一种简单有效的船体外加电流阴极保护设计方法
|
摘要
目的提出一种简单确定外加电流大小和辅助阳极位置的方法。方法 对阳极的位置进行离散处理,通过Matlab中的脚本程序,控制COMSOL有限元软件的运行,交替地调整电流大小和阳极位置,经过搜索,找到最佳阳极布局和相应的最小输入电流。采用这一方案进行有限元计算。结果船体表面全部得到了保护,保护率为100%,每个阳极所需电流只有0.057 26 A,最高保护电位为0.84 V左右,过保护现象不严重。结论提出的方法能够较好地解决外加电流阴极保护设计中遇到的难题,具有简单、易操作的优点,并具有普适性。
The work aims to propose a simple method to determine the impressed current magnitude and position of auxiliary anode. The position of the anode was discretely processed at first. Then, the script program in Matlab was used to control the operation of the finite element software for calculating the optimal anode layout and corresponding minimum input current(COMSOL). The optimal anode layout and the corresponding input current were finally achieved by alternatively adjusting the current magnitude and anode position after search. This scheme was used for finite element calculation. The whole surface of the hull could be protected and the protection rate was 100%. The corresponding current required for each anode was only 0.057 26 A,and the highest protection potential was about ～0.84 V. The over-protection phenomenon was negligible. The problems encountered in the design of impressed current cathodic protection have been solved by the method proposed above, which has the advantages of simplicity, easy operation and universality.
The work aims to propose a simple method to determine the impressed current magnitude and position of auxiliary anode. The position of the anode was discretely processed at first. Then, the script program in Matlab was used to control the operation of the finite element software for calculating the optimal anode layout and corresponding minimum input current(COMSOL). The optimal anode layout and the corresponding input current were finally achieved by alternatively adjusting the current magnitude and anode position after search. This scheme was used for finite element calculation. The whole surface of the hull could be protected and the protection rate was 100%. The corresponding current required for each anode was only 0.057 26 A,and the highest protection potential was about ～0.84 V. The over-protection phenomenon was negligible. The problems encountered in the design of impressed current cathodic protection have been solved by the method proposed above, which has the advantages of simplicity, easy operation and universality.
引文
[1]王巍.几种金属在海水中阴极保护数值计算及瞬态激励影响研究[D].青岛:中国科学院海洋研究所,2011.WANG Wei.Numerical simulation of cathodic protection and transient impulse influence for structures in seawater[D].Qingdao:Institute of Oceanology,Chinese Academy of Science,2011.
[2]刘存,赵增元,马永青.海洋结构物牺牲阳极阴极保护设计方法探讨[J].全面腐蚀控制,2011,25(9):7-10.LIU Cun,ZHAO Zeng-yuan,MA Yong-qing.Conclusion of galvanic anode cathodic protection for offshore structures[J].Total corrosion control,2011,25(9):7-10.
[3]曾晓燕.船体外加电流阴极保护系统设计中问题的探讨[J].中国航海,2009,32(8):93-96.ZENG Xiao-yan.Study on the distribution of protection current and protection potential in impressed current cathode protection system design[J].Navigation of China2009,32(8):93-96.
[4]郝宏娜,李自力.阴极保护数值模拟计算边界条件的确定[J].油气储运,2011,30(7):504-507.HAO Hong-na,LI Zi-li.Determination of boundary conditions for cathodic protective numerival simulation[J].Oil&gas storage and transportation,2011,30(7):504-507.
[5]陈迎春,王新华,王翠.X65和X80管线钢在大港模拟土壤溶液中的阴极保护参数研究[J].表面技术,2018,47(6):218-223.CHEN Ying-chun,WANG Xin-hua,WANG Cui.Cathodic protection parameters of X65 and X80 pipeline steels in Dagang simulated soil solution[J].Surface technology,2018,47(6):218-223.
[6]SERGIO L,TOMMASO P,TIZIANO B.Cathodic protection modelling of a propeller shaft[J].Corrosion Science,2016(100):36-46.
[7]KEAR G,BARKER B D,STOKES K R.Corrosion and impressed current cathodic protection of copper-based materials using a bimetallic rotating cylinder electrode(BRCE)[J].Corrosion science,2005,47(7):1694-1705.
[8]潘峻,熊建波,丁建军.淡海水环境下钢结构阴极保护的设计与实现[J].施工技术,2013,42(5):261-263.PAN Jun,XIONG Jian-bo,DING Jian-jun.Cathodic protection design for steel structure in brackish water[J].Construction technology,2013,42(5):261-263.
[9]余晓毅,赵赫,常炜.基于数值模拟的海上平台阴极保护系统的技术研究[J].装备环境工程,2017,14(2):81-84.YU Xiao-yi,ZHAO He,CHANG Wei.Technical research on cathode protection system of offshore platform based on numerical simulations[J].Equipment environmental engineering,2017,14(2):81-84.
[10]王弯弯,张胜寒,张秀丽.沿海及盐渍地区输电杆塔混凝土钢筋阴极保护技术研究[J].华北电力技术,2016(8):13-17.WANG Wan-wan,ZHANG Sheng-han,ZHANG Xiu-li.research on cathodic protection of reinforced concrete transmission tower in salinization and coastal areas[J].North China electric power,2016(8):13-17.
[11]谢飞,王月,王兴发.辽河油田土壤中溶解氧对X70管线钢腐蚀的影响[J].表面技术,2018,47(10):186-191.XIE Fei,WANG Yue,WANG Xing-fa.Effect of dissolved oxygen on corrosion of X70 pipeline steel in Liaohe oilfield[J].Surface technology,2018,47(10):186-191.
[12]朱万武,许杨溢.船体外加电流阴极保护的应用[J].广东造船,2011(1):55-58.ZHU Wan-wu,XU Yang-yi.Application of impressed current cathode protection system for hull[J].Guangdong shipbuilding,2011(1):55-58.
[13]尚兴彬,胡乃科,张守峰.外加电流阴极保护电流屏蔽与阴极干扰研究[J].石油化工腐蚀与防护,2015,32(6):14-18.SHANG Xing-bin,HU Nai-ke,ZHANG Shou-feng.Study on current shielding and interference of impressed current cathodic protection[J].Corrosion&protection in petrochemical industry,2015,32(6):14-18.
[14]孙斌,王广,赵文革.沙钢取水船阴极保护技术的应用[J].城市建筑,2013(22):332-334.SUN Bin,WANG Guang,ZHAO Wen-ge.Application of the Shagang water boat cathodic protection technology[J]Urbanism and architecture,2013(22):332-334.
[15]刘极莉.船体内舱阴极保护设计技术研究[D].大连:大连理工大学,2005.LIU Ji-li.Study on cathodic protection design technology of ship internal tank[D].Dalian:Dalian University of Technology,2005.
[16]RP-B401-2010,Cathodic Protection Design[S].
[2]刘存,赵增元,马永青.海洋结构物牺牲阳极阴极保护设计方法探讨[J].全面腐蚀控制,2011,25(9):7-10.LIU Cun,ZHAO Zeng-yuan,MA Yong-qing.Conclusion of galvanic anode cathodic protection for offshore structures[J].Total corrosion control,2011,25(9):7-10.
[3]曾晓燕.船体外加电流阴极保护系统设计中问题的探讨[J].中国航海,2009,32(8):93-96.ZENG Xiao-yan.Study on the distribution of protection current and protection potential in impressed current cathode protection system design[J].Navigation of China2009,32(8):93-96.
[4]郝宏娜,李自力.阴极保护数值模拟计算边界条件的确定[J].油气储运,2011,30(7):504-507.HAO Hong-na,LI Zi-li.Determination of boundary conditions for cathodic protective numerival simulation[J].Oil&gas storage and transportation,2011,30(7):504-507.
[5]陈迎春,王新华,王翠.X65和X80管线钢在大港模拟土壤溶液中的阴极保护参数研究[J].表面技术,2018,47(6):218-223.CHEN Ying-chun,WANG Xin-hua,WANG Cui.Cathodic protection parameters of X65 and X80 pipeline steels in Dagang simulated soil solution[J].Surface technology,2018,47(6):218-223.
[6]SERGIO L,TOMMASO P,TIZIANO B.Cathodic protection modelling of a propeller shaft[J].Corrosion Science,2016(100):36-46.
[7]KEAR G,BARKER B D,STOKES K R.Corrosion and impressed current cathodic protection of copper-based materials using a bimetallic rotating cylinder electrode(BRCE)[J].Corrosion science,2005,47(7):1694-1705.
[8]潘峻,熊建波,丁建军.淡海水环境下钢结构阴极保护的设计与实现[J].施工技术,2013,42(5):261-263.PAN Jun,XIONG Jian-bo,DING Jian-jun.Cathodic protection design for steel structure in brackish water[J].Construction technology,2013,42(5):261-263.
[9]余晓毅,赵赫,常炜.基于数值模拟的海上平台阴极保护系统的技术研究[J].装备环境工程,2017,14(2):81-84.YU Xiao-yi,ZHAO He,CHANG Wei.Technical research on cathode protection system of offshore platform based on numerical simulations[J].Equipment environmental engineering,2017,14(2):81-84.
[10]王弯弯,张胜寒,张秀丽.沿海及盐渍地区输电杆塔混凝土钢筋阴极保护技术研究[J].华北电力技术,2016(8):13-17.WANG Wan-wan,ZHANG Sheng-han,ZHANG Xiu-li.research on cathodic protection of reinforced concrete transmission tower in salinization and coastal areas[J].North China electric power,2016(8):13-17.
[11]谢飞,王月,王兴发.辽河油田土壤中溶解氧对X70管线钢腐蚀的影响[J].表面技术,2018,47(10):186-191.XIE Fei,WANG Yue,WANG Xing-fa.Effect of dissolved oxygen on corrosion of X70 pipeline steel in Liaohe oilfield[J].Surface technology,2018,47(10):186-191.
[12]朱万武,许杨溢.船体外加电流阴极保护的应用[J].广东造船,2011(1):55-58.ZHU Wan-wu,XU Yang-yi.Application of impressed current cathode protection system for hull[J].Guangdong shipbuilding,2011(1):55-58.
[13]尚兴彬,胡乃科,张守峰.外加电流阴极保护电流屏蔽与阴极干扰研究[J].石油化工腐蚀与防护,2015,32(6):14-18.SHANG Xing-bin,HU Nai-ke,ZHANG Shou-feng.Study on current shielding and interference of impressed current cathodic protection[J].Corrosion&protection in petrochemical industry,2015,32(6):14-18.
[14]孙斌,王广,赵文革.沙钢取水船阴极保护技术的应用[J].城市建筑,2013(22):332-334.SUN Bin,WANG Guang,ZHAO Wen-ge.Application of the Shagang water boat cathodic protection technology[J]Urbanism and architecture,2013(22):332-334.
[15]刘极莉.船体内舱阴极保护设计技术研究[D].大连:大连理工大学,2005.LIU Ji-li.Study on cathodic protection design technology of ship internal tank[D].Dalian:Dalian University of Technology,2005.
[16]RP-B401-2010,Cathodic Protection Design[S].