| In recent years, with the rapid development of petrochemical industries, theusage amount of oil tank and pipeline is gradually increasing, and many accidentsoften happen, such as oil spill, fire and explosions which are caused by corrosion andelectrostatic charge released by friction during transportation and storage of oil. Sodeveloping a new kind of coating with functions of both conducting electrostatic andcorrosion resistance provides a new way to solve the problem above. In this paper,because PES (Polyethersulfone) resin has good mechanical property, high corrosionresistance and good creep resistance, and PTFE (polytetrafluoroethylene) resin haslow friction coefficient, strong chemical stability and good non-stick performance, wechose these two kinds of resins as matrix resin of coating. Then the effects of differentkinds of carbon series conductive fillers, CNTs treated by different kinds of methods,PTFE content, glass flake content and aluminium triphosphate content on PES-PTFEcoating were studied. Through continuous screening and deeper research, finally weprepared coatings with exceptional properties of conducting electrostatic andcorrosion resistance successfully.1. We prepared PES-PTFE coatings with CNTs (carbon nanotubes), Graphite,CB (carbon black), CF (carbon fiber), studied the impacts of the four kinds ofconductive fillers content on PES-PTFE coating properties, and determinedthe optimum conductive filler content of the four kinds of antistatic coating separately.By comparing the performance of the four kinds of coatings, we choseCNTs/PES-PTFE coating with the best comprehensive properties for the nextresearch.2. Due to high specific surface area and surface free energy of CNTs, it isextremely easy to conglomerate and hard to better disperse in resins. So we chose thedispersed CNTs, mica-CNTs, and titanium dioxide-CNTs which were treated bydifferent kinds of methods to make CNTs disperse uniformly in coatings, and we prepared three kinds of antistatic coatings mixed with dispersed CNTs, mica-CNTsand titanium dioxide-CNTs; studied the impacts of CNTs content on coatingproperties, and determined the optimum CNTs content of the three kinds of antistaticcoating separately. By comparing the performance of the three kinds of coatings, wechose the dispersed CNTs/PES-PTFE coating with the best comprehensive propertiesfor the next research.3. In order to study the effects of PTFE content on anti-corrosion properties ofthe dispersed CNTs/PES-PTFE coatings, we prepared the dispersed CNTs/PES-PTFEcoatings with different PTFE content and finally finded when mass ratio between PESand PTFE was8:3, and the comprehensive properties of coating were the best.4. To further enhance anti-corrosion property of the dispersed CNTs/PES-PTFEcoatings (PES:PTFE=8:3), we mixed glass flake and aluminum tripolyphosphateanticorrosive fillers with the coatings separately and prepared two kinds of thedispersed CNTs/PES-PTFE coating with properties of good conducting electrostaticand corrosion resistance, finally we discovered that the coating with10%of glassflake and the coating with30%of aluminum tripolyphosphate had better electricalconductivity, mechanical property and adhesion, the contact angle reached110degree,good thermal stability. Especially anticorrosion property of coating was improved alot, which could achieved a long-term effect protection about720hours. |
