Preparation and characterization of a chitosan-based low-pH-sensitive intelligent corrosion inhibitor

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• 作者：Yu-ning Wang ; Chao-fang Dong ; Da-wei Zhang…
• 关键词：corrosion inhibitors ; chitosan ; hydrogels ; swelling ; corrosion inhibition ; copper corrosion
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：9
• 页码：998-1004
• 全文大小：1,126 KB
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• 作者单位：Yu-ning Wang (1)
  Chao-fang Dong (1)
  Da-wei Zhang (1)
  Pan-pan Ren (1)
  Li Li (2)
  Xiao-gang Li (1)
  
  1. Corrosion and Protection Center, Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing, 100083, China
  2. Baic Motor Corporation, Ltd., Beijing, 101300, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

A chitosan (CS)-based low-pH-sensitive intelligent corrosion inhibitor was prepared by loading a pH-sensitive hydrogel with benzotriazole (BTA); the pH-sensitive hydrogel was synthetized by crosslinking CS with glutaraldehyde (GTA). Analysis by Fourier- transform infrared (FT–IR) spectroscopy showed that Schiff reactions occurred between amino and aldehyde groups. The swelling ability of the hydrogel was investigated using a mass method, and it was observed to swell more in an acidic environment than in an alkaline environment. The hydrogel’s loading capacity of BTA was approximately 0.377 g·g?, and its release speed was faster in an acidic environment than in an alkaline environment because of its swelling behavior. The corrosion inhibition ability of the intelligent inhibitor was tested by immersion and electrochemical methods. The results showed that after 4 h of immersion, the polarization resistance (R _p) value of copper with the intelligent inhibitor was approximately twice of that of copper with BTA, indicating that the intelligent inhibitor could effectively prevent copper from corroding. Keywords corrosion inhibitors chitosan hydrogels swelling corrosion inhibition copper corrosion