• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2019, Volume: 12, Issue: 15, Pages: 1-8

Original Article

Effect of 1 H-Benzimidazole Derivatives on Zinc by Treatments with Sodium Phosphate and Silicate in 0.5 M NaCl solution


Objectives: In this study, the inhibitory effect of 1H-benzimidazole, 2-methyl-1H-benzimidazole and 5-nitrobenzimidazole on zinc have been investigated. Method: For this purpose, we used current-potential and Electrochemical Impedance Spectroscopy (EIS) methods in 0.5M NaCl solution at 25°C. Zinc polished with sand paper, etched 20 minute in 0.15 M HCl solution, cleaned with distilled water immersed for pre-treatment with sodium hydrogen phosphate (Na2 HPO4 .12H2O, pH 5.7) and sodium silicate (Na2SiO2 ) solution. Findings: Pre-treated coatings on the zinc increased inhibition effects of BIM derivatives. Inhibition efficiency was approximately 98%, for 1H-benzimidazole and 5-nitrobenzimidazole. 

Keywords: Coatings, Corrosion, Organic Inhibitors, Phosphate, Silicate


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