An Exploration about the Interaction of Mild Steel with Hydrochloric Acid in the Presence ofN-(Benzo[d]thiazole-2-yl)-1-phenylethan-1-imines

Abstract

Cost effective inhibition of mild steel corrosion employing eco-friendly materials is a high priority subject for industries these days. Therefore, in this work, a series of N-(benzo­[d]­thiazole-2-yl)-1-phenylethan-1-imines [N-(benzo­[d]­thiazole-2-yl)-1-phenylethan-1-imine (BTPEI), N-(benzo­[d]­thiazole-2-yl)-1-(3-chlorophenyl) ethan-1-imine (BTCPEI), N-(benzo­[d]­thiazole-2-yl)-1-(m-tolyl) ethan-1-imine (BTTEI), and N-(benzo­[d]­thiazole-2-ylimino) ethyl) aniline (BTPIA)] for mild steel protection in 1 M HCl were explored by adopting methods like gravimetric analysis, adsorption isotherms, and electrochemical methods, for example, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. Different spectral characterization methods such as FTIR and 1H NMR were used to confirm the synthesized derivatives. The experimental results affirmed that all of the inhibitors are proven to be very efficient for combating corrosion for mild steel in acidic media. The determined thermodynamic and activation parameters were used to provide a further understanding of the mechanism of inhibitive activity. The computed Gibbs free energy values suggested strong chemical interaction of inhibitors with the mild steel surface, thereby supporting chemisorption. Potentiodynamic polarization data explained the mixed type nature of all of the inhibitors. Impedance measurements point out that protective film deposits on the mild steel in the presence of the inhibitors. Studies like scanning electron microscope (SEM) with electron dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) further supported the adsorption inhibitive mechanism. The theoretical findings such as density functional theory (DFT), Fukui indices, and molecular dynamics (MD) provided good agreement with different experimental techniques.

Azole-Based Compounds as Corrosion Inhibitors for Metallic Materials

“…In addition to lateral substituents, which contain supplementary electrondonating centers (e.g., functional groups, aromatic and azole rings), the inhibition performance of 1,3-thiazole-based derivatives is also improved by increasing their electron-donating capability via attachment with a benzene ring. In this regard, Chugh et al [103] have synthesized four new derivatives based on benzo[d]thiazole core structure (C-5, Figure 11), which exhibited an increased anti-corrosion property by replacing hydrogen atom (IE = 79%) of R substituent (on the lateral benzene ring) by chlorine atom (IE = 85%), methyl group (IE = 88%), and finally dNH 2 functional group (IE = 90%). In the same way, the combination of benzo[d]thiazole bi-rings with imidazoline ring (C-6, Figure 11) is found to act as an efficient corrosion inhibitor in the water-glycol medium [104].…”

Investigation of anticorrosive behaviour of novel tert-butyl 4-[(4-methyl phenyl) carbonyl] piperazine-1-carboxylate for carbon steel in 1M HCl

“…Because of the formation of a protective coating on the metal's surface, the inhibitor molecules prevent metal corrosion. Palm oil [ 5 ], Luffa cylindrical leaf [ 6 ], Apricot juice [ 7 ], Aloe vera gel [ 8 ], drug intermediates viz., cefuroxime [ 9 ], Cefazolin [ 10 ], hydralazine hydrochloride [ 11 ], Praziquantel [ 12 ] Schiff bases, azo dyes such as Thiadiazole-Derived Bis-Schiff Bases [ 13 ], N-(Benzo[d]thiazole-2-yl)-1-phenylethan-1-imines [ 14 ], Mono Azo Dyes derived from 4,5,6,7-Tetrahydro 1,3 benzothiazole [ 15 ], Most of the inhibitors are commercially available. Their inhibition performance has been improved at room temperature.…”

NEW ROUTE FOR THE SYNTHESES OF SOME NOVEL DERIVATIVES OF 3-ARYL BENZO[d] THIAZOLE-2(3H)-IMINE FROM HIGH SUBSTITUTED THIOUREAS

“…Benzothiazole is an organosulfur, as well as organonitrogen heterocyclic compound was a which benzene ring is fused with thiazole [4][5][6][7][8][9][10][11][12][13]. Benzothiazoles are an important class of heterocyclic compounds that act as core nucleus in various drugs such as anticancer [5,14], antileishmanial [15], antimicrobial [9,16], anti-asthmatic [11], antitumor [6], antibacterial [17,18], anti-tubercular, [19] anticonvulsant [4,20], anti-HIV [15,21], anti-inflammatory [5,7], antifungal [9,13], antiproliferative [6,14,21,22], antiviral [23], anti-Alzheimer [10,14], antimalarial [15], and antidiabetic [24][25][26] effects. The related research and developments in BTA-based medicinal chemistry have become a rapidly developing and increasingly active topic [6,19].…”