Abstract
Silicate coatings are widely used to protect metals from corrosive environments, but their long-term corrosion protection properties are poor, and there is potential for further improvement. In this work, a composite material with excellent anti-corrosion performance was synthesized through organic-inorganic coordination chemical reaction, manganese (Mn) ions and graphene oxide (GO) were dually inbuilt in Zn2SiO4, and then the related structure and anti-corrosion performance were investigated. We firstly prepared Mn-Zn2SiO4 silicate-based material by Mn ions doping, and the anti-corrosion protection property was improved to 255.3% relative to blank epoxy resin coating. Subsequently, to further enhance the corrosion protection properties, GO/Mn-Zn2SiO4 composite material was synthesized, and its corrosion protection property was improved to 426.6% and 167.1% relative to blank epoxy resin coating and Mn-Zn2SiO4, respectively. The GO/Mn-Zn2SiO4 material protected the metal substrate by photogenerating cathode effect, inorganic manganese ion magnetic induction effect, organic two-dimensional GO shielding effect, and cathode second protection effect synergistically. In summary, this work provides a new idea for the development of new anti-corrosion materials.
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