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

Abstract

In this study, two aqueous extracts from the aerial parts of Aaronsohnia pubescens subsp. pubescens (Odorized aqueous extract (OE) and Deodorized aqueous extract (DE)) were used as some novel ecological corrosion inhibitors for mild steel (MS) in 1 M HCl medium. For this reason, the inhibition behavior of the OE and DE were investigated using weight loss measurements, electrochemical assays, kinetics, and thermodynamic parameters, and electrochemical methods, both stationary (Potentiodynamic polarization (PDP)) and transient (Electrochemical impedance spectroscopy (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.

Synthesis New Triethylammonium Salts as Corrosion Inhibitors for Mild Steel in 1 MH2SO4

“…This is done to explain the interaction between the metal surface and the substance being adsorbed (B1-B3). With this point, organic molecules are moving nearby metal surface causing interfering electrons of organic molecules with the empty orbitals of metal surface atoms [27][28][29][30]. With this idea, the organic inhibitor adsorption on metal by donor atoms leads to formation kind of complexation between the metal and organic inhibitor as showing in (5,6) [31]:…”

Corrosion Inhibition of Mild Steel in HCl Solution Using MPO: Experimental and Theoretical Insights

“…In particular, organic corrosion inhibitors have gained attention for their ability to form stable adsorption layers on metal surfaces, hindering the corrosion process. This study focuses on MPO as a potential organic inhibitor for mild steel in acidic environments [21][22][23][24][25]. Prior research efforts have explored the use of different corrosion inhibitors for mild steel in acidic solutions.…”