Effect of Corrosion Resistance of Benzotriazole and its Derivatives on the Surface of Copper Alloy
N-alkyl benzotriazole(BTA)was synthesized from benzotriazole(BTA)and bromo-alkyl,which was prepared into solution in solvent anhydrous ethanol.The film was prepared on the surface of copper alloy by self-assembly method to achieve slow release effect.The effect of concentration and assembly time of benzotriazole and its derivatives on corrosion resistance of copper alloy surface in 3.5%NaCl solution was studied by electrochemical testing and contact Angle characterization.The results show that when the concentration of each assembly solution is 50 mmol/L and the assembly time is 24 h,the impedance value and corrosion inhibition efficiency reach the maximum value,in which the corrosion inhibition efficiency reaches 79.97%,and the contact angle reaches the maximum value of 116°.It was found that the longer the substituted alkyl chain on benzotriazolimide,the better the corrosion resistance and hydrophobicity of the copper alloy surface.
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