随州博物馆藏西汉铁刀的缓蚀保护研究

Studies on Corrosion Inhibitor in the Conservation of Iron Sword from the Suizhou Museum

本文以A-3钢模拟铁刀,进行了一系列的缓蚀实验。对单宁酸、苯并三氮唑、钼酸钠、硅酸钠、磷酸钠、苯甲酸钠、六次甲基四胺、硫酸锌等进行了筛选及复配实验,采用浸泡失重法、极化曲线法、扫描电镜表征等手段评价缓蚀效果。最终筛选出钼酸钠、硅酸钠、磷酸钠三者质量浓度为1:1:1的复配缓蚀剂施用于铁刀上,并经历除锈、脱盐、缓蚀。

This paper chooses A-3 steel as a simulator for an iron sword of the Western Han Dynasty from the Suizhou Museum. A series of corrosion inhibition experiments are performed and substances as tannin, Benzotriazole （BTA）, sodium molybdate, sodium silicate, sodium phosphate, sodimn benzoate, hexamethylene tetramine （urotropine）, and zinc sulfate are selected and used in the proportioning experiments. The weight-loss immersion method, polarization curve method, and scanning electron microscope are used to evaluate the effect of corrosion inhibition experiments. Finally, the proportioning of sodium molybdate, sodium silicate, and sodium phosphate with mass concentration 1：1：1 stands out and is applied on the iron sword, after which the methods of derusting, desahing, corrosion inhibition, and surface protection are engaged to conserve the iron sword.