水溶性聚苯胺对铸铁的缓蚀作用
Corrosion Inhibition of Water-Soluble Polyaniline for Cast Iron
摘 要
利用水溶性聚苯胺作为铸铁的缓蚀剂, 采用全浸腐蚀失重法和扫描电子显微镜(SEM)研究了缓蚀剂在0.2 mol/L硫酸溶液中对铸铁的缓蚀能力。结果表明, 缓蚀率随缓蚀剂浓度的增加而升高, 随浸泡时间的延长和温度的升高而降低。15 ℃和55 ℃时缓蚀剂在铸铁表面的吸附行为遵循Langmuir等温吸附线, 吸附平衡常数分别为9.67 和2.59。SEM观察结果表明, 0.2 mol/L硫酸溶液中添加缓蚀剂对铸铁表面的腐蚀起到了良好的保护作用。
缓蚀剂
失重法
铸铁
吸附
polyaniline
inhibitor
weight loss method
cast iron
adsorption
Abstract
Water-soluble polyaniline was used as a inhibitor for cast iron. The inhibiting ability of the inhibitor for cast iron in 0.2 mol/L H2SO4 was studied using weight loss testing method and scanning electron microscopy (SEM). Experiments showed that the inhibition efficiency increased with the increase in concentration of the inhibitor but decreased with the increase in immersion time and temperature. The adsorption lehavior of the inhibitor molecules on the cast iron surface obeyed Langmuir isotherm at 15 ℃ and 55 ℃, the adsorption equilibrium constant was 9.67 and 2.59 respectively. SEM observations showed that the inhibitor played a significant protective action on cast iron corrosion.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 吉林省科技厅重点资助项目(20100332)
收稿日期 2011/12/21
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备注吴广峰, 教授, 博士,
引用该论文: CHENG Yu,WU Guang-feng,XIA Gang,ZHANG Hui-xuan. Corrosion Inhibition of Water-Soluble Polyaniline for Cast Iron[J]. Corrosion & Protection, 2012, 33(12): 1072
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【2】Deberry D W. Modification of the electrochemical and corrosion behavior of stainless steels with an electroactive coating[J]. Electrochemical Society, 1985, 132(5):1022-1026.
【3】井新利, 王杨勇, 强军锋. 本征态聚苯胺的防腐性能[J]. 中国腐蚀与防护学报, 2004, 24(5):301-305.
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【5】林卫丽, 杜美利, 邓宇强, 等. 缓蚀水溶性聚苯胺的性能及聚合工艺的研究[J]. 腐蚀与防护, 2006, 27(9):443-446.
【6】Ito S, Murata K, Teshima S, et al. Simple synthesis of water-soluble conducting polyaniline[J]. Synthetic Metals, 1998, 96(2):161-163.
【7】Lin H K, Chen S A. Synthesis of new water-soluble self-doped polyaniline[J]. Macromolecules, 2000, 33(22):8117-8118.
【8】林卫丽, 杜美利, 邓宇强. 水溶性聚苯胺对碳钢的缓蚀作用研究[J]. 腐蚀与防护, 2006, 27(7):344-345.
【9】夏刚, 梁立. 聚苯胺水性防腐剂及其制备方法[P]. 中国:CN1778864A, 2006-05-31.
【10】Obot I B, Obi-Egbedi N O. Anti-corrosive properties of xanthone on mild steel corrosion in sulphuric acid:Experimental and theoretical investigations[J]. Current Applied Physics, 2011, 11(3):382-392.
【11】Ahamad I, Prasad R, Quraishi M A. Adsorption and inhibitive properties of some new mannich bases of isatin derivatives on corrosion of mild steel in acidic media[J]. Corrosion Science, 2010, 52(4):1472-1481.
【12】Obot I B, Obi-Egbedi N O. Adsorption properties and inhibition of mild steel corrosion in sulphuric acid solution by ketoconazole:Experimental and theoretical investigation[J]. Corrosion Science, 2010, 52(1):198-204.
【13】Umoren S A, Ogbobe O, Igwe I O, et al. Inhibitor of mild steel corrosion in acidic medium using synthetic and naturally occurring polymers and synergistic halide additives[J]. Corrosion Science, 2008, 50(7):1998-2006.
【14】Behpour M, Ghoreishi S M, Gandomi-Niasar A, et al. The inhibition of mild steel corrosion in hydrochloric acid media by two Schiff base compounds[J]. Journal of Materials Science, 2009, 44(10):2444-2453.
【15】Machnikova E, Whitmire K H, Hackerman N. Corrosion inhibition of carbon steel in hydrochloric acid by furan derivatives[J]. Electrochimica Acta, 2008, 53(20):6024-6032.
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