Preparation And Corrosion Resistance Of Graphene Oxide Composite Coatings

With the rapid development of the modern economy,the infrastructure of the construction has been completed.But in the field of civil construction and ship,it can be able to see the shadow of the corrosion.The presence of corrosion caused serious consequences.The traditional anticorrosion coatings have been unable to meet the requirements of contemporary social development,facing huge pressure to anti-corrosion,and it urgently needs the preparation efficient,sustainable development,green new coating and low cost.The paper adopts the nanometer materials to make up and reinforce epoxy resin anticorrosion coatings,using small size effect of nanomaterials and the structure of the special performance.Giving the full play to the physical barrier property priority of two-dimensional graphene oxide on the structure of the nano flake coating anticorrosion,but because of its inherent van der Waals force,it causes the interlayer to reunite and difficulty strip.To solve this problem,this paper uses nanoparticle repair to efficiently open single layer and design coating microstructure to completely solve the difficulty of graphene oxide dispersion.The nanoparticle ZnO uniformly loaded to the surface of the graphene oxide,by SEM?XRD?FTIR and a series of characterization methods,which showed that nanoparticle ZnO and graphene oxide generated new chemical bonds ZnO-O-C,and the repaired nanocomposites(GO-ZnO)of different proportion adde to the epoxy resin matrix.By the standing experiment of composite solution available after 80days,5wt‰GO-ZnO/EP solution dispersion effect was best,and did not appear statified phenomenon and had good retention water.Coating film was prepared by scraping membrane method,and finally doing electrochemical and mechanical properties test indicated 5wt‰GO-ZnO/EP protecting steel substrate had the impedance of highest value,keeping in around 10~4?cm~2;At the same time,the tensile strength of 5wt‰GO-ZnO/EP film was 20.92MPa;the tensile moludus was446.93MPa;and the fracture shrinkage rate was 10.47%.Microstructure controling designing was used to solve the graphene oxide easily reunited difficult problem,putting forward firstly the NBGE(Nacre-Biomimetic GO/EP)structure system,using the spin coating method realized the epoxy resin layers and oxide graphene layers of alternate assembly.Due to the superiority of NBGE structure systems,it can achieve the perfect combination of strength and toughness,so that could high efficiency increase mechanical properties of the film itself,and the film thickness was only 16.25 um,thin and dense.At the same time,the microscopic uniformity and densification of NBGE structural systems were obtained by means of relevant characterization methods and immersion experiments of neutral salt solution.In particular,5NBGE(6+5 EP/GO)film had the most obvious protection effect on steel substrates,and it could achieve long-term anti-corrosion protection.A series of electrochemical and other tests had once again verified the physical barrier of 5NBGE(6+5 EP/GO)film.Finally,the mechanical properties of 5NBGE(6+5EP/GO)film were tested,and it could be concluded that 5NBGE(6+5 EP/GO)film had very good properties,such as tensile strength of 69.1MPa,tensile modulus of385.01MPa and fracture shrinkage rate of 32.56%.The maximum tensile stress of5NBGE(6+5 EP/GO)film was 0.96MPa by adhesive force test.This paper will provide a new idea to solve the dispersion problem,and it also indicates that GO will have important application value in the field of anticorrosive coatings.