Electrochemical Impedance and Thermal Characterization of Nano-Reinforced Vinyl Chloride/Vinyl Acetate Coating

摘要

Multi-walled carbon nanotubes (MWCNT) were used to reinforce a poly(vinyl chloride/vinyl acetate) copolymer (VYHH) in order to evaluate barrier properties against corrosion. Both neat and nano-filled coatings were applied to steel substrates with two discrete target thicknesses: 30-40 microns and 60-75 microns. Coated and control samples were submerged in a tank with a 5% NaCl solution for 45 days Electrochemical Impedance Spectroscopy (EIS) revealed that coating thickness plays a role in corrosion resistance Differential Scanning Calorimetry (DSC) showed that the addition of MWCNTs improved the thermal stability of the VYHH. It was concluded that corrosion resistance is both a function of the MWCNT addition and the thickness of the coating.