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

Abstract

<em><span style="font-size: 10.0pt; line-height: 120%; letter-spacing: -.4pt; mso-bidi-language: FA;">α</span></em><em><span style="font-size: 10.0pt; line-height: 120%; mso-fareast-font-family: 한컴바탕; letter-spacing: -.4pt; mso-bidi-font-weight: bold;">, ω-alkane-bis(N-myristoyloxyethyl-N, N-dimethyl)-diammonium bromide were synthesized</span></em><em><span style="font-size: 10.0pt; line-height: 120%; mso-fareast-font-family: 한컴바탕; mso-bidi-font-weight: bold;"> 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^-4</span></em><em><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Cambria Math','serif'; mso-bidi-font-family: 'Cambria Math'; mso-bidi-font-weight: bold;">∼</span></em><em><span style="font-size: 10.0pt; line-height: 120%; mso-fareast-font-family: 한컴바탕; mso-bidi-font-weight: bold;">3.05×10^-4 mol/L. The Krafft points were measured at 39.1 ~ 43.2</span></em><em><span style="font-size: 10.0pt; line-height: 120%; font-family: 'Cambria Math','serif'; mso-bidi-font-family: 'Cambria Math'; mso-bidi-font-weight: bold;">℃</span></em><em><span style="font-size: 10.0pt; line-height: 120%; mso-fareast-font-family: 한컴바탕; mso-bidi-font-weight: bold;">. 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.</span></em>