Effect of substitution and temperature on the corrosion inhibition properties of benzimidazole bearing 1, 3, 4-oxadiazoles for mild steel in sulphuric acid: Physicochemical and theoretical studies

Inhibition Mechanism of Some Vinylalkylimidazolium-Based Polymeric Ionic Liquids against Acid Corrosion of API 5L X60 Steel: Electrochemical and Surface Studies

“…The R ct values grew with the increasing C INH , indicating that the PIL molecules are adsorbed on the steel surface, promoting a resistive effect that diminished the charge transfer. In contrast, the C dl values diminished with C INH , which was attributed to the decrease of the local dielectric constant of the solution and/or to the thickness increase of the electric double layer due to the displacement of water molecules and corrosive ions adsorbed on the metal surface by CI molecules. ,, …”

“…In contrast, the C dl values diminished with C INH , which was attributed to the decrease of the local dielectric constant of the solution and/or to the thickness increase of the electric double layer due to the displacement of water molecules and corrosive ions adsorbed on the metal surface by CI molecules. 36 , 50 , 51 …”

“…In contrast, the C dl values diminished with C INH , which was attributed to the decrease of the local dielectric constant of the solution and/or to the thickness increase of the electric double layer due to the displacement of water molecules and corrosive ions adsorbed on the metal surface by CI molecules. 36,50,51 The constant phase elements (CPEs) in an EEC are employed to represent the nonideal capacitances of the EIS spectra as observed in the depreciated circles (Figure 4). The impedance of a CPE (Z CPE ) can be calculated from two parameters: the proportional factor Y 0 and the exponent n. The latter is associated with the surface irregularities produced by roughness, inhibitor adsorption, or the formation of porous layers.…”

Temperature Effect on the Corrosion Inhibition of Carbon Steel by Polymeric Ionic Liquids in Acid Medium

“…The negative values of Δ G° ads express that the adsorption was thermodynamically spontaneous [ 9 ]. The values of Δ G° ads are associated with the type of adsorption that occurred in a metal-liquid system [ 58 , 59 , 60 ]: when Δ G° ads > −20 kJmol −1 , physical adsorption or physisorption took place, which is characterized by the electrostatic interaction between the charge of the CI molecules and the charge of the metallic surface; when Δ G° ads < −40 kJmol −1 , the behavior indicates that the CI molecules and metallic surface share or transfer their charge in such a way that a coordinate metallic bond is formed, having chemical adsorption or chemisorption. When Δ G° ads displays intermediate values between −20 and −40 kJmol −1 , it is considered that the CI undergoes an adsorption process that is both physical and chemical.…”

Recent advances on oxadiazole motifs: Synthesis, reactions and biological activities

“…Corrosion is a momentous challenge plaguing industrial activity. 1,3,4-Oxadiazole derivatives (3a-c) were synthesized and were reported to exhibit notable corrosion inhibition in mild steel in acidic medium (0.5 M H2SO4) 19 . Similarly, 20 oxadiazole derivative (4) mitigated corrosion of carbon steel in 1M HCl as the acidic medium.…”