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<p>Because of the diverse industrial applications of anti-corrosion coatings, the use of metal–organic frameworks (MOFs) to improve the anti-corrosion performance of coatings has become a widely explored topic of research. In this paper, we report a facile and environmentally friendly method for the cathodic electrochemical synthesis of single- and multimetallic chromium-based MOF thin films to improve the corrosion resistance of carbon steel (CS) substrates in acidic media. The synthesized M-BTC (M = Cr, Cr,Ni, Cr,Zn and Cr,Ni,Zn) thin films on CS were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The results demonstrated the remarkable success of this method in the one-step synthesis of a tri-metallic Cr,Ni,Zn-BTC MOF film. The electrochemical evaluation confirmed a two-order increase in corrosion resistance compared to pure CS. In particular, the corrosion current density (<i>j</i><sub>corr</sub>) was significantly reduced, from 84.52 µA cm<sup>−2</sup> for pure CS to 0.29 µA cm<sup>−2</sup> for the Cr,Ni,Zn-BTC/CS film. Furthermore, electrochemical impedance spectroscopy (EIS) analysis confirmed that the multimetallic structures, in particular Cr,Ni,Zn-BTC, exhibit superior charge transfer resistance (<i>R</i><sub><i>c</i>t</sub>), which is attributed to a synergistic active protection mechanism based on the formation of stable hydroxide precipitates (Zn(OH)<sub>2</sub>/Ni(OH)<sub>2</sub>) in an acidic environment. This method provides a robust and scalable strategy for surface modification with high anti-corrosion efficiency.</p>

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Designing anti-corrosion chromium-based multimetallic MOF thin films for increasing the corrosion resistance of carbon steel in hydrochloric acid media

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Razieh Sobhi Amjad,
  • Sadegh Khazalpour,
  • Seyed Javad Ahmadi,
  • Mustafa Aghazadeh,
  • Hamzeh Forati Rad

摘要

Because of the diverse industrial applications of anti-corrosion coatings, the use of metal–organic frameworks (MOFs) to improve the anti-corrosion performance of coatings has become a widely explored topic of research. In this paper, we report a facile and environmentally friendly method for the cathodic electrochemical synthesis of single- and multimetallic chromium-based MOF thin films to improve the corrosion resistance of carbon steel (CS) substrates in acidic media. The synthesized M-BTC (M = Cr, Cr,Ni, Cr,Zn and Cr,Ni,Zn) thin films on CS were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The results demonstrated the remarkable success of this method in the one-step synthesis of a tri-metallic Cr,Ni,Zn-BTC MOF film. The electrochemical evaluation confirmed a two-order increase in corrosion resistance compared to pure CS. In particular, the corrosion current density (jcorr) was significantly reduced, from 84.52 µA cm−2 for pure CS to 0.29 µA cm−2 for the Cr,Ni,Zn-BTC/CS film. Furthermore, electrochemical impedance spectroscopy (EIS) analysis confirmed that the multimetallic structures, in particular Cr,Ni,Zn-BTC, exhibit superior charge transfer resistance (Rct), which is attributed to a synergistic active protection mechanism based on the formation of stable hydroxide precipitates (Zn(OH)2/Ni(OH)2) in an acidic environment. This method provides a robust and scalable strategy for surface modification with high anti-corrosion efficiency.