Investigation of performance of carbon black nanoparticles/epoxy coating by using accelerated EIS test and the second ficks law

In this study, it was investigated the effect of modified carbon black Nanoparticles to improve anti-corrosion properties of epoxy-based coatings. SDS surfactant was used for decreasing Van Der Walls force between CB nanoparticles.TEM analysis showed CB nanoparticles were dispersed in epoxy matrix by lower than 50 nm. Coatings with 0.5, 1 and 1.75% CB nanoparticles were prepared and EIS technique was used for evaluating of coatings in 65°C. By adding CB nanoparticles, the resistance of coating to corrosive media increased and the capacitance of coating decreased. Diffusion coefficient of water decreased more than 107 times in 1% CB coating than to neat epoxy. It seems that CB nanoparticles fill micro pores in the coating and limit diffusion of corrosive ions and water.