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Evaluation of Coatings by Spectrochemical and Electrochemical Analyses

Excerpt

Protection of metal substrate from the severe attack by corrosion has been as a tough and challenging area of research for long time. However, there are different methods have been employed to prevent corrosion but the complete protection cannot be achieved for longer period. Combination of different organic resins can be a better choice for the improvement of anticorrosion property as such in this paper, two organic resins were chosen to formulate hybrid coating system. Different combinations of the resins were blended. Polyisocyanate was used as the hardener. The crosslink network formation between silicone and polyester resins was explained by Fourier Transform Infrared Spectroscopy (FTIR). FTIR results reveal the crosslink formation between the resins. NH bond, Si-O-Si, Si-O-C functional groups formations have been explained. The binder materials have good mechanical property which was studied by cross hatch test. The corrosion protection ability was evaluated by Electrochemical Impedance Spectroscopy (EIS) by exposing the samples to 3% NaCl solution. EIS experimental results show that the coatings could withstand the corrosive atmosphere for more than 30 days of exposure and having the resistance values more than 106 ohms.

  • Abstract
  • Key Words
  • 1. Introduction
  • 2. Experimental Methods and Materials
  • 3. Results and Discussion
  • 4. Summaries
  • 5. References

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