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Acta Phys. -Chim. Sin.  2005, Vol. 21 Issue (10): 1096-1101    DOI: 10.3866/PKU.WHXB20051007
Article     
Adsorption Behavior of Imidazoline Amide on the Surface of Galvanic Electrode
AI Jun-zhe; GUO Xing-peng; QU Jun-e; CHEN Zhen-yu
Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074
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Abstract  The adsorption behavior of imidazoline amide as a cationic inhibitor for inhibiting galvanic corrosion has been investigated by using electrochemical methods and atomic force microscopy (AFM) technology. The results show that the adsorption behavior of the inhibitor is significantly affected by the excess charge on the metal surface. Carbon steel and stainless steel carry negative and positive excess charges when they are immersed in 1% NaCl solution, respectively. The inhibitor adsorbs on the surface of carbon steel, while it does not adsorb on the surface of stainless steel in aqueous NaCl solution. When the two metals are electrically coupled in NaCl solution, positive and negative excess charges are carried on the carbon steel and the stainless steel, respectively. The inhibitor can adsorb on the surfaces of both carbon steel and stainless steel. However, in this case, the surface coverage of the inhibitor film formed on the carbon steel decreases compared with that on the surface of single carbon steel, and the adsorbability of the inhibitor on the surface of carbon steel is weakened.

Key wordsAtomic force microscopy      Electrochemical method      Adsorption behavior      Surface excess charge      Inhibitor      Galvanic corrosion     
Received: 18 January 2005      Published: 15 October 2005
Corresponding Authors: GUO Xing-peng     E-mail: guoxp@mail.hust.edu.cn
Cite this article:

AI Jun-zhe; GUO Xing-peng; QU Jun-e; CHEN Zhen-yu. Adsorption Behavior of Imidazoline Amide on the Surface of Galvanic Electrode. Acta Phys. -Chim. Sin., 2005, 21(10): 1096-1101.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20051007     OR     http://www.whxb.pku.edu.cn/Y2005/V21/I10/1096

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