Hydroxypropyl Cellulose as an Efficient Corrosion Inhibitor for Aluminium in Acidic Environments: Experimental and Theoretical Approach

Abstract

The adsorption and inhibition performance of hydroxypropyl cellulose (HPC) on aluminium corrosion in 0.5 M HCl and 2 M H 2 SO 4 were investigated at 30-65 °C using potentiodynamic polarization, gravimetric measurement and quantum chemical computation technique respectively. Potentiodynamic polarization results confirmed that HPC acted as a mixed-type inhibitor in both aggressive solutions with a more dominant anodic effect. Results of gravimetric measurement revealed that HPC displayed significant regulatory action on the corrosion of aluminium within the condition studied. Also, aluminium was observed to exhibit higher resistance to dissolution in sulphuric compared to hydrochloric acid. Also, improvement in inhibition efficiency was recorded with an increase in the concentration of inhibitor, but its sustainability was altered with an increase in temperature. The trend of adsorption mechanism proposed was based on the relationship between temperature and inhibition efficiency and computed results of the energy of activation. The adsorption of HPC molecules onto aluminium surface followed the Langmuir adsorption isotherm. Quantum chemical calculations through the aid density functional theory were used to reveal the adsorption strength attractiveness of HPC molecules towards aluminium surface.

Recent developments in sustainable corrosion inhibitors: design, performance and industrial scale applications

“…Table 2 represents the collection of cellulose derivatives used as corrosion inhibitors [183][184][185][186][187][188][189][190][191][192][193][194][195][196][197][198][199].…”

Enhanced corrosion inhibition of carbon steel in HCl solution by a newly synthesized hydrazone derivative: Mechanism exploration from electrochemical, XPS, and computational studies

“…The values of are tabulated in Table 4. The higher negative values of the standard free energy change of adsorption approve that adsorption of inhibitor's molecules is proceeding spontaneously; they are ranging from -39.55 to -37.07 KJ mol -1 , which signifies that the adsorption of HYD (iso) occurs via a combination of physical and chemical processes [58,59].…”

Performance of Synthesized Acetone Based Inhibitor on Low Carbon Steel Corrosion in 1 M HCl Solution

“…It was found that maximum protection efficiency was 90% at 0.4 g/L of drug concentration at 333 K and 3 h exposure time. Nwanonenyi et al [16] investigated the adsorption behavior and inhibition efficiency of hydroxypropyl cellulose on aluminium corrosion in 0.5 M HCl and 2 M H2SO4. Maximum inhibitor efficiency was 84.29% in HCl and 95.92% in H2SO4 at 30 ℃ and 5 g/L inhibitor concentration.…”