Introducing cyano-functionalized multiwalled carbon nanotubes to improve corrosion resistance and mechanical performance of poly(arylene ether nitrile) coating

Seeking high-performance coating with long service life to protect metallic substrates under complex corrosion environment has attracted abundant attention in modern industry. In this work, poly(arylene ether nitrile) (PEN) was applied as protective coating on metallic substrates for the first time, and the cyano-functionalized multiwalled carbon nanotubes (MWCNTs-CN) was introduced to further enhance the corrosion resistance and mechanical performance of the PEN coating. Electrochemical results demonstrated that the MWCNTs-CN incorporated composite coating possessed outstanding corrosion resistance that the |Z|(0.01Hz) remained 196.9 M omega cm(2) after 100 days' immersion process in 3.5 wt% NaCl solution, which was 2 orders of magnitude higher than the pure PEN coating. Besides, an evident improvement was investigated from the tensile strength of MWCNTsCN/PEN coatings, which showed an increment about 20.1% of tensile strength was gained when 1 wt% of MWCNTs-CN was introduced. Benefiting from these advantages, this work is expected to provide a novel insight in high-performance protective coating.

Automated summary

This study introduces poly(arylene ether nitrile) (PEN) as a protective coating on metallic substrates for the first time, and incorporates cyano-functionalized multiwalled carbon nanotubes (MWCNTs-CN) to enhance corrosion resistance and mechanical performance. The electrochemical results demonstrate outstanding corrosion resistance and improved tensile strength of the MWCNTs-CN/PEN coating. This work provides a novel insight in high-performance protective coating.