Recent Advances on the Corrosion Inhibition Behavior of Schiff base Compounds on Mild Steel in Acidic Media

Abstract

Corrosion inhibitors for mild steels subjected to aggressive media are needed by various industries, especially in power plants, petrochemical, automobile, and pharmaceutical. Accordingly, Schiff bases as a category of organic inhibitors have demonstrated efficient protecting activity in corrosive environments. This review focuses on the corrosion inhibitory performance of different Schiff bases for mild steel in acidic media and underlines the reports on which the protecting efficiency and applicability of Schiff bases have been affected by introducing different reagents as well as considering the environmental and structural issues. Therefore, discussed influential factors could endow approaches to design and apply more effective Schiff bases in the corrosion field, particularly alternatives under ecological guidelines and high inhibition efficiency.

Performance of a Composite Inhibitor on Mild Steel in NaCl Solution: Imidazoline, Sodium Molybdate, and Sodium Dodecylbenzenesulfonate

“…Prior to testing, the test solution was deaerated by passing nitrogen at a rate of 100 mL/min for 24 h. The three-electrode cell configuration consisted of the mild steel sample (working electrode); a silver/silver chloride (Ag/AgCl), which acted as the reference electrode; and platinum mesh as a counter electrode. The exposed area was 1 cm 2 . The open circuit potential (OCP) was first completed to achieve stability.…”

“…Mild steel is a crucial structural component for manufacturing equipment and pipelines due to its excellent mechanical properties, cost-effectiveness, wide availability, and high recyclability. However, mild steel is continuously exposed to corrosion during its service life in chloride-containing environments, resulting in performance degradation and significant economic losses [1][2][3]. Various corrosion inhibitors have been developed to reduce the corrosion rate of mild steel [4,5] and thereby extend the life of the equipment [6,7] in response to this problem.…”

Metal Complexes with Schiff Bases as Antimicrobials and Catalysts

“…The carbon atom of the imine bond is predisposed to nucleophilic addition, whereas the nitrogen atom holds an extremely reactive free electron pair, able to form stable complexes with metals. The catalytic activity of SBs [3], their corrosion inhibition behavior [4], as well as the action as photosensitizers [5], and fluorescent chemo-sensors tools for the detection of Cu 2+ and Fe 3+ metal ions [6] have been reported. Moreover, numerous biological activities were described in the literature for these compounds [7][8][9], such as antitumoral [10][11][12]; antimicrobial [13]; antimalarial [14]; antioxidant; neuroprotective; antidiabetic; antidepressant [15]; anti-inflammatory [16]; and acetylcholinesterase (AChE)-, butyrylcholinesterase (BChE)- [17][18][19], and carbonic anhydrase-inhibiting [20] ones.…”

The synthesis and crystal structure of (E)-2-{[(4-methoxynaphthalen-1-yl)methylidene]amino}-4-methylphenol: Hirshfeld surface analysis, DFT calculations and anticorrosion studies

“…The Schiff base is adsorbed onto the metal surface due to the presence of lone-pair electrons on the N atom in the -CH N-group and the distribution of � double-bond electrons in the structure. This adsorption behaviour leads to the formation of a very thin layer that covers the surface of the metal, thus preventing corrosion (Afshari et al, 2023;Zhang et al, 2023;Jafari et al, 2022).…”