A Novel Nanoflower-like Zn–Cu Bimetallic Organic Framework: Enhanced Comprehensive Corrosion Resistance of Cu-MOF in Epoxy Resin Coatings
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Copper-based metal–organic frameworks (Cu-MOFs) show great promise in corrosion protection due to their large specific surface area and inherent antibacterial properties. However, when applied to epoxy resin (EP) coatings, their tendency to agglomerate and the instability of the passive films formed during corrosion compromise the anticorrosion performance of the composite materials. To overcome these challenges, this study synthesized a series of zinc–copper bimetallic MOFs (Zn/Cu-MOFs) by incorporating zinc ions with similar ionic radii during the synthesis process. The surface morphology and ion release characteristics of the Zn/Cu-MOFs were comprehensively characterized using FE-SEM, XRD, FTIR, XPS, and ICP-OES. Subsequently, taking Zn 10 /Cu-MOF (fabricated with a Zn 2+ -to-Cu 2+ volume ratio of 1:9) as an example, the anticorrosion performance of the nanoparticles was assessed in both solution and coating systems. Remarkably, Zn 10 /Cu-MOF nanoparticles achieved a corrosion inhibition efficiency of 89.7% for carbon steel after 24 h of immersion. Furthermore, electrochemical impedance spectroscopy (EIS) and salt spray tests on the coatings demonstrated that Zn 10 /Cu-MOFs impart efficient corrosion resistance and self-healing ability to the EP matrix. After 40 days of immersion in 3.5 wt % NaCl solution, the Zn 10 /Cu-MOF@EP coating exhibited a significantly higher low-frequency impedance modulus (| Z | 0.01 Hz ≈ 10 8 Ω·cm 2 ) compared to Cu-MOF@EP (∼10 6 Ω·cm 2 ) and pure EP (∼10 5 Ω·cm 2 ).
Source: ACS Omega
Authors: Dongpeng Sun, Shumei Kang, Jinghao Li, Hong Chen, Xintong Li, Hongyan Qi
Institution: University of Science and Technology Liaoning
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Awards: G4326913830, G7151720587
OpenAlex ID: W4416510429