Abstract
The present work intended to synthesize a composite material exhibiting self-healing and enhanced anticorrosion properties. In this context, MWCNT incorporated nanocapsule (NC) filler material was synthesized, then it is blended with phenol novolac resin (PNR). The surface characterization studies of MWCNT/NC-PNR composite material signify the nano-size, spherical, and multiwalled structures of NC and CNT. The composite materials consisting of different weight percentages of MWCNT inserted NC were coated on the mild steel (MS) surface by the doctor blade method. The 0.3 wt% MWCNT/NC blended PNR showed significantly enhanced hydrophobicity of the coating which is evidenced by the high value of water contact angle (98.2°) amongst the coating materials prepared. Further, electrochemical impedance spectroscopy (EIS) tests of the coating confirm a high impedance value of 3.039× 107 ohm cm2 at the low frequency region for 50 days of immersion in 3.5 wt% NaCl solution. Thus, it was found that 0.3 wt% MWCNT incorporated NC filler increased the corrosion protection efficiency of NC/PNR coating by 32.61%. Therefore, the results show that the MWCNT/NC-PNR composite coating exhibits significantly elevated corrosion resistance, and can be used as a self-healing inhibitor coating material for long-term anti-corrosion shield.
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