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用电化学测量法研究不同组装时间、不同组装浓度和不同pH情况下谷氨酸自组装单分子膜(SAMs)对铜在0.5 mol/L HCl中的缓蚀作用,考察碘离子和谷氨酸单分子膜的协同作用,并通过量子化学计算探讨谷氨酸在铜表面的吸附机理。结果表明,谷氨酸自组装膜的缓蚀效率随组装时间和组装浓度的增加递增,最佳组装条件是在10 mmol/L组装溶液中组装12 h;在pH=10下形成的自组装单分子膜的缓蚀作用要优于其他pH下形成的自组装膜,碘离子的加入可进一步提高谷氨酸自组装膜对铜的保护效果。
The electrochemical corrosion inhibition of copper monosodium glutamate (SAMs) in 0.5 mol / L HCl at different assembly time, different assembly concentration and different pH was studied by electrochemical measurement. The effects of iodine and glutamic acid mono Molecular membrane synergies, and through quantum chemical calculations to explore glutamate adsorption mechanism on the copper surface. The results showed that the inhibition efficiency of glutamic acid self-assembled monolayers increased with the increase of assembly time and assembly concentration. The optimum conditions for assembly were as follows: assembly in 10 mmol / L assembly solution for 12 h; The corrosion inhibition of the molecular film is superior to the self-assembled film formed at other pHs. The addition of iodide can further improve the protective effect of glutamic acid self-assembled film on copper.