Adsorption Properties and Inhibition of Carbon Steel Corrosion in a Hydrochloric Solution by 2-(4,5-diphenyl-4,5-dihydro-1h-imidazol-2-yl)-5-methoxyphenol

Abstract

The corrosion inhibition of mild steel in a 1.0 M hydrochloric acid solution by 2-(4,5-diphenyl-4,5-dihydro-1h-imidazol-2-yl)-5-methoxyphenol (P1) has been studied in relation to the concentration of the inhibitor, as well as to the temperature, using chemical (weight loss) and electrochemical techniques. All the employed methods were in reasonable agreement. The protection efficiency increased with an increased inhibitor's concentration. The obtained thermodynamic adsorption parameters (∆G * ads, ∆H * ads, ∆S * ads) indicated that this polymer retarded both cathodic and anodic processes through physical adsorption, and blocked the active corrosion sites. It was also found that this compound obeyed the Langmuir's adsorption isotherm.

Quantum chemical and experimental evaluation of the inhibitory action of two imidazole derivatives on mild steel corrosion in sulphuric acid medium

“…When two of these featuresare combined, increased inhibition can be observed [Moradi and Attar, 2014; Shivakumar and Mohana, 2012; Galai et al., 2017]. Recently many researchers have reoriented their attention to the useof new organic compounds as corrosion inhibitors such aspyrazole [Hammouti et al., 1995; Aouniti et al., 1998; El-Ouafi et al., 2002], triazole [Salghi et al., 2000; Bentiss et al., 1999], Triazepine Carboxylate [Alaoui et al., 2018], tetrazole [Kertit and Hammouti, 1996; Kertit et al., 1998], imidazopyridine [Ech-chihbi et al., 2016; Ech-chihbi et al., 2017] and imidazole [Galai et al., 2016; Rbaa et al., 2017a, Rbaa et al., 2017b]. Recently, imidazole has attracted a lot of attention in the field of metallic corrosion inhibition due to their interesting properties, low cost and their ease of synthesis [Verma et al., 2018].…”

Synthesis and characterization of new quinoxaline d erivatives of 8- hydroxyquinoline as corrosion inhibitors for mild s teel in 1.0 M HCl medium

“…Their selection depends on the type of acid, its concentration, the temperature and the metal material exposed to the action of the [7] acid solution. The injection of organic inhibitors to the aggressive medium has been proven to be an effective and practical way to reduce the corrosion process on metal [8][9][10][11][12][13][14]. Some heterocyclic compounds were found to be good corrosion inhibitors in deferent environments.…”

Inhibition of copper corrosion by the essential oil of Allium sativum in 0.5M H2SO4 solutions

“…5a). The activation energy of the corrosion process Ea can be calculated using the following equation [61,62]:…”