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Synthesis and Performance of New Benzotriazole Derivatives with Long Alkyl Chain as Corrosion Inhibitors |
Xiang ZUO1,2( ),Yufeng JIANG1,Ting CHI1,Xin HU1,Dongmei CAO1,Feng CAI2 |
1. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Nanjing 210019, China 2. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China |
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Abstract A series of new corrosion inhibitors named 1-(2'-alkylsulfanylacetyl)-benzotriazole derivatives were synthesized by alkyl sulfhydryls of different lengths, sodium chloroacetate and benzotriazole. The corrosion inhibition effect of benzotriazole derivatives on copper was evaluated in 3.5%NaCl solution by means of weight loss and electrochemical testing methods, while the adsorption pattern of corrosion inhibitor molecules on the surface of copper was studied. The results show that the benzotriazole derivatives act as mixed type inhibitors with anode inhibition as dominative action. The adsorption of corrosion inhibitor molecules on copper surface obey Langmuir adsorption isotherm, including both physical and chemical adsorption. The synthesized benzotriazole derivatives possess high corrosion inhibition efficiency and excellent temperature resistance.
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