Corrosion protection of copper with 3-glycidoxypropyltrimethoxysilane-based sol–gel coating through 3-amino-5-mercapto-1,2,4-triazole doping

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• 作者：J. Balaji ; M. G. Sethuraman
• 关键词：3 ; Amino ; 5 ; mercapto ; 1 ; 2 ; 4 ; triazole ; 3 ; Glycidoxypropyltrimethoxysilane ; Sol–gel coating ; Corrosion
• 刊名：Research on Chemical Intermediates
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：42
• 期：2
• 页码：1315-1328
• 全文大小：1,447 KB
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• 作者单位：J. Balaji (1)
  M. G. Sethuraman (1)
  
  1. Department of Chemistry, Gandhigram Rural Institute – Deemed University, Gandhigram, Dindigul, 624 302, Tamil Nadu, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Inorganic Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1568-5675

文摘

In this work, 3-amino-5-mercapto-1,2,4-triazole (AMTa) was incorporated into 3-glycidoxypropyltrimethoxysilane (GPTMS)-based sol–gel coatings, which were self-assembled over a copper surface. The AMTa-doped GPTMS-based sol–gel coatings were characterized by Fourier transform infrared spectroscopy, Scanning Electron Microscopy, and Energy-Dispersive X-ray spectroscopy analyses. The protective ability of these coatings was evaluated by electrochemical impedance studies and potentiodynamic polarization measurements in 3.5 % NaCl medium. The AMTa-doped sol–gel coating showed enhanced corrosion protection ability compared to the un-doped GPTMS-based sol–gel coating, which may be largely due to the formation of thiolate bonds between copper and AMTa. The presence of a silane network through the amine group of AMTa could also be a reason for the enhanced protection.