Enhanced corrosion resistance and weathering resistance of waterborne epoxy coatings

This new study focused on the enhanced corrosion resistance and weathering resistance of waterborne epoxy coatings with polyetheramine-functionalised graphene oxide.  Polyetheramine (D230), an epoxy curing agent, was grafted on graphene oxide (GO) surfaces, which can be stably dispersed in a waterborne curing agent for more than 8 months. Waterborne epoxy coatings reinforced by D230-functionalised GO (DGO) were applied on carbon steel surfaces.

According to the electrochemical impedance spectra, the impedance modulus at 0.1 Hz remained at 2.2×109 Ω after 150 days of immersion in 3.5% NaCl with a 0.2 wt% DGO-reinforced waterborne epoxy coatings, whilst that of the neat epoxy coating dropped below 1×107 Ω after 10 days. In addition, the addition of DGO was found to enhance the weathering resistance of waterborne epoxy coatings.  After 60 days of the UV aging test, the yellow colour index of a neat epoxy coating was 1.6 times that of a 0.5 wt% DGO/epoxy coating. The residual pencil hardness of the 0.5 wt% DGO/epoxy coating was three levels higher than that of neat epoxy coating.

The study was published in the Journal of Coatings Technology and Research, Volume 17 (2020).

Related News

ICorr MIC Training Course for 2023

ICorr MIC Training Course for 2023

ICorr Microbiologically Influenced Corrosion (MIC) Training Course Plan for 2023 The Institute of Corrosion (ICorr) is pleased to announce the plan for the MIC training course for 2023. Both the Awareness and Certified MIC Technologist proficiency levels are offered,...

President Handover –  Bill Hedges to Stephen Tate

President Handover – Bill Hedges to Stephen Tate

The Institute of Corrosion is very pleased to announce the successful election of Stephen Tate as its New President and Dr Yunnan Gao as its New Vice President. Stephen has worked with Aberdeen Branch Committee for the past 11 yrs in various roles and has twice been...

New ICorr MIC Training Course Available

New ICorr MIC Training Course Available

The Institute of Corrosion (ICorr) is delighted to announce that we have developed a Microbiologically Influenced Corrosion (MIC) course to meet the increasing demand from industry. MIC is the least understood phenomenon of corrosion despite the number of high-profile...

ICorr office will be closed from Thursday 22nd December 2022, and will reopen Tuesday 3rd January 2023

X