Role of different metal precursors based MOFs for boosting an corrosion performance of mild steel in acid media

Benefiting from their significant features such as large specific surface area, adjustable structure and function, regular pore arrangement, and abundant active sites, metal organic frameworks (MOFs) exhibit great application prospects as anti-corrosion materials. Herein, (M-BTC, M=Mn, Fe, and Co, and BTC=benzenetricarboxylate) was prepared under solvothermal conditions and used as a highly efficient inhibitor for the protection of mild steel. The microstructure and physicochemical properties of the compounds were determined by powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR), N2 adsorption, and microscopic analysis. The addition of MOF-based corrosion inhibitors decreases the rate of mild steel surface corrosion in acidic media due to the formation of an adsorbed layer on the metal surface. The inhibition mechanisms obey the Langmuir adsorption isotherm. A Mn-MOF based corrosion inhibitor recorded an inhibition efficiency of 94.7% at 200 ppm. At the end, the future outlooks of prepared MOFs for corrosion protection are provided. We hope this work will illuminate the achievement of high-performing anticorrosion MOFs and offer new ideas for the development of MOF-based materials for future corrosion protection applications.& COPY; 2023 Elsevier Ltd. All rights reserved.

Automated summary

Metal organic frameworks (MOFs) with significant features such as large specific surface area, adjustable structure and function, regular pore arrangement, and abundant active sites, show great potential as anti-corrosion materials. In this study, a MOF-based inhibitor (M-BTC, M=Mn, Fe, and Co, and BTC=benzenetricarboxylate) was prepared through solvothermal conditions and demonstrated high efficiency in protecting mild steel from corrosion. The microstructure and physicochemical properties of the MOFs were analyzed using PXRD, FT-IR, N2 adsorption, and microscopic analysis. The MOF-based corrosion inhibitors form an adsorbed layer on the metal surface, leading to a decrease in the corrosion rate of mild steel in acidic media. The inhibition mechanisms follow the Langmuir adsorption isotherm, with a Mn-MOF based inhibitor achieving an inhibition efficiency of 94.7% at 200 ppm. The future outlook of using prepared MOFs for corrosion protection is discussed, offering new ideas for the development of MOF-based materials for future corrosion protection applications.