海水干湿交替环境对铝合金牺牲阳极性能的影响
Effect of Wet-Dry Cycling on Performance of Aluminum Alloy Sacrificial Anodes in Seawater
摘 要
在海水干湿交替条件下研究了干湿比、环境湿度对铝合金牺牲阳极电化学性能的影响，分析了铝合金牺牲阳极的溶解形貌、腐蚀产物以及电流效率，讨论了造成铝阳极电化学性能差异的原因。结果表明: 随着干湿比的增大，铝合金牺牲阳极开路电位和工作电位升高，阳极电流效率由96.4%降低至76.5%，铝合金牺牲阳极表面由均匀腐蚀转变为局部腐蚀；环境湿度的增加在一定程度上加剧了铝合金牺牲阳极的局部腐蚀，降低了其电化学性能。
牺牲阳极
干湿比
湿度
aluminum alloy
sacrificial anode
wet-dry ratio
humidity
Abstract
Effects of wet-dry ratio and humidity on the electrochemical properties of aluminum alloy sacrificial anodes were investigated under the condition of alternation of drying and wetting in seawater. The dissolution morphology, corrosion products and current efficiency of sacrificial anodes were also studied, respectively, to analyze the reasons for performance difference. The results show that with the increase of wet-dry ratio, the open circuit potential and working potential of the sacrificial anodes increased, and the current efficiency of the anodes decreased from 96.4% to 76.5%, and the uniform dissolution of the anodes changed into serious localized corrosion. The increase of humidity also decreased the electrochemical properties of the anodes and enhanced localized corrosion to some extent.
中图分类号 TG174.41 DOI 10.11973/fsyfh-201602016
所属栏目 应用技术
基金项目 科工局技术基础项目(H082012B001)
收稿日期 2015/3/26
修改稿日期
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备注刘广义(1983-),工程师，博士，从事海洋腐蚀与防护研究，
引用该论文: HUANG Zhen-feng,GUO Jian-zhang,LIU Guang-yi,DU Jian-ping,MA Li,CHEN Zhi-jie. Effect of Wet-Dry Cycling on Performance of Aluminum Alloy Sacrificial Anodes in Seawater[J]. Corrosion & Protection, 2016, 37(2): 160
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参考文献
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【3】黄海滨,宋高伟,刘学斌,等. 海洋环境Al-Zn-In-Mg-Ti牺牲阳极腐蚀防护研究[J]. 装备环境工程,2010,7(5):46-48.
【4】SUN H,LIU L,LI Y,et al. The performance of Al-Zn-In-Mg-Ti sacrificial anode in simulated deep water environment[J]. Corrosion Science,2013,77:77-87.
【5】郭炜,文九巴,马景灵. 铝合金牺牲阳极材料的研究现状[J]. 腐蚀与防护,2008,29(8):495-498.
【6】王树森,梁成浩,黄乃宝,等. 铝基牺牲阳极研究进展[J]. 腐蚀科学与防护技术,2011,23(5):369-375.
【7】POURGUARIBSHAHI M,MERATIAN M. Corrosion morphology of aluminium sacrificial anodes[J]. Materials and Corrosion,2014,65(12):1188-1193.
【8】宋积文,兰志刚,王在峰,等. 海洋环境中阴极保护设计与阴极产物膜[J]. 腐蚀与防护,2010,31(4):256-267.
【9】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.
【10】WANG W,HARTT W,CHEN S. Sacrificial anode cathodic polarization of steel in seawater part 1-a novel experimental and analysis methodology[J]. Corrosion Science,1996,52(6):416-427.
【11】MA L,LI K,YAN Y,et al. Low driving voltage aluminum alloy anode for cathodic protection of high strength steel[J]. Advanced Materials Research,2009,79:1047-1050.
【12】林志坚,宋文桑. 钢在厦门海域全浸和潮差区的腐蚀行为分析(摘要)[J]. 腐蚀科学与防护技术,1995,7(3):255.
【13】MU X,WEI J,DONG J,et al. In situ corrosion monitoring of mild steel in a simulated tidal zone without marine fouling attachment by electrochemical impedance spectroscopy[J]. Journal of Materials Science & Technology,2014,30(10):1043-1050.
【14】杨俊雄. 压载水舱牺牲阳极阴极保护研究[J]. 造船技术,1998(8):24-27.
【15】方志刚,刘斌,王涛. 四种典型牺牲阳极在干湿交替环境中的性能评价[J]. 表面技术,2012,41(4):31-34.
【16】孔小东,陈学群,常万顺,等. 干湿交替条件下牺牲阳极保护效果分析[J]. 材料保护,1998,31(12):25-26.
【17】方志刚,刘斌,王涛. 几种牺牲阳极在干湿交替条件下的自放电行为比较[J]. 装备环境工程,2012,9(4):52-56.
【18】方志刚,刘斌,王涛. 干湿交替条件下牺牲阳极再活化性能试验[J]. 舰船科学技术,2013,35(1):65-69.
【19】宋高伟,黄燕滨,丁华东,等. 含Ga铝基牺牲阳极在干湿交替环境下的行为研究[J]. 材料工程,2012(11):18-22.
【20】李威力,闫永贵,陈光,等. Al-Zn-In系牺牲阳极极低温电化学性能研究[J]. 腐蚀科学与防护技术,2009,21(2):122-124.
【21】马燕燕,许立坤,王洪仁,等. 锌合金牺牲阳极海水干湿交替条件下的电化学性能研究[J]. 腐蚀与防护,2007,28(1):9-12.
【22】LOBNIG R E,SICONOLFI D J,MAISANO J,et al. Atmospheric corrosion of aluminum in the presence of ammonium sulfate particles[J]. Journal of the Electrochemical Society,1996,143(4):1175-1182.
【23】El-MAHDY G,KIM K. AC impedance study on the atmospheric corrosion of aluminum under periodic wet-dry conditions[J]. Electrochimica Acta,2004,49(12):1937-1948.
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