Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl

Abstract

Octylamine-functionalized graphene oxide chemisorbed onto a Mg alloy surface by non-bonding electron.

Synthesis and characterization of novel dicarbohydrazide derivatives with electrochemical and theoretical approaches as potential corrosion inhibitors for N80 steel in a 3.5% NaCl solution

“…The smaller values of electronegativity ( χ ) for H 2 MEH suggested the stronger ability of H 2 MEH than H 2 HEH to provide electrons to the metal. 90 The stability and reactivity of a compound could also be used to evaluate its hardness ( η ) and softness ( σ ). Soft compounds are highly reactive than hard compounds and they effortlessly provide electrons to an N80 sample during the adsorption.…”

Preparation, Characterization, and Evaluation of Macrocrystalline and Nanocrystalline Cellulose as Potential Corrosion Inhibitors for SS316 Alloy during Acid Pickling Process: Experimental and Computational Methods

“…As evidenced in Table 4 , NCC has a smaller Δ E value (5.78 eV) than CEL (5.83 eV), which supports a higher trend of NCC to be adsorbed on the SS316 alloy surface. Furthermore, the little values of electronegativity (χ) also offer a large potential reactivity of the inhibitor molecules to afford electrons to the metal surface, so NCC has a lower value of χ (2.56) than CEL (2.82), indicating the high adsorption for NCC [ 54 ]. Additionally, the stability and reactivity of the molecule can measure from hardness (η) and softness (σ), i.e., soft molecules have more protecting ability than hard molecules by virtue of the smooth delivery of electrons to the metal surface through adsorption; therefore, they are considered effective corrosion inhibitors [ 55 ].…”

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

“…As demonstrated in Table 3, CH/Zn@H 3 BTC had a lower ∆E value (0.55 eV) than CH (5.80 eV), which indicates the greater tendency of CH/Zn@H 3 BTC to be adsorbed on steel's exterior. Most common inhibitors demonstrate relatively low electronegativity (χ) values, indicating their ability to offer electrons to a metal surface [61]. In contrast, high electronegativity (χ) values indicate the strong ability of the inhibitor molecule to attract and take electrons from metal surface atoms (i.e., back-donation) and form a stronger bond with metal atoms [62].…”