Polypyrrole-Modified Molybdenum Disulfide Nanocomposite Epoxy Coating Inhibits Corrosion of Mild Steel

The search for lightweight and low-cost anticorrosion coatings is particularly important in coastal environments with high salt humidity. Graphene-based are currently unable to provide long-lasting corrosion protection metals because of their “corrosion-promoting activity”, graphene-like materials, such as molybdenum disulfide (MoS2), beginning be anticipated its ability protect against metals. This paper reported a simple method preparing polypyrrole (PPy)-modified MoS2 nanomaterials from natural bulk MoS2. Their resistance behavior fillers epoxy (EP) resins was investigated 3.5 wt.% NaCl solution. After the preparation nanosheet dispersion by liquid-phase sonication using ethanol aqueous solution, polypyrrole-coated (MoS2@PPy) were directly obtained adding pyrrole monomer it presence initiator ammonium persulfate. Tafel polarization curves showed that current MoS2@PPy/EP coating 0.006 µA/cm2 after 15 days immersion much lower than pure EP (19.134 µA/cm2), effectively improving anticorrosive properties coating. Overall, this study offered practical application protection.