Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

The corrosion resistance of the composite coatings Polyaniline/Urea-formaldehyde microcapsules containing healing agent

Authors
Iman Badpeyma 1
Ali Ashrafi 2
Mojtaba Nasr Esfahani 3
1 Department of Materials, Najafabad Branch, Islamic Azad Universiy, Najaf Abad, Iran
2 Isfahan University of Technology, Department of Material Engineering, Isfahan, Iran
3 Department of Chemistry, Najaf Abad Branch, slamic Azad Universiy, Najaf Abad, Iran
10.30501/jamt.2635.70279
Abstract
In this study the healing performance of micro-cracks by microcapsules containing linseed oil in the coating of polyaniline as conducting polymer were investigated. The In situ polymerization in the urea - formaldehyde resin was done to produce linseed oil capsules. The synthesized capsules were studied by Scanning Electron Microscope and contents were determined 75% of their oil. The (FTIR) test was performed to verify the success of being microcapsule. The process of Polyaniline coating was performed by using the electrochemical galvanostatic method in 0.7, 0.9, 1, 2 and 3 A/dm2 current densities. The performance of corrosion resistance of the composite coating containing microcapsules was studied by potentiodynamic polarization test in the 3.5 percent solution and immersion in the 5 percent sodium chloride corrosive solution. The results showed that sample coated with a current density of 1 A/dm2 composite with 0/01 weight of microcapsules had very good self-healing and corrosion resistance properties and Efficiency of 95% was determined to protect it.
Keywords
Microcapsules
Linseed oil
Polyaniline
In situ polymerization
Self-healing
Galvanostatic
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Journal of Advanced Materials and Technologies
Volume 3, Issue 4
Winter 2014
Pages 21-33

  • Receive Date 16 August 2014
  • Revise Date 03 January 2015
  • Accept Date 09 February 2015