Studying effect of plantain extract behavior as an eco-friendly corrosion inhibitor on the mild steel in 1 M HCl solution

Abstract

Purpose Corrosion inhibitors most commonly are used in the acid pickling, cleaning and etching solutions. Plant extracts as rich and cheap resources are among the eco-friendly inhibitors. This study aims to investigate the inhibition effect of plantain extract on mild steel corrosion. Design/methodology/approach The inhibition influence of plantain extract on mild steel corrosion was investigated through Tafel polarization, electrochemical impedance spectroscopy and weight loss techniques in 1 M HCl solution. Furthermore, the sample surface morphology was verified by scanning electron microscopy. Findings The inhibition effect of the plantain extract was increased with the increase in the inhibitor concentration due to its adsorption on the surface of samples. The adsorption mechanism of the plantain extract on mild steel is physical adsorption and follows Langmuir isotherm. Originality/value The results obtained from different methods showed that the plantain extract has good inhibition performance on corrosion mild steel in 1 M HCl solution as a green inhibitor.

Adsorption and Inhibition Analysis of Aconitine and Tubocurarine Alkaloids as Eco-friendly Inhibitors of Pitting Corrosion in ASTM – A47 Low Carbon Steel in HCl Acid Environment

“…The values showed that the inhibitors presented negative free energy of adsorption, indicating that the inhibitors were stable ones, and their reaction was spontaneous in the forward direction. The inhibitors also influenced the reaction to having the free energy values less negative than 20 kJ mol -1 , an indication that the reaction followed a physical adsorption mechanism [19][20][21][22][23][24][25][35][36][37][38][39]50,52], and this had been already confirmed from the data obtained for activation energy (Ea) and adsorption enthalpy (∆H).…”

“…This is due to the high-temperature effects that bring about agitation and desorption of weakly bounded inhibitor molecules held on the low carbon steel surface by van der Waals forces of attraction rather than ionic bonding [13,22,[27][28][29][30]. This can also be possible because of the migration of segments of molecules or individual molecules (inhibitors) in jumps, from one place in a site to a vacant hole of the site [17,25,31].…”

“…The values for the entropy of adsorption, as presented still in Table 6, show that the system was less disordered as values were negative. This situation will allow for the orderly and stable coverage of the inhibitors on the metal surface hence higher activation complex and advancement in the corrosion inhibition reaction [17][18][19][20][21][22][23][24][25]31,[52][53][54]. The adsorption energy values are presented in Table 6.…”

A study on anticorrosive property of phenolic components from Pachysandra terminalis against low carbon steel corrosion in acidic medium

“…Electrochemical analysis (Es’haghi et al , 2018) was performed on an electrochemical work station setup using a conventional three-electrode assemblage in a glass cell of 100-mL capacity. Low carbon steel rod implanted in thermoplastic resin with an uncovered surface area (1 cm 2 ) and platinum foil were used as the working electrode and the counter electrode, respectively.…”

Adsorption ability, stability and corrosion inhibition mechanism of phoenix dactylifera extrat on mild steel

“…Corrosion is one of the most serious problems in the iron and steel industries [1,2]. Acid solutions such as HCI and H 2 SO 4 , which are commonly used in the steel pickling, cause corrosion of metals [3,4]. Unfortunatelly, there is no method to completely eliminate the corrosion process.…”