Electrochemical Investigation of Corrosion on AISI 316 Stainless Steel and AISI 1010 Carbon Steel: Study of the Behaviour of Imidazole and Benzimidazole as Corrosion Inhibitors

Abstract

An electrochemical investigation of the corrosion on AISI 316 austenitic stainless steel and AISI 1010 carbon steel in sodium chloride solution (3.0 wt.%) was performed in the absence and presence of imidazole and benzimidazole corrosion inhibitors. The results showed that at any inhibitor concentration (25 ppm to 1000 ppm), there was an increase in the polarisation resistance of both steels. The highest efficiency of corrosion inhibition was obtained using imidazole at a concentration of 50 ppm for both steels, with values of 96% for the AISI 316 stainless steel and 73% for the AISI 1010 carbon steel.

Anticorrosive efficacy and adsorptive study of guar gum with mild steel in acidic medium

“…They are either synthetic or natural. However, the attractiveness and use of synthetic compounds (Guendouz et al 2013;Belfilali et al 2012;Moreira et al 2014;Ajmal et al 1994;Lagrenee et al 2002;El-Maksoud 2004;Elachouri et al 1996;Kilmartin et al 2002;Nishimura 1993;Kabanda and Ebenso 2012;Kabanda et al 2012a;Kabanda et al 2012b) as a corrosion inhibitor is losing ground because of their noxious and hazardous effects on mankind. Therefore, necessities occur to build up a different category of corrosion inhibitors with low poisonous effect, environment friendly and effective efficiency.…”

Azole-Based Compounds as Corrosion Inhibitors for Metallic Materials

“…In the last decades, benzimidazole, as well as its derivatives, has been reported as effective anticorrosion agents for many metallic materials such as mild and carbon steels [66,67]. The property of benzimidazole-based inhibitor to retard corrosion rate was attributed to the formation of an adsorbed protective film on the metal surface, which can consist of metal-benzimidazole complex or adsorbed benzimidazole molecules [68,69]. As stated for benzotriazole, numerous benzimidazole derivatives with different structural compositions have been synthesized and then used as corrosion inhibitors.…”

Recent advances in the use of benzimidazoles as corrosion inhibitors

“…Moreira et al reported that benzimidazole 1 possess best corrosion inhibition result for AISI 316 steel and AISI 1010 steel in 3% aqueous solution NaCl using inhibitor concentration of 0.1 mM, and the IE values were ~ 71% and ~ 51%, respectively [39]. Electrochemical studies have shown that in the presence of an inhibitor at concentration of 0.025 ÷ 1 mM, there was an increase of the polarisation resistance of both steels, indicating that there was an increase in corrosion resistance.…”