Understanding the impact of inhibitor concentration, immersion periods, and temperature on the corrosion inhibition of 2-piperazin-1-yl-1,3-benzothiazole in HCl solution

The corrosion inhibition potential of 2-piperazin-1-yl-1,3-benzothiazole (PYB) for mild steel in 1.0 M hydrochloric acid (HCl) was comprehensively investigated through weight loss measurements and quantum chemical calculations.The study delved into the influence of various corrosion inhibition parameters, including PYB concentration, immersion times, and temperature.Remarkably, the highest inhibition efficiency of PYB reached 90.7% at a concentration of 0.5 mM and a temperature of 303 K. Notably, inhibition efficiency demonstrated an upward trend with increasing concentration.Weight loss techniques affirmed that inhibition efficiency correspondingly increased with prolonged immersion times, as well as with elevated temperature.Furthermore, the observed higher inhibition performance with increasing temperature was corroborated by the calculated ΔG° values, suggesting that PYB actively participates in both physical and chemical adsorption processes on the mild steel surface.