Inhibition of N,N'-o-phenylen-bis(3-methoxysalicylidenimine) on Copper in Halide Solutions

应用恒电位稳态极化和交流阻抗技术研究了希夫碱—邻香兰素邻苯二胺 (V_oPh_V)在中性NaCl或NaBr溶液中对金属铜阳极溶解和腐蚀的缓蚀作用 .通过比较铜在空白溶液与含有V_o_Ph_V溶液中的电化学行为解释了V_o_Ph_V的缓蚀机制 .此外还研究了V_o_Ph_V自组装膜在Na Cl溶液中对铜腐蚀的缓蚀效应 .Inhibition of N,N'_o_phenylen_bis(3_methoxysalicylidenimine)(V_o_Ph_V)on corrosion and anodic disslution of copper in neutral NaCl and NaBr solutions was investigated in terms of potentiostatic steady_state polarization and A.C. impedance techniques.The inhibition mechanism of V_o_Ph_V to copper corrosion was interpreted in detail by comparing the electrochemical behaviors of copper in halide solutions with or without V_o_Ph_V. Besides,the inhibition effect of self_assembled V_o_Ph_V film on copper corrosion in NaCl was also studied.作者联系地址：山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100,山东大学化学学院!山东济南25100Author's Address: College of Chemistry,Shandong University,Jinan 250100 Chin

Corrosion Inhibition of Self-assembled Films on Iron by Electrochemical Impedance Spectroscopy

在铁表面自组装十四烷基胺膜.研究该膜在0.5 mol/LH2SO4溶液中对铁的缓蚀性能.电化学阻抗谱测试表明,随着组装时间的延长,缓蚀性能也随之增强,最大缓蚀效率为68.7%.而以十二烷基硫醇和十四烷基胺修饰的混合膜则更为致密、稳定,对铁的缓蚀能力也明显优于仅以十二烷基硫醇或十四烷基胺修饰的单一膜,其缓蚀效率可提高至78.2%.The self-assembled films of tetradecylamine were formed on iron surface,and the inhibition ability of which for iron corrosion in 0.5 mol/L H2SO4 solutions was studied by electrochemical impedance spectroscopy technique.Results indicated that longer immersion time would result in stronger inhibition ability of the films.The maximal inhibition efficiency(IE) of the tetradecylamine films was 68.7%.When the tetradecylamine films were modified by dodecylthiol,the mixed films became denser and more stable,thus the inhibition ability increased remarkably.The η of the mixed films increased to 78.2%.作者联系地址：曲阜师范大学化学科学学院;山东大学化学与化工学院;Author's Address: 1.Department of Chemistry,Qufu Normal University,Qufu 273165,Shandong,China;2.School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,Shandong,China;3.School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,Shandong,Chin

Study of Triethyl Phosphate Self-Assembled Films on Iron for Corrosion Inhibition

研究一种新型的自组装成膜物质—磷酸三乙酯(TEP).实验发现,TEP自组装膜能有效抑制铁在0.5mol.L-1硫酸溶液中的腐蚀.电化学测试显示,组装时间对成膜效果产生影响.在最初较短的组装时间内,TEP自组装膜的缓蚀效率随组装时间延长而快速增加,之后增加速率减慢直至恒定.The self-assembled film of triethyl phosphate(TEP) formed on the iron surface was found to protect iron from corrosion in 0.5 mol·L-1 H2SO4 efficiently.The inhibition effects were investigated using the electrochemical impedance spectroscopy(EIS).EIS demonstrated that the charge-transfer resistance of the electrode covered with TEP film was greater than that of the naked iron electrodes and the inhibition efficiency of TEP film increased quickly in the initial period and then increased slowly.Quantum chemical calculations provide information about the process of adsorption of molecules on the metal surface at the molecular level.作者联系地址：济南大学化学化工学院;山东大学化学与化工学院;曲阜师范大学化学科学学院;Author's Address: 1.School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,Shandong,China;2.School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,Shandong,China;3.Department of Chemistry,Qufu Normal University,Qufu 273165,Shandong,Chin