Aqueous extracts of Aaronsohnia pubescens subsp. pubescens aerial parts as Green Corrosion Inhibitor for Mild Steel in hydrochloric acid solution

Authors : Mounır MANSSOURI, Yassir EL OUADİ, Anas CHRAKA, Mohamed KHADDOR, Mohamed ZNİNİ, Lhou MAJİDİ

Pages : 953-968

Doi:10.18596/jotcsa.951852

View : 11 | Download : 14

Publication Date : 2021-08-31

Article Type : Research Paper

Abstract :In this study, the two aqueous extracts from the aerial parts of Aaronsohnia pubescens subsp. pubescens insert ignore into journalissuearticles values(Odorized aqueous extract insert ignore into journalissuearticles values(OE); and Deodorized aqueous extract insert ignore into journalissuearticles values(DE);); were used as some novel ecological corrosion inhibitors for mild steel insert ignore into journalissuearticles values(MS); in 1 M HCl medium. For this reason, the inhibition behavior of the OE and DE were having investigated using weight loss measurements, electrochemical assays, kinetic and thermodynamic parameters, electrochemical methods both stationary insert ignore into journalissuearticles values(Potentiodynamic polarization insert ignore into journalissuearticles values(PDP);); and transient insert ignore into journalissuearticles values(Electrochemical impedance spectroscopy insert ignore into journalissuearticles values(EIS););. The obtained results showed that EO and DE act as effective corrosion inhibitors and the inhibition efficiency of inhibitors increases for the concentration of 1.5 g/L; reaching some high values of 93.11 and 87.88 % in 1 M HCl solution at 308 K for OE and DE, respectively. Furthermore, PDP measurements exhibited that the studied of each inhibitor performs as a mixed-type inhibitor. The results of the thermodynamic kinetic parameters indicate the adsorption of OE and DE on the MS surface sites obeying the Langmuir adsorption isotherm.
Keywords : Aaronsohnia pubescens, Mild steel, corrosion