一种用于铁质文物保护的席夫碱缓蚀剂的制备及应用性能对比研究

Preparation and mixing of a Schiff base corrosion inhibitor for iron relics and comparative study of its performance

近年兴起的席夫碱缓蚀剂综合了传统缓蚀剂的优点,具有良好的缓蚀效果,但传统的溶剂法制备使用无水甲醇作为提取剂,毒性大。为此,本实验在原有的溶剂法的基础上进行了改进,改用了无水乙醇作为提取溶剂,通过溶剂法制备了一种席夫碱缓蚀剂,并对其进行复配,以协同效应大大提高其缓蚀效率。通过盐雾试验、交流阻抗、极化曲线测试等方法评价其缓蚀性能,并与文物保护常用的Fertan、钼酸盐缓蚀剂的缓蚀性能进行了对比,优选出最适用于文物保护的缓蚀剂。最终得到复配后席夫碱缓蚀剂的缓蚀效率达到92.89%,远远超过其他缓蚀剂,体现出优异的性能。

Schiff base corrosion inhibitor has a good effect of corrosion inhibition,but the traditional solvent method for its preparation uses anhydrous methanol as the extraction agent,which has high toxicity. In this study,we improved the solvent method and used anhydrous ethanol as the extraction agent instead to prepare a schiff base corrosion inhibitor. After application,its performance was evaluated by salt spray test,AC impedance and polarization curve testing methods,etc. Then its performance was compared with those of Fertan and Molybdate inhibitors,which are two commonly used inhibitors for relics. The corrosion inhibition efficiency of the final mixed Schiff base inhibitor was 92. 89%,which is far better than the other two inhibitors. Because of the outstanding performance,it is being used in the field of relic protection for the first time.