CeO2 modified graphene nanoplatelets composite powders enhanced the cathodic protection of waterborne zinc-rich epoxy coatings

摘要

In this work, the CeO2 particles were loaded on the graphene nanosheets (GNPs) by the one-step hydrothermal method. Then the CeO2-GNPs composite was introduced into the waterborne zinc-rich epoxy (ZRE) coatings as a nanofiller. The morphology and structure of CeO2-GNPs were characterized by XRD, Raman, SEM, TEM, XPS. And the anti-corrosion properties of the CeO2-GNPs /ZRE coatings were investigated by EIS and polarization curves analysis. The results showed that the CeO2 particles with an average diameter of about 140 nm were uniformly distributed on the GNPs. The cathodic protection and permeability resistance of the CeO2-GNPs /ZRE coatings were enhanced significantly due to the excellent dispersivity of the CeO2-GNPs. This work provides a feasible/suitable way for the preparation of the CeO2-GNPs material and has broad application prospects in the field of metal protection.