通过Mannich反应把苯并三唑（BTA）和咪唑（IM）分子用亚甲基链接起来，合成1-[（1‘-咪唑）-甲基]苯并三唑（IMBTA）化合物。采用静态挂片法、电化学极化曲线法和电化学阻抗法研究了它对3%NaCl 溶液中铜的缓蚀作用，讨论了分子内苯并三唑单元和咪唑单元的协同缓蚀作用。
1-[(1'-imidazolly)-methy] benzotriazole(IMBTA) was synthesized by Mannich reaction.Its inhibition effects for copper corrosion in 3% NaCl solution was investigated by weight-loss measurement,electrochemical polarization curves and electrochemical impedance spectra.IMBTA(0.001mol/L)exhibited better protection compared with the mixture of 0.001mol/L benzotriazole (BTA)and 0.001mol/ L inidazole (IM)under the same experimental conditions.Polarization studies showed that IMBTS supressed both cathodic and anodic corrosion reactions.The synergistic effect of BTA moiety and IM moiety in IMBTA molecule was observed.The electron transfer from IM moiety to BTA moiety was conductive to the adsorption of BTA moiety on copper surface.This resulted in improvement of the protective ability of IMBTA for copper in 3% NaCl solution
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