In order to develop a new way of efficient utilization of corrosion inhibitors,a corrosion inhibited poly(o-toluidine)-graphene oxide-based anticorrosive materials was prepared by using graphene oxide as the substrate,poly(o-toluidine)microcapsules as the wall material and 2-mercaptobenzothiazole as the corrosion inhibitor as the core material,and it was used as the filler for the modification of waterborne epoxy resin coating(WEP).The struc-ture and morphology of the coating were characterized by FTIR,XRD,XPS and SEM.The release behavior of the cor-rosion inhibitor was analyzed by UV-Vis spectroscopy.The tensile property and anti-corrosion properties of the coating were evaluated by universal testing machine,electrochemical test and salt spray test.The results show that the corrosion inhibitor is successfully coated inside poly(o-toluidine)microcapsules,and the microcapsules are connected to the surface of the modified graphene oxide by covalent bond,so that the corrosion inhibitor is fully utilized,and the tensile property,self-healing properties and shielding properties of the coating against corrosive media are improved.UV-vis spectrum test results show that the release of corrosion inhibitor in microcapsules reaches 78%after 96 h of artificial damage.The tensile property test results show that,compared with pure WEP,the coating stress increases from 14.281 MPa to 24.25 MPa when the filler content is 0.3wt%.SEM results show that the scratched coating self-healing after 10 h at room temperature.The electrochemical test and salt spray test results show that the corrosion potential of the coating increases from-0.6216 V to-0.1554 V,the corrosion current density decreases from 4.271×10-7 A·cm-2 to 1.016×10-11 A·cm-2,and the impedance modulus can reach 1.5757×109 Ω·cm2.After 500 h of salt spray,the corrosion resistance is still good.
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