Rational Design of Inhibitor-Encapsulated Bio-MOF-1 for Dual Corrosion Protection
Jinhua Feng, Junnan Chen, Shuchang Wang, Miaomiao Jia, Zhiyu Zhang, Tongwen Yu, Ming Xue
Abstract
Searching for the efficient and sustainable inhibitors to defend metal corrosion in the marine environment has received a great deal attention in both academia and industry. In this work, a new strategy was developed to encapsulate benzimidazole (BI) inhibitor guest molecules into the micropores of bio-MOF-1, which was constructed with the other natural adenine inhibitor. Electrochemical characterizations revealed that the slowly sustained release of BI and adenine inhibitors from the BI@bio-MOF-1 composite presented excellent anti-corrosion durability in the whole mild steel corrosion process. The impedance arc value attained approximately 5000 Ω·cm2 at initially 2 h and further increased to 6000 Ω·cm2 after 5 days immersion in 0.5 M NaCl solution, and the inhibition efficiency reached 85.36% due to the synergistic dual inhibitive effect of BI@bio-MOF-1 composite. The dual inhibition-based bio-MOF-1 composite equipped strong metal-chelating capability and response durability, exhibiting high potentiality for metal anti-corrosion applications.