香兰素缩3，4-二氨基苯甲酸在45#钢表面的组装工艺对其缓蚀性能的影响

Corrosion Inhibition of 3,4-Bis （4-Hydroxy-3-Methoxybenzylideneamino） Benzoic Acid for 45# Steel

合成了新型Schiff碱化合物香兰素缩3,4-二氨基苯甲酸(V-dba)。采用红外光谱对其结构进行了表征。研究了V-dba在45#钢电极表面的组装工艺,采用电化学阻抗谱(EIS)和极化曲线方法研究了V-dba自组装膜对45#钢缓蚀性能的影响。结果表明,改变组装时间和组装浓度均对Schiff碱的缓蚀效率产生影响。随着组装浓度的增大,自组装膜增大Schiff碱对钢的缓蚀效率。最佳工艺条件为:组装时间12h,组装摩尔浓度0.360mmol.L-1,缓蚀效率最高。

3, 4 Bis （4-hydroxy-3-methoxybenzylideneamino） benzoic acid （V-dba） was synthesized. Melting point test and UV-Vis spectrum, as well as FT-IR spectrum measurements were carried out to analyze the structure of the synthetic compound. The V-dba self-assembled films on steel electrode were investigated using electrochemical impedance spectroscopy （EIS） and polarization curve testing methods. Results showed that the compound was the target compound. Changing the concentrations and assembly times had an impact on the inhibition efficiency for steel corrosion. In the concentration of 0. 360 mmol· L -1 V-dba-ethanol solution, the measurements were carried out in changing the self-assembly times. When the time was up to 12 h, the corrosion inhibition efficiency reached the maximum value of 92. 0%. Under the condition of 12 h self-assembly time, tests of changing the concentration of the V-dba-ethanol solution were performed. The test results show that the corrosion inhibition efficiency increased with the increase of V-dba concentration.