article · Journal of Dispersion Science and Technology
Cinnamon extract functions as an environmentally friendly corrosion inhibitor for X65 carbon steel exposed to one molar sulphuric acid. Testing across electrochemical, chemical, and computational methods indicates that protection improves as inhibitor concentration increases and as temperature decreases. At a concentration of 450 milligrams per litre, the extract delivers an anticorrosion efficacy of 95.83 percent under potentiodynamic polarisation. The treatment reduces mass loss and corrosion current density while increasing charge transfer resistance and shifting pitting potentials in a noble direction. The extract acts as a mixed-type inhibitor that adsorbs onto the steel surface through a combination of physical and chemical interactions governed by the Langmuir isotherm. Computational analyses of individual components show that cinnamaldehyde and cinnamic acid are the primary contributors to this protective action.
Industrial steel components frequently degrade when exposed to aggressive acidic solutions, leading to costly maintenance and asset failure. Conventional synthetic corrosion inhibitors are often toxic or hazardous to handle. Using a plant-derived alternative like cinnamon extract offers an effective, economically feasible, and safe solution to protect equipment while reducing environmental and occupational health hazards.
This work demonstrates potential use in industries handling sulphuric acid and carbon steel infrastructure, such as chemical processing and pipeline maintenance. It provides an eco-friendly formulation for industrial treatment suppliers seeking alternatives to toxic chemicals. Because the findings are based on laboratory electrochemical tests and computational simulations, the technology remains at an early stage of research, requiring field validation and formulation scale-up before commercial deployment.
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The effectiveness of cinnamon extract as an environmentally friendly corrosion inhibitor for X65 carbon steel (X65CSt) in a 1 mol/L H2SO4 solution was examined using electrochemical, chemical, and computational techniques. This inhibitor has many advantages, it is safe, environmentally friendly, harmless to human health, and economically feasible. The anticorrosion efficacy rises with rising the concentration of the cinnamon extract and reducing temperature and reaches 95.83% at 450 mg l−1 of cinnamon extract using potentiodynamic polarization. All the investigated methods confirm the anticorrosion ability of cinnamon extract as indicated by the reduced the corrosion current density values and mass loss as well as the greater charge transfer resistance. In addition, the values of the pitting potentials were also transformed in a more noble direction implying the resistance of pitting attack. The polarization technique categorized the cinnamon extract as a mixed inhibitor. The mechanism of inhibition was demonstrated in terms of adsorption of the main components of cinnamon extract onto the surface of X65CSt. of the adsorption of the main components of the cinnamon extract on the surface of the X65CSt and this adsorption is of combined type between both physical and chemical modes, as determined by the computed values of free energy of adsorption, which range between −46.96 and −37.42 kJ. mol−1. The adsorption is exposed to Langmuir isotherm. The four components of cinnamon extract were investigated through density functional theory, Monte Carlo, and Molecular dynamic simulation. The quantum parameters and the adsorption of these components on the Fe(110) reveals that cinnamaldehyde and cinnamic acid inhibitors are more effective as corrosion inhibitors.
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DOI: 10.1080/01932691.2024.2333537
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