Adsorption and corrosion inhibition accomplishment for thiosemicarbazone derivatives for mild steel in 1.0 M HCl medium: Electrochemical, XPS and DFT studies

Gravimetric and electrochemical statistical optimizations for improving copper corrosion resistance in hydrochloric acid using thiosemicarbazone-linked 3-acetylpyridine

“…The Cu 2 O can be observed due to the existence of an adsorbed water film on the copper substrate which is most likely the result of the physisorption of water vapor from the surrounding air at the contact between the metal and the solution. 41 However, the solution protected with T3AP inhibitor produced peaks for Cu–S, Cu–N, and CuCl. The Cu–S and Cu–N can be observed at binding energy at 932.02 and 933.23 eV, respectively.…”

“…The interaction of Cu ions with the lone pair of S atoms in T3AP was the main reason for the adsorption of the S 2p spectrum, followed by CS (C–S) which indicated the T3AP molecules. 41,42 Meanwhile, the S–O bonds were indicated for the oxidized S atom on the copper surface. Therefore, from the findings of the XPS study, it may be inferred that the T3AP molecules and copper are reacting chemically.…”

“…The N–Cu bond results from the combination of copper and N in the T3AP molecule and the N–O bond is caused by the oxide layer on the copper strip. 41 The formation of the N–Cu bond is accomplished by transferring a lone pair electron from a nitrogen atom into an unoccupied d orbital of a copper atom. This process also leads to the production of protective coating chemical bonds on the surface of the copper atom.…”

Synthesis and Characterization of New Polymeric Ionic Liquids as Corrosion Inhibitors for Carbon Steel in a Corrosive Medium: Experimental, Spectral, and Theoretical Studies

“…The cathodic Tafel curves in Figure yield parallel lines, suggesting that the hydrogen evolution is activation-controlled, and the reduction mechanism is not affected by the presence of ILs . From the tabulated results, the change in E corr before and after the addition of ILs does not exceed 85 mV, pointing to a mixed type inhibitor . The anodic and cathodic Tafel slopes (β c and β a ) values are not affected significantly by the addition of ILs compared to those of the blank.…”

Inhibition performance of halogen-substituted benzaldehyde thiosemicarbazones as corrosion inhibitors for mild steel in hydrochloric acid solution

“…Electrochemical measurements suggested that these compounds acted as mixed-type inhibitors and the inhibition efficiencies were over 95% at proper concentrations. Zaidon 30 synthesized four benzaldehyde thiosemicarbazone derivatives and investigated their inhibition performance for mild steel in 1.0 HCl medium from both experimental and thermotical aspects. The obtained 2-(4-chlorobenzylidene)- N -phenylhydrazinecarbothioamide exhibited the greatest inhibition efficiency of 93.38%.…”