Study on synthesis and corrosion inhibition of ester succinate-containing cationic Gemini surfactants

Bis(2-dimethylaminoethyl) succinate was prepared with 91.2% yield(based on dimethyl succinate) by reacting dimethyl succinate with dimethylaminoethanol in the presence of sodium methoxide.Two kinds of novel ester succinate-containing cationic Gemini surfactants,n-CnH2n+1(CH3)2N+CH2CH2-OCOCH2CH2COOCH2CH2N+(CH3)2CnH2n+1-n 2Br(n=12 or 16) were synthesized with 85% yield [based on bis(2-dimethylaminoethyl) succinate]by reacting bis(2-dimethyaninoethyl) succinate with two kinds of alkyl bromides.The corrosion inhibition in 1M HCl was studied.It was founded that the corrosion inhibition efficiency of the two Gemini surfactants were respectively 97.27% and 98.10% at 1×10-3mol·L-1.