1. Apple pomace extract: a potent renewable source of active biomolecules for suppressing mild steel aggression in aquatic solution
- Author
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Ghahremani, Pantea, Mostafatabr, Amir Hossein, Dehghani, Ali, Bahlakeh, Ghasem, and Ramezanzadeh, Bahram
- Abstract
Recently, due to special regulations concerning environmental issues, the traditional inhibitors were replaced by green-/natural-based environmentally friendly inhibitors including plant extracts. The present work was investigated to evaluate the apple pomace extract as a potent renewable chemical for inhibiting the metal corrosion progress in a 1 M HCl aquatic solution. After the addition of 1000 ppm apple pomace extract, the electrochemical impedance spectroscopy (EIS) and polarization approaches showed that the steel inhibition index was raised to 90% by controlling the metal dissolution and H-evolution mechanisms. The weight loss study results proved 89% corrosion inhibition efficiency by introducing 1000 ppm apple pomace extract into HCl-containing media. The atomic force microscopy (AFM) and field emission scanning electron microscopy (FE-SEM) surface studies reflected high smooth steel substance availability after inhibition, and contact angle outcomes displayed the semi-hydrophobic nature of the inhibited surfaces. The thermodynamic and adsorption isotherm mechanism evaluation results displayed that the protection occurred via monolayer inhibitor film construction by endothermic adsorption interactions. The entropy values fluctuated between − 75.82 and 0.65 kJ.mol−1which are responsible for the physical/chemical adsorption types. more...
- Published
- 2024
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