Evaluation of Punica granatum extract as an environmentally safe corrosion inhibitor for carbon steel in a solution of 1 M sulfuric acid
In order to create an eco-friendly corrosion inhibitor Punica granatum extract (PG) was employed as the primary component for use in H2SO4 pickling procedures. The inhibition behaviour of C-steel in H2SO4 has been studied using weightloss tests, polarization curves, electrochemical impedance spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS).The outcomes demonstrate the extract's effective inhibition in 1 M H2SO4. Both an increase in concentration and temperature boosted the effectiveness of the inhibition. With the greater concentration of PG (300 ppm) and the higher applied temperature (45C), the inhibition effectiveness reached 91.7%. Nevertheless, the inhibitory efficacy increased synergistically with the addition of potassium iodide, increasing from 81.5% to 95.0% at 25C using the weight-loss technique. Adsorption on the C-steel caused the inhibitory effect, and this adsorption mechanism was compatible with the Temkin isotherm. According to the free energy of adsorption (ΔGo ads = 39.5 kJ/mol.), the PG extract adheres chemically to the surface of the C-steel. The efficient inhibitor Punica granatum (PG) extract may prevent corrosion of C-steel in H2SO4 solution.The extracts from Punica granatum (PG) are a commonly used green inhibitor that may be used to pickle metals.
Adsorption; C-steel; Punica granatum extract; Sulfuric acid; Synergistic effect; Temkin isotherm
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