| Assessing the protective performance of nanoclay incorporated silane coating on steel |
| Paper ID : 2516-UFGNSM13-FULL |
| Authors: |
|
Najmeh Asadi1, Mohsen Saremi2 1School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 111554563, Tehran, Iran 2university of tehran |
| Abstract: |
| Nanoparticles incorporation is considered as one of the most effective approaches to improve protective performance of a silane sol-gel coating. This work intends to evaluate the role of clay nanoparticles in corrosion protection of an organofunctional silane layer applied on steel substrate. Through taking advantage of electrochemical impedance spectroscopy and polarization measurement, the optimum hydrolysis and immersion time as key parameters in behavior of the hybrid silane film synthesized by mixing of glycidyloxypropyl–trimethoxysilane (GPS), tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) were determined. In the next step, clay nanoparticles were dispersed in the silane matrix at the optimum condition. Based on the impedance spectra as well as polarization curves the superiority of silane film in the presence of nanoclay could be linked to an enhancement in barrier properties, probably due to thicker and denser network. Furthermore, surface analysis revealed impact of the nanoparticles on the film structure. |
| Keywords: |
| silane sol-gel film; nanoclay; corrosion protection; electrochemical techniques; surface analysis |
| Status : Paper Accepted (Poster Presentation) |
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