Corrosion Inhibition Effect of Ester Containing Cationic Gemini Surfactants on Low Carbon Steel

Document Type: Research Note

Authors

Department of Engineering Chemistry, Chungbuk National University Cheongju 362-763, Republic of KOREA

Abstract

α, ω-alkane-bis(N-myristoyloxyethyl-N, N-dimethyl)-diammonium bromide were synthesized and confirmed by FT-IR, FT-Raman and 1H-NMR spectroscopy. Surface tensions were measured by sigma 70 and conductivity meter EC-470C. Critical micelle concentration values were 2.70×10-43.05×10-4 mol/L. The Krafft points were measured at 39.1 ~ 43.2. Their inhibition effects on the corrosion of low carbon steel were tested by the weight loss method in hydrochloric acid. The corrosion inhibition capacity of synthesized cationic gemini surfactant was 24.8% at 1 X 10-7mol/L concentration. Corrosion inhibition efficiency has increased by 93.8% after the concentration was increased to 1 X 10-4mol/L. As a result, these surfactants are expected to be applied as corrosion inhibitors.

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