Non-toxic bisacodyl as an effective corrosion inhibitor for mild steel in 1 M HCl: Thermodynamic, electrochemical, SEM, EDX, AFM, FT-IR, DFT and molecular dynamics simulation studies

Electrochemical Behaviourof Some Amino Acids as Corrosion Inhibitors for Mild Steel in Sweet Brine

“…In Figure 12 can be appreciated the surface morphology images of the polished AISI 1018 steel sample (figure 12a); and the steel sample after 24 h of immersion in the aggressive electrolyte with 10 ppm of Phe (Figure 12b); 100 ppm of Leu (Figure 12c) and 250 ppm of Val (Figure 12d). It can be observed that the polished line of the sample can still be seen after the 24 h immersion in the presence of the three amino acids; meaning that organic molecules adsorbed in those areas forming a protecting layer and inhibiting the metal dissolution; the agglomerations seen in images are associated to corrosion products and NaCl incrustations due to the presence of Na and Cl signals in EDX images [39,40]. The cluster presence in substrate surface validates electrochemical results; since the system with…”

Experimental and computational approach of an expired antibiotic drug Kynurenic acid as an efficient corrosion inhibitor for mild steel in HNO3 medium

“…Currently, MDS is an exploratory technique which is popular toward the studies of inhibitors and metal interaction. The interaction between KYNA and iron (Fe) surface was investigated by MDS using BIOV1A material studio software [32].…”

“…In this study, we have chosen Fe (110) surface, because Fe (110) surface was well packed and most stable surface than other surfaces like Fe (111) and Fe (100) as reported in the literature [32][33][34]. The interaction between KYNA and iron (110) surface was simulated in a (24.82 × 24.82 × 40.13 A 3 ) box with a periodic boundary condition.…”

Experimental and theoretical investigations of benzoic acid derivatives as corrosion inhibitors for AISI 316 stainless steel in hydrochloric acid medium: DFT and Monte Carlo simulations on the Fe (110) surface

“…15,16 A variety of organic compounds containing heteroatoms (N, O, S) possess lone-pair electrons or heterocyclic compounds having polar groups and p electrons and lead to electron transfer to the metallic surface and consequently are used successfully to inhibit the corrosion of metal in various aggressive electrolytes through their adsorption on the metal surface. [17][18][19][20] These substances react based on their affinities to be rmly adsorbed on the surface of metals through the electron density of the functional groups as active sites on the exposed surface, thereby preventing the corrosive action in the acidic medium according to several studies. [21][22][23] In order to react across electrons density of the donor atoms or actives sites and linked to possible steric effects and electronic effects, the adsorption of the inhibitor molecule depends on the physicochemical properties.…”