Anticorrosive epoxy coatings based on polydopamine modified molybdenum disulfide

Introducing inorganic layered nanomaterials into polymer arrays is one of the important methods to improve the anti-corrosion performance of epoxy coatings, but the compatibility between them is the first problem to be solved. In this study, lamellar molybdenum disulfide (MoS 2 ) is modified by polydopamine (PDA) to improve its dispersibility and anti-corrosion properties in epoxy resin coatings. PDA is firstly coated onto the surface of MoS 2 successfully, which can be proved by FT-IR, Raman and SEM. Then, the PDA modified MoS 2 (MoS 2 @ PDA) is introduced into epoxy resin system to prepare a new epoxy resin coatings (MoS 2 @ PDA/EP). The anticorrosive performance of EP (pure epoxy coatings), MoS 2 /EP and MoS 2 @ PDA /EP coatings are evaluated by electrochemical impedance spectroscopy spectra (EIS), polarization curve and pull-off adhesion tests. Compared to EP coating, the corrosion resistance of MoS 2 @ PDA/EP coating has increased nearby three orders amount and the adhesion strength of MoS 2 @ PDA/EP coating has increased nearby 3 Mpa. So, polydopamine modified MoS 2 (MoS 2 @ PDA) is an effective nanocomposite for preparing high-peroformane anticorrosion epoxy coatings.