Effect Of Fullerenes Nanofiller And Carbon Black Filler Of Corrosion Activities On Paint

Lim , Siang Ying (2009) Effect Of Fullerenes Nanofiller And Carbon Black Filler Of Corrosion Activities On Paint. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This report represents a study on corrosion behaviour of nanofiller paint in the form of pellet immerse into 3.5wt.% ofNaCl, 2wt.% HCl and 2wt.% NaOH solutions. The nanofiller paint was obtained by mixing solvents, resins and hardener (fullerenes at 1 wt.%) together. The paint is mixed with curing agents/hardeners and poured into PVC reinforced hose to form the pellets as it solidified for the used in electrochemical studies, corrosion potential and Tafel diagram were made to study the corrosion behaviour of fullerenes paint and Carbon Black (CB) paint. The surface morphology was investigated by recording the Scanning Electron Microscope (SEM) images of coating before and after corrosion immersion test for the magnification of 500X and 3000X. It is found that the corrosion penetration rate (CPR) of fullerenes paint have reduce by 1 order of magnitude in solutions NaCl and NaOH while it being normal effective in HCl solutions with the addition of only 1 wt.% of fullerenes nanofiller. This suggests that more addition of nanofiller capable of further reduce the magnitude to 2 or more order. Results found for CB paint indicate poor CPR, xl0-2, x1Q-3 and x1Q-3 for NaCl, HCl and NaOH solutions respectively due to its electrical conductivity and water absorption properties. Through analysis using SEM, no corrosion deposit and degradation of polymer is identified thus, it come to a conclusion that CPR value is due to diffusion of water and ions to substrate. EDS scanning indicate the variation of element is less that contributes less to both CPR and corrosion potential but the chemical structure of the filler used is the main reason of reduced CPR values.

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