Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (01): 74-78.doi: 10.3866/PKU.WHXB20020117

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Synergistic Effects of Benzotriazole and 8-Hydroxyquinoline Combined Inhibitorson Copper Corrosion

Zhang Da-Quan;Gao Li-Xing;Zhou Guo-Ding;Lu Zhu   

  1. Electrochemical Research Group,Shanghai University of Electric Power,Shanghai 200090;Corrosion Prevention Center, East China University of Science and Technology, Shanghai 200137
  • Received:2001-06-22 Revised:2001-09-10 Published:2002-01-15
  • Contact: Zhang Da-Quan

Abstract: The efficiency of benzotriazole(BTA) and 8hydroxyquinoline(HQ) as corrosion inhibitors for copper was investigated in 3% NaCl solution. Potentiodynamic polarization and a.c impedance spectroscopy were applied to study the corrosion behavior in presence of inhibitors and their complex. A synergistic effect of BTA and HQ combined inhibitors on copper corrosion was observed. The molecular structure parameters of BTA and HQ were obtained via MM2 forcefield program and PPPSCF quantum chemical calculation. The synergistic effect was attributed to the formation of a more compact protective layer.

Key words: Benzotriazole, 8-hydroxyquinoline, Synergistic effect, AC impedance spectroscopy, PPP-SCF calculation