Experimental and theoretical investigations of four amine derivatives as effective corrosion inhibitors for mild steel in HCl medium

Abstract

Four amine derivative compounds were synthesized and used as organic corrosion inhibitors.

Green inhibitor of carbon steel corrosion in 1 M hydrochloric acid:Eruca sativaseed extract (experimental and theoretical studies)

“…22 , comparable behavior was found in terms of total negative charge (TNC), with the TNC increasing after the inhibitor was protonated. 148 This shows that protonated particles' structural interaction is rising. According to TNC, phenolic compounds have a greater electron donor property than the other chemicals.…”

Review on the Recent Development of Fatty Hydrazide as Corrosion Inhibitor in Acidic Medium: Experimental and Theoretical Approaches

“…The adsorption of organic corrosion inhibitors can occur in the form of physical, chemical, or mixed type depending on the nature of organic molecules, metal surface, the chemical composition of corrosive medium, and the solution temperature [19]. In fact, the efficiency of organic inhibitors largely depends on the nature of the medium, metal surface state, and the structure of inhibitors [20]. Some factors contribute to the action of organic inhibitors, including the chain length, size of the molecule, bonding, aromatic/conjugate, strength of bonding to the substrate, cross-linking ability, and solubility in the environment [15].…”

“…The electronic properties can elucidate the adsorption and corrosion inhibition behavior of an inhibitor molecule. The parameters studied in DFT calculation explaining the inhibitor efficiency are the highest occupied molecular orbital energy (E HOMO ), lowest unoccupied molecular orbital energy (E LUMO ), energy gap (∆E), dipole moment (µ), number of transferred electron (∆N), electronegativity (χ), softness (σ), ionization potential (I), and electron affinity (A) [20]. The adsorption of an inhibitor on a metal surface is based on the interaction between the heteroatom electrons and the π-electrons with the metal atoms d-orbital vacancies [57].…”

Quantum Chemical Analysis of the Corrosion Inhibition Potential by Aliphatic Amines

“…Moreover, due to economic considerations, theoretical methods found a special place in the study of the anti-corrosion properties of organic compounds including amine compounds. Boughoues et al [ 30 ] theoretically analyzed the anticorrosive properties of four derivatives of amine compounds using DFT and MD methods and determined their mechanism of inhibition, finding direct correlations with the results obtained using electrochemical methods. The experimental work carried out by Shihab and Al-Doori confirmed the physisorption effect of organic compounds during corrosion protection, and the theoretical models developed provided useful information to explain the interaction between the metal surface and selected inhibitors at the atomic level [ 31 ].…”