Mild steel corrosion inhibition in 200 ppm NaCl by new surfactant derivatives of bis-glucobenzimidazolones

Arabian Journal of Chemistry

Mohamed Massoui¹  El Mokhtar Essassi¹  Rachid Touir²  Mohamed Ebn Touhami²  Brahim Lakhrissi³  Loubna Lakhrissi³ 

[1] Laboratoire de Chimie Organique Hétérocyclique, Université Mohammed V – Agdal, Faculté des Sciences, Rabat, Morocco;Laboratoire de Matériaux, Electrochimie et Environnement, Faculté des Sciences, Université Ibn Tofail, BP 133, Kénitra 14000, Morocco;Laboratoire d’Agroressources et Génie des Procédés, Faculté des Sciences, Université Ibn Tofail, BP 133, Kénitra 14000, Morocco;

关键词: Bis-glucobenzimidazolone derivatives;    Syntheses and characterization;    Corrosion inhibition;    200 ppm NaCl;    Mild steel;    Electrochemical measurements;   

DOI  :  10.1016/j.arabjc.2013.12.005

来源: DOAJ

【 摘 要 】

The new bis-glucobenzimidazolone derivatives (24a–d) have been synthesized and characterized by NMR spectroscopy. They have been tested as corrosion inhibitor for mild steel in 200 ppm NaCl solution using potentiodynamic polarization curves and electrochemical impedance spectroscopy. Potentiodynamic polarization curve measurements showed that the investigated compounds were a mixed-type inhibitor. Their inhibition efficiencies improve with concentration and reached a maximum at 10−5 M of each compound and the 24b is better. Electrochemical impedance spectroscopy measurements showed that the diagrams composed of two depressed capacitive loops. This loop can be split into two capacities’ contributions, although badly separated. The first loop is attributed to the formation of a protective layer and the second is attributed to the charge transfer resistance.

【 授权许可】

Unknown