Water-based bio-based epoxy coatings for metal substrates

In recently published work, an environmentally friendly hydrophobic coating has been developed for the development of nanoparticles based on bio-based epoxy resins, silane coupled agents (3-epoxy propylene), triple methoxysilane (GLYMO) and hydrophobic curing agents.
apply the coating to the Fe substrate by swirling. For the best coating with a 25.0 weight% nanoparticle load, a sliding angle of 153.0 degrees and a sliding angle of 14.3 degrees

. When immersed in water and common solvents, including ethanol and acetone, for 48 hours, the prepared coatings showed high hydrophobicity. In addition, after 24 hours of continuous circulation of exposure to ultraviolet radiation and water condensation, the optimal coating is capable of maintaining high hydrophobicity at contact angles of up to 142.7 degrees, indicating good weather resistance.
potential to inhibit corrosion in other metal structures
In addition, electrochemical measurements have shown that the optimized coating shows that its corrosion current density is reduced by two orders of magnitude and that its corrosion potential is positively offset to 0.344V. The corresponding suppression efficiency was 93.75%. Absorption energy and diffusion coefficients were calculated using molecular dynamics simulations to further understand corrosion inhibition behavior at the molecular scale. This green bio-based water-repulsive epoxy coating has great potential to inhibit corrosion of other metal structures in harsh working environments.
the study was published in Organic Coatings Progress Volume 136, November 2019, 105265.
.