order to master the effects of seawater conductivity on the equivalent field strength of the corrosion related electric field,the hull,propeller of vessels,marine environment and cathodic current protection system are simulated in the laboratory,and through the impressed current,the hull and propeller is at a constant protection potential.And then in different coating states,the total current at different seawater conductivities and the anti-corrosion current to the hull and propeller are measured by changing the seawater conductivity.Through the analysis of the measurement results,the change rule of the equivalent field strength of the static electric field related to the corrosion of the vessels with the seawater conductivity is researched.The experimental results lay a foundation for the determination of equivalent electric field source and the deduction of the corrosion related electric field of vessels.
引文
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[2]彭亮,王建勋,邓海华,等.水下非声探测与隐身技术综述[J].舰船科学技术,2014,36(5):6-10.PENG Liang,WANG Jian-xun,DENG Hai-hua,et al.Review of the non-acoustic detection and stealth technology[J].Ship Science and Technology,2014,36(5):6-10.(in Chinese)
[3]WIMMER S A,HOGAN E A,DE GIORGI V G.Dipole modelling and sensor design[J].Simulation of Electrochemical Processes II:WIT Transactions on Engineering Sciences,2007,54:143-152.
[4]ADEY R,BAYNHAM J M W.Predicting corrosion related signatures[J].Simulation of Electrochemical Processes II:WIT Transactions on Engineering Sciences,2007,54:213-223.
[5]DEMILIER L,DURAND C,RANNOU C,et al.Corrosion related electromagnetic signatures measurements and modelling on a 1:40th scaled model[J].Simulation of Electrochemical Processes II:WIT Transactions on Engineering Sciences,2007,54:368-370.
[6]HOITHAM P,JEFFREY I,BROOKING B,et al.Electromagnetic signature modeling and reduction[C]//Conf.Proc.UDT Europe.London:UDT Press,1999.
[7]陈聪,魏勇,姚陆锋,等.基于电流线等效的潜艇磁场估算与仿真[J].电子与信息学报,2015,37(2):461-467.CHEN Cong,WEI Yong,YAO Lu-feng,et al.Estimation and simulation analysis of the submarine magnetic field based on current-line mode[J].Journal of Electronics&Information Technology,2015,37(2):461-467.(in Chinese)
[8]邢少华,张博,闫永贵,等.涂层破损对船体阴极保护电位分布的影响[J].材料开发与应用,2016,31(1):69-73.XING Shao-hua,ZHANG Bo,YAN Yong-gui,et al.The influence of coating damage on cathodic protection potential distribution of ship[J].Development and Application of Materials,2016,31(1):69-73.(in Chinese)
[9]陈聪,李定国,龚沈光.浅海中静态电偶极子电场分布的镜像法研究[J].武汉理工大学学报:交通科学与工程版,2010,34(4):716-720.CHEN Cong,LI Ding-guo,GONG Shen-guang.Research on the electric field produced by static electric dipole lacated in shallow sea with mirror image theory[J].Journal of Wuhan University Technology:Transportation Science&Engineering,2010,34(4):716-720.(in Chinese)
[10]罗晓强,陈聪,陈勇.舰船水下标量电位分布特征研究[J].武汉理工大学学报,2012,34(11):48-52.LUO Xiao-qiang,CHEN Cong,CHEN Yong.Research on the underwater electric potential distribution of a ship[J].Journal of Wuhan University of Technology,2012,34(11):48-52.(in Chinese)