摘要
铁质文物出水后进一步氧化形成的含氯的腐蚀产物主要为四方纤铁矿(β-FeOOH),为了保护铁质文物,必须去除其中的氯。为此,本研究以结晶不好的β-FeOOH和结晶完整的β-FeOOH为研究对象,分别采用去离子水和0.5mol/L NaOH溶液作为脱盐溶液,探讨碱液清洗法对β-FeOOH中氯的脱除效果,氯的脱除是否改变β-FeOOH晶型等。研究表明,0.5mol/L NaOH溶液脱除氯的效果要优于去离子水,对于结晶不好的β-FeOOH,0.5mol/L NaOH溶液能促使β-FeOOH相转化为α-FeOOH相;对于结晶完整的β-FeOOH,0.5mol/L NaOH溶液难以使β-FeOOH的晶型发生转变。该研究结果可为实际的铁质文物脱氯处理及选择适宜的脱氯时间提供一定的参考依据。
Akaganeite （ β- FeOOH） is the main corrosion product of archaeological iron artifacts after excavation. Deionized water and 0. 5 M NaOH solution were used as desalination solutions. The effects of chloride removal solu- tions on both poor - crystalized and well - crystalized β- FeOOH arediscussed. It was found that the dechloridation efficiency of 0. 5M NaOH solution is better than that of deionized water and that 0. 5 NaOH Msolution can promote the transformation of poorly - crystalized β- FeOOH to α- FeOOH ; however it is difficult to promote the transformation of well - crystalized β-FeOOH. The study provides a reference for methods and timing of dechlorindationof archaeological iron objects.
出处
《文物保护与考古科学》
北大核心
2016年第1期1-6,共6页
Sciences of Conservation and Archaeology
基金
国家科技攻关计划资助(2006BAK20B03)
关键词
铁质文物
四方纤铁矿
脱氯
Iron artifact
Akaganeite
Dechloridation
