Investigation of Benzothiazole Derivatives as Corrosion Inhibitors for Mild Steel

Abstract

The influence of benzothiazole derivatives on corrosion inhibition of mild steel in 1 M H 2 SO 4 was studied by weight loss, potentiodynamic polarization and AC-impedance techniques. The synergistic effect by the addition of halide ions had been studied. The experimental results showed that the inhibition efficiency increases with increasing inhibitor concentration, but decreases with increasing temperature; potentiodynamic polarization curves showed that benzothiazole derivatives acted as cathodic inhibitors in 1 M H 2 SO 4 . This was supported by the impedance measurements which showed a change in the charge transfer resistance and double layer capacitance, indicating adsorption of Benzothiazole derivatives on the mild steel surface. Atomic absorption spectroscopy studies showed that the inhibition efficiency increases with increasing inhibitor concentration.

Effect of benzamide on the corrosion inhibition of mild steel in sulphuric acid

“…The significance of this metal protection process in diverse areas of applications has necessitated the keen interest in research in corrosion chemical inhibition by various corrosion scientists among others. [1][2][3][4][5] In this work, benzamide ( Fig. 1) was used as the corrosion chemical inhibitor for mild steel in sulphuric acid.…”

Tunable Anticorrosive Effects of Newly Synthesized Benzothiazole Azo Dyes by Potassium Iodide Synergism for Carbon Steel in 1 M HCl: Combined Experimental and Theoretical Studies

“…In recent years, organic compounds have been used extensively as corrosion inhibitors to prevent corrosion in metals. , Generally, the most effective organic inhibitors are heterocyclic compounds having π-electrons, heteroatoms, and aromatic rings. Heterocyclic azo dyes and Schiff bases have attracted attention as metal corrosion inhibitors in acidic conditions because they have higher inhibition efficiency (IE) than the comparable amines and aldehydes. − Comparatively to other organic inhibitors, azo dyes are more promising for the suppression of corrosion due to their molecular structures. According to several research studies, − the inhibition of corrosion by azo dyes is attributed to the formation of complexes between the metal and the nitrogen of the azo group binding at the electrode surface.…”

Experimental and theoretical investigation on the anti-corrosion characteristics of pyridine-substituted benzothiazole derivatives for mild steel in aqueous HCl

“…There are many reports on 2-substituted BT derivatives as corrosion inhibitors, like 2-amino BT, 2mercapto BT and others. 24,25 Some researchers have reported anti-corrosive performance of 6-substituted 2-amino BT derivatives. [26][27][28] More structurally complicated 2-substituted BT derivatives, prepared through multistep synthesis, or BT derivatives substituted at both 2 and 6-positions have also been reported in order to obtain better inhibition efficiency.…”