Surface active and thermodynamic properties of some surfactants derived from locally linear and heavy alkyl benzene in relation to corrosion inhibition efficiency

Abstract

Linear and heavy alkyl benzene (HAB) were sulfonated with fuming sulfuric acid (oleum) and the sulfonated products were esterified with tri and poly ethanolamine (d ¼ 4 and 6). The prepared three esters from each series were quaternized with n-butyl bromide. The resulted six quaternized ester of linear and HAB sulfonate were named as (L1Q, L2Q, L3Q, H1Q, H2Q, and H3Q). The surface and thermodynamic properties of these compounds have been investigated. From the data obtained, it was found that surface tension and surface active properties for the HAB derivatives were better than which obtained from linear alkyl benzene (LAB) derivatives. From the results obtained from the surface activity, the best performance compound from each group was selected to study the corrosion inhibition efficiency of them relative to the surface activity. The obtained results show that the LAB derivative L3Q exhibited inhibition efficiency (93.1%) at 1000 ppm but H3Q exhibited (97%) at 600 ppm. The diversity of the resulted data obtained was discussed in the light of chemical structure of the alkyl benzene sulfonate.

Experimental and theoretical studies of the inhibition performance of two furan derivatives on mild steel corrosion in acidic medium

“…Organic compounds with heteroatoms such as oxygen, nitrogen, sulfur and phosphorous, or compounds containing multiple bonds, are the most reported inhibitors of metal corrosion. Organic inhibitors act by their adsorption onto the metal surface, forming a protective layer, and thus decreasing the corrosion rate …”

Effect of substituents on the inhibitive properties of newly synthesized 5‐benzoyl‐4‐methyl‐1,3,4,5‐tetrahydro‐2H‐1,5‐benzodiazepin‐2‐one derivatives against mild steel corrosion in an acidic medium

“…Most usually, organic inhibitors act via adsorption on the metal surface, forming protective layers, and thus decreasing the corrosion rate. [ 7–11 ] In addition, organic inhibitors can prevent corrosion of metals by forming a metal–complex film, [ 12 ] forming a protective oxide film, [ 13 ] or a precipitate layer on the metal surface. [ 13,14 ]…”

“…Most usually, organic inhibitors act via adsorption on the metal surface, forming protective layers, and thus decreasing the corrosion rate. [7][8][9][10][11] In addition, organic inhibitors can prevent corrosion of metals by forming a metal-complex film, [12] forming a protective oxide film, [13] or a precipitate layer on the metal surface. [13,14] Many heterocyclic compounds were reported as efficient corrosion inhibitors for mild steel in acidic solutions such as oxadiazoles, triazoles, mercapto triazole, aromatic aldehydes, substituted dithiazolidines, substituted thiadiazolines, and benzimidazole derivatives.…”