Abstract
Gemini benzimidazole cationic surfactant, propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), referred as BIMGCS12-3, was synthesized from the raw materials of benzimidazole, dodecane bromide and dibromopropane. The structure of the target compound was confirmed by1H NMR, elemental analysis and melting point measurements. Its surface properties were determined and corrosion inhibition of carbon steel in 1M HCl was investigated by gravimetric measurements. BIMGCS12-3 exhibited excellent protection for carbon steel in the low concentration 20mg L-1and the inhibition efficiency for corrosion decreased with increment of temperature.
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