中文摘要：

采用失重法、电化学极化曲线和电化学阻抗谱研究了谷氨酸对0．5mol／L HCl溶液中铜的缓蚀作用。试验表明，谷氨酸的缓蚀效果随其浓度的增大而增大，在用量为1mmol／L时对铜的缓蚀效率可达73．7％。加入谷氨酸导致铜电极腐蚀电位负移，抑制了铜电极的阴极电化学过程。谷氨酸的缓蚀作用随溶液的pH值变化而变化，当pH值接近其等电点时缓蚀作用最小。

英文摘要：

The effect of glutamic aeid（GLU） on copper corrosion in an aerated 0. 5 mol/L HCl solution was studied by weight-loss measurements, potentiodynamic polarisation curves and electrochemical impedance spectroscopy. The inhibition efficiency （IE） increased with increasing GLU concentration and reached 73. 7% at 1 mmol/L level of GLU. Polarization studies showed that GLU rendered the negative shift of corrosion potential and suppressed the cathodic corrosion reactions.