牺牲阳极截面形状对其服役性能的影响
Effect of the Cross Section Shape on the Performance of Sacrificial Anode
摘 要
采用理论计算和现场试验相结合的方法研究了D形、圆形、正六边行、正方形、梯形以及长方形六种不同截面形状对牺牲阳极服役性能的影响.结果表明,阳极截面为长方形时提供的阴保电流最大,同时自身的电流密度最小.基于此,研究了长宽比(k)对截面形状为长方形的阳极服役性能的影响规律.结果表明,牺牲阳极提供的阴保电流随着k的增大而增大,但阳极自身的腐蚀速率随着k的增大先减小后增大,并在k=4.1时获得最小值.
理论计算
现场试验
截面形状
电化学性能
sacrificial anode
theoretical calculation
field test
cross section shape
electrochemical performance
Abstract
The effects of six different cross-sectional shapes,i.e.D,circular,ortho hexagonal,square,trapezoidal,and rectangular cross-sectional shapes,on the performance of sacrificial anode were investigated by theoretical calculation and field tests.The results showed that when the cross-sectional shape was rectangle,sacrificial anode provided the maximum cathodic protection current,and reached the minimum current density.Based on this,the effects of length to width ratio (k) on the performance of sacrificial anode were explored.The results showed that the cathodic protection current provided by sacrificial anode increased with increasing of k while the current density of the sacrificial anode increased first and then decreased with increasing of k,and reached the minimum value at k=4.1.
中图分类号 TG172
所属栏目 阴极保护
基金项目 北京市燃气集团有限责任公司科研项目
收稿日期 2014/7/25
修改稿日期
网络出版日期
作者单位点击查看
备注杜艳霞(1980-),副教授,博士,从事金属材料的腐蚀与防护研究.
引用该论文: GAO Jia-wei,XING Lin-lin,TANG De-zhi,DU Yan-xia,YIN Zhi-biao. Effect of the Cross Section Shape on the Performance of Sacrificial Anode[J]. Corrosion & Protection, 2015, 36(3): 289
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参考文献
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【3】张万友,王鑫焱,郗丽娟,等.阴极保护技术中牺牲阳极材料的研究进展[J].腐蚀科学与防护技术,2013,25(5):420-424.
【4】黄永昌.电化学保护技术及其应用第三讲牺牲阳极[J].腐蚀与防护,2000,21(5):232-235.
【5】晋春云,王瑞召,张宏杰.牺牲阳极阴极保护在蛇口燃气管道的应用[J].腐蚀与防护,2008,29(7):410-413.
【6】WILSON K,JAWED M,NGALA V.The selection and use of cathodic protection systems for the repair of reinforced concrete structures[J].Construction and Building Materials,2013,39:19-25.
【7】HOU J,ZHANG Q.Corrosion behavior of high potential Mg-Mn sacrificial anode[J].Special Casting & Nonferrous Alloys,2012,32(10):886-889.
【8】SHAMSUDIN S R,RAHMAT A,ISA M C,et al.Electrochemical corrosion behaviour of Mg-(Ca,Mn) sacrificial anodes[J].Advanced Materials Research,2013,795:530-534.
【9】PARDO A,MERINO M C,COY A E,et al.Influence of microstructure and composition on the corrosion behaviour of Mg/Al alloys in chloride media[J].Electrochimica Acta,2008,53(27):7890-7902.
【10】吴荫顺,曹备.阴极保护与阳极保护[M].北京:中石化出版社,2007.
【11】SY/T 0019-1997埋地钢质管道牺牲阳极阴极保护设计规范[S].
【12】GB/T 21448-2008埋地钢质管道阴极保护技术规范[S].
【13】SY/T 0095-2000埋地镁牺牲阳极试样试验室评价的试验方法[S].
【14】胡士信.阴极保护工程手册[M].北京:化学工业出版社,1999.
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