Abstract: The polarization curves and galvanic currents of 2024 aluminum alloy and TA15 titanium alloy under different thickness of 3.5wt% NaCl liquid film were measured and the electrochemical kinetic parameters of two kinds of materials under different thickness liquid membranes were determined by applying a liquid membrane thickness measurement apparatus and a three-electrode system with backward inserted micro-distance reference eletrode. To obtain the galvanic current under different liquid film thickness and equivalent conversion factor of galvanic-non galvanic corrosion. The Comsol corrosion simulation model based on the shell current distribution was established.The result manifested that the galvanic current value obtained by the simulation model agreed well with the experimental data, under the thickness of 50 μm liquid film, the galvanic current was about 25 times of that of the solution, with the increase of liquid film thickness, the decrease speed of galvanic current increased gradually. When the liquid film thickness reaches 1 000 μm, the galvanic current approached the solution state,the conversion coefficient of galvanic corrosion at 50 μm and 100 μm liquid film thickness was about 5 times of that without galvanic couple. When the liquid film thickness was more than 100 μm, the conversion coefficient dropped sharply. When the liquid film thickness was 1 000 μm, whether there was galvanic corrosion or not, the conversion coefficient basically tended to 1.
陈跃良,黄海亮,张 勇,卞贵学,王晨光,王安东. 不同液膜厚度下电偶腐蚀当量折算研究[J]. 《材料导报》期刊社, 2018, 32(9): 1571-1576.
CHEN Yueliang, HUANG Hailiang, ZHANG Yong, BIAN Guixue, WANG Chenguang, WANG Andong. Study on Equivalent Conversion of Galvanic Corrosion Under Different Liquid Film Thickness. Materials Reports, 2018, 32(9): 1571-1576.
1 Lin Cui,Xiao Zhiyang.Eletrochemical corrosion behavior of carbon steel under thin electrolyte layer containing NaCl[J].Corrosion & Protection,2014,35(4):316(in Chinese). 林翠,肖志阳.碳钢在NaCl薄液膜下的电化学腐蚀行为[J].腐蚀与防护,2014,35(4):316. 2 Huang H, Guo X, Zhang G, et al. The effects of temperature and electric field on atmospheric corrosion behaviour of PCB-Cu under absorbed thin electrolyte layer[J].Corrosion Science,2011,53(5):1700. 3 Jiang J, Wang J, Lu Y, et al. Effect of length of gas/liquid/solid three-phase boundary zone on cathodic and corrosion behavior of metals[J].Electrochimica Acta,2009,54(5):1426. 4 Cheng Y L, Zhang Z, Cao F H, et al. A study of the corrosion of aluminum alloy 2024-T3 under thin electrolyte layers[J].Corrosion Science,2004,46(7):1649. 5 Pan C, Lv W, Wang Z, et al. Atmospheric corrosion of copper exposed in a simulated coastal-industrial atmosphere[J].Journal of Materials Science & Technology,2017,33(6): 587. 6 Huang H, Pan Z, Guo X, et al. Effect of an alternating electric field on the atmospheric corrosion behaviour of copper under a thin electrolyte layer[J].Corrosion Science,2013,75:100. 7 Huang H, Dong Z, Chen Z, et al. The effects of Cl- ion concentration and relative humidity on atmospheric corrosion behaviour of PCB-Cu under adsorbed thin electrolyte layer[J].Corrosion Science,2011,53(4):1230. 8 Huang H, Guo X, Zhang G, et al. The effects of temperature and electric field on atmospheric corrosion behaviour of PCB-Cu under absorbed thin electrolyte layer[J].Corrosion Science,2011,53(5):1700. 9 Liao X, Cao F, Zheng L, et al. Corrosion behaviour of copper under chloride-containing thin electrolyte layer[J].Corrosion Science,2011,53(10):3289. 10 Liao X, Cao F, Chen A, et al. In-situ investigation of atmospheric corrosion behavior of bronze under thin electrolyte layers using electrochemical technique[J].Transactions of Nonferrous Metals Society of China,2012,22(5):1239. 11 Zhong X, Zhang G, Qiu Y, et al. The corrosion of tin under thin electrolyte layers containing chloride[J].Corrosion Science,2013,66(1):14. 12 Wang Chenguang,Chen Yueliang,Zhang Yong,et al.Corrosion behavior of 7B04 Al-alloy in simulated marine atmospheric environment[J].Journal of Aeronautical Materials,2017,37(1):59(in Chinese). 王晨光,陈跃良,张勇,等.7B04铝合金在模拟海洋大气环境下的腐蚀行为[J].航空材料学报,2017,37(1):59. 13 Li Yakun.Electrochemical behavior research of metal corrosion under thin eletrolyte lay[D].Qingdao: Ocean University of China,2007(in Chinese). 李亚坤.薄液层下金属电化学腐蚀行为研究[D].青岛:中国海洋大学,2007. 14 Deng Zuyu.Eletrochemical behavior of corrosion of X70 steel under thin layer of electrolytes containing hydrogen sulfide[J].Corrosion&Protection,2014(6):557(in Chinese). 邓祖宇.H2S薄层液膜下X70钢的腐蚀电化学行为[J].腐蚀与防护,2014(6):557. 15 Lin Cui,Xiao Zhiyang,Liang Jianneng.Electrochemical corrosion behavior of AZ91D magnesium alloy under thin electrolyte layer containing SO2[J].Materials for Mechanical Engineering,2013,37(6):55(in Chinese). 林翠,肖志阳,梁健能.AZ91D镁合金在SO2薄液膜下的电化学腐蚀行为[J].机械工程材料,2013,37(6):55. 16 Chen Yueliang,Wang Zhefu,Bian Guixue,et al.Equivalent conversion of typical aluminum-titanium alloy in NaCl solution with different concentrations[J].Acta Aeronautica et Astronautica Sinica,2017,38(3):260(in Chinese). 陈跃良,王哲夫,卞贵学,等.不同浓度NaCl溶液下典型铝/钛合金电偶腐蚀当量折算关系[J].航空学报,2017,38(3):260. 17 曹楚南.腐蚀电化学原理(第三版)[M].北京:化学工业出版社,2008. 18 Xu L Y, Cheng Y F. Development of a finite element model for si-mulation and prediction of mechanoelectrochemical effect of pipeline corrosion[J].Corrosion Science,2013,73:150. 19 Zhang Yong,Chen Yueliang,Wang Chenguang.Study on galvanic corrosion of aluminum alloy related joint in simulated coastal wet atmosphere[J].Materials Review B: Research Papers,2016,30(5):152(in Chinese). 张勇,陈跃良,王晨光.模拟沿海大气环境下铝合金搭接件电偶腐蚀行为研究[J].材料导报:研究篇,2016,30(5):152. 20 Chen Yueliang,Wang Chenguang,Zhang Yong,et al.Coating corrosion failure analysis and influence of titanium-steel bolted lap joints[J].Acta Aeronautica et Astronautica Sinica,2016(11):3528(in Chinese). 陈跃良,王晨光,张勇,等.钛-钢螺栓搭接件涂层腐蚀失效分析及影响[J].航空学报,2016(11):3528. 21 刘文珽,李玉海.飞机结构日历寿命体系评定技术[M].北京:航空工业出版社,2004:84.
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2018, Vol. 32 
