氟碳涂料在铁质文物封护中的应用研究

Study of the application of fluorocarbon coatings used for conservation of iron relics

氟碳涂层有良好的耐候性、抗腐蚀性,作为文物封护材料在我国已经得到了一些应用,然而按照工业方法直接实施封护,不能很好满足文物封护保护低光泽度、可再处理等特殊要求。为此,对氟碳涂料在铁质文物保护中的实施工艺进行了研究。研究了一系列氟碳涂层的封护性能,测试了涂层的机械性能、防腐性能、耐候性能和热性能,使用红外光谱对暴晒前后的涂层进行了分析,结果表明:在氟碳涂料中添加纳米二氧化硅和采用复合涂层可以有效的保护室外铁质文物,二氧化硅的加入提高了涂层的热稳定性。

Fluorocarbon coatings have good resistance to weathering and corrosion and have been used as a coating material for relics in China. However, direct coating following industrial procedures can not meet special conservation requirements, such as low gloss and reversibility. Therefore, a series of fluorocarbon coating materials have been tested for conservation of iron relics. Their mechanical and anti - corrosion properties, thermal stability and resistance to weathering have been tested. The results showed that using aprimer coating and adding SiOinano - particles are effective in protecting outdoor iron relics. This conclusion was verified by observation of the appearance of the object and FT - IR spectrum analysis of samples before and after exposure tests. The thermal stability of the fluorocarbon coating can be increased by adding nano - SiO2 particles.