关于青铜文物深层有害锈形成与转化的分析研究

为了长久保存馆藏青铜文物,有效转化深层有害锈氯化亚铜,以仿古青铜试样为对象,应用循环伏安法、恒电位极化法等电化学实验来研究青铜在模拟中性土壤介质溶液中的电化学行为,应用X-射线衍射(XRD)、共聚焦激光Raman显微分析检测其腐蚀产物的主要物相。结果表明,氧化过程是生成有害锈氯化亚铜的反应,还原过程是氯化亚铜还原成铜的反应。运用扫描电子显微镜和能谱仪(SEM-EDS)进行形貌观察和微区腐蚀产物成分分析。对氯化亚铜在不同湿度环境下的变化进行了跟踪观察。由此,为除去青铜文物深层有害锈氯化亚铜所做的一系列探讨将在博物馆藏品保护方面具有一定应用价值。

Research on the formation and the mechanism of transformation inharmful, deeply rusted bronze relics

In order to preserve deeply rusted bronze cultural relics collection effectively in the long term, cuprous chloride needs to be transformed or removed. Using reproductions of antique bronzes as research objects, cycle electrochemical experiments technique, for example, the Cycle voltammetry (CV), potentiostatic polarization, etc., were used to study the electrochemical behavior of bronze in an electrolyte that simulates moist soil. X-ray diffraction (XRD) and micro confocal laser Raman spectroscopy were used to analyze the corrosion products. The results show that the oxidation process involves the formation of CuCl, which can be reduced back to pure Cu. The morphology of the corrosion and its product was analyzed using scanning electron microscopy and energy dispersive spectroscopy (SEMEDS). The changes in the cuprous chloride at different humidity levels were observed. Discussion of the removal of deeply harmful cuprous chloride rust from bronze relics will be of value in the conservation of bronze objects in museum collections.