Application of nanoporous cobalt-based ZIF-67 metal-organic framework (MOF) for construction of an epoxy-composite coating with superior anti-corrosion properties

In this study, for the first time, the ZIF-67 NPs were synthesized and used as a corrosion inhibitor container to enhance the barrier/active corrosion protection features of the epoxy coating. The protection performance of the ZIF-67 and ZIF-67@APS NPs filled epoxy composites was evaluated by EIS, salt-fog, and cathodic delamination experiments. The coating resistance values of the ZIF-67 and ZIF-67@APS NPs filled epoxy coatings reduced from 3.49 x 10(10) Omega. cm(2) to 2.47 x 10(9) Omega. cm(2) and from 8.16 x 10(10) Omega. cm(2) to 5.78 x 10(9) Omega. cm(2), respectively, after 50 days of immersion. The active corrosion inhibition effect of the epoxy/ZIF-67@APS NPs was demonstrated by electrochemical achievements.

Automated summary

The study demonstrated for the first time the synthesis and use of ZIF-67 NPs as a corrosion inhibitor container to enhance the barrier/active corrosion protection features of epoxy coatings. The active corrosion inhibition effect of the epoxy/ZIF-67@APS NPs was proven through electrochemical achievements.