β-Enaminoesters as Novel Corrosion Inhibitors for Carbon Steel in Acidic Medium

Abstract

In this work, two β-enaminoesters, EN1 and EN2, were synthesized, characterized and their anticorrosion effects on American Iron and Steel Institute (AISI) 1020 carbon steel in 0.5 mol L -1 HCl were investigated using gravimetric and electrochemical methods. The results revealed that both compounds inhibit corrosion. Good correlations were observed between results obtained for gravimetric and electrochemical methods. EN1 exhibited highest efficiency of 98% after 24 h of immersion in HCl solution. The adsorption of compounds on steel surface followed the modified Langmuir adsorption isotherm. Surface morphology of carbon steel was examined using scanning electron microscopy showing that the metal surface was protected by EN1 as inhibitor of corrosion.

Evaluation of Efficiency of Avocado Seed Powder (Persea Americana) as a Corrosion Inhibitor in Sae 1008 Carbon Steel in Acidic Medium / Avaliação Da Eficiência Da Semente De Abacate Em Pó (Persea Americana) Como Inibidor De Corrosão Em Aço Carbono Sae 1008 Em Meio Ácido

“…Another aspect that deserves attention is the increase in the Rct value as the amount of powder is in the solution is increased. This is related to the hindered electronic exchange between the substrate and the electrolyte 31 . Consequently, it can be said that the absorption of molecules on the surface of the substrate can form a barrier that shelters the surface from the corrosion process.…”

Synthesis of New Phenolic-Schiff Base and Its Application as Antioxidant in Soybean Biodiesel and Corrosion Inhibitor in AISI 1020 Carbon Steel

“…23 Many compounds with anticorrosive activity have been synthesized, but they are not directly applied to biodiesel. [24][25][26][27][28] Some of these compounds are aromatic Schiff bases, which could be used as corrosion inhibitors because they contain conjugated unsaturation and heteroatoms. Soltani et al 29 synthesized two aromatic Schiff bases N,N'-bis(salicylaldehyde)benzidine (SBA) and N,N'-bis(5-nitrosalicyldiene)benzidine (SBB), to inhibit corrosion of carbon steel by acid.…”