利用电化学阻抗谱(EIS)研究了Q235在不同含水量滨海盐土中的腐蚀行为.结果表明:在质量分数为10%含水的滨海盐土中,Q235的腐蚀主要受阳极控制,而在20%,34%含水滨海盐土中,其主要受阴极反应中扩散步骤控制.在10%含水滨海盐土中,由于腐蚀面积和深度不断增加,常相位角元件Qdl导纳的模值Qdl-Y0随埋样时间延长而逐渐增加.在20%和34%含水滨海盐土中,Q235表面的氧浓度逐渐下降,Warburg阻抗的导纳在反应初期较大,随时间延长而逐渐减小,当反应进行到一定程度时,试样表面氧扩散速度和还原反应速度逐渐趋于平衡,表面氧浓度的下降速度逐渐减小,Warburg阻抗导纳的下降逐渐趋于缓慢.
参考文献
[1] | RIEMER D;ORAZEM M .A mathematical model for the cathodic protection of tank bottoms[J].Corrosion Science,2005,47(03):849-868. |
[2] | Yun-Fang Wu;Wen-Chi Chiang;Jiann-Kuo Wu .Effect of crystallization on corrosion behavior of Fe_(40)Ni_(38)B_(18)Mo_4 amorphous alloy in 3.5% sodium chloride solution[J].Materials Letters,2008(10/11):1554-1556. |
[3] | MENDOZA A;CORVO F .Outdoor and indoor atmospheric corrosion of carbon steel[J].Corrosion Science,1999,41(01):75-86. |
[4] | MURRAY J;MORAN P .Influence of moisture on corrosion of pipeline steel in soils using in Suit impedance spectroscopy[J].CORROSION,1989,45(01):33-43. |
[5] | H. Hoffmeister .Modeling of Crevice Corrosion of Pure Nickel by Coupling of Phase and Polarization Behavior at Various pH, Chloride, and Oxygen Levels[J].Corrosion: The Journal of Science and Engineering,2005(9):880-888. |
[6] | Ferreira CAM;Ponciano JAC;Vaitsman DS;Perez DV .Evaluation of the corrosivity of the soil through its chemical composition[J].Science of the Total Environment,2007(1/3):250-255. |
[7] | MOUTARLIER V;GIGANDET M .EIS characterisation of anodic films formed on 2024 aluminium alloy in sulphuric acid containing molybdate or permanganate species[J].Corrosion Science,2005,47(04):937-951. |
[8] | YANG D Z;LIU C L;LIU X P et al.EIS diagnosis on the corrosion behavior of TiN coated NiTi surgical alloy[J].Current Applied Physics,2005,5(05):417-421. |
[9] | 魏宝明.金属腐蚀理论及应用[M].北京:化学工业出版社,2004 |
[10] | GARDINER C P;MELCHERS R E .Corrosion of mild steel in porous media[J].Corrosion Science,2002,44:2459-2478. |
[11] | 金名惠,孟厦兰,黄辉桃,杜桂焕.碳钢在我国四种土壤中腐蚀机理的研究[J].华中科技大学学报(自然科学版),2002(07):104-107. |
[12] | 李谋成,林海潮,曹楚南.湿度对钢铁材料在中性土壤中腐蚀行为的影响[J].腐蚀科学与防护技术,2000(04):218-220,233. |
[13] | MURRAY J N;HACK H P .Long-time testing of expoxy-coating steel in ASTM seawater using electrochemical impedance spectroscopy[J].Corrosion,1991,47(06):480-489. |
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