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博物馆环境中的臭氧作为最为典型的氧化性气态分子污染物,对文物起到氧化腐蚀的作用,严重影响馆藏银器文物的腐蚀变色。本文主要采用石英晶体微天平(QCM)反应性监测技术,监测电沉积金属银石英晶振片在不同臭氧浓度,不同温、湿度等条件下的质量变化,结合电化学腐蚀过程和银表面腐蚀产物分析,从而推测银在臭氧中的初期腐蚀行为。研究结果表明,随着臭氧浓度的增大,温度的升高都会导致金属银文物材料腐蚀速度的增大,暴露时间的延长会加重金属银文物的腐蚀,但对其腐蚀速度影响较小。金属银在臭氧环境中暴露后的初期腐蚀产物主要为Ag_2O。
Ozone in the museum environment, as the most typical oxidative gaseous molecular pollutant, acts as an oxidative corrosion on cultural relics and seriously affects the corrosion and discoloration of the collected silver artifacts. In this paper, the quartz crystal microbalance (QCM) reactivity monitoring technology is mainly used to monitor the quality change of the electrodeposited metal-silica quartz crystal under different ozone concentrations, different temperature and humidity conditions. Combined with the electrochemical corrosion process and silver surface corrosion product analysis , To speculate silver in the initial corrosion of ozone behavior. The results show that with the increase of ozone concentration, the increase of temperature will lead to the increase of corrosion rate of metallic silver artifacts, and the extension of exposure time will aggravate the corrosion of metallic silver artifacts, but have little effect on the corrosion rate. The initial corrosion products of metallic silver after being exposed in the ozone environment are mainly Ag2O.