臭氧气氛下LED灯光对银质文物模拟材料腐蚀变色的影响

发布时间：2018-05-03 08:47

本文选题：银 + 文物　；参考：《表面技术》2017年03期

【摘要】：目的研究臭氧与LED灯光共同作用于银质文物模拟材料的腐蚀行为和规律。方法采用石英晶体微天平(QCM)反应性监测及SEM-EDS等方法,研究了暴露于臭氧和LED灯下的银质文物模拟材料的腐蚀行为及其表面特征。结果暴露于LED灯或臭氧条件下的石英晶振片频率均有所下降,而暴露于LED灯加臭氧复合条件下的石英晶振片频率下降速率更快且最终下降值更多。此外,升高LED灯色温、增大臭氧浓度或提高环境温度,均会使石英晶振片频率下降速率更快且最终下降值更大。在臭氧质量浓度为5μg/L环境中,与无光照条件相比,LED光照下的银片表面的腐蚀产物及氧元素含量较多,并且LED灯的色温越高,其光照下的银片表面生成的腐蚀产物越多,但不同品牌的LED灯下的银片表面腐蚀产物生成量及氧元素含量均相近。结论臭氧与LED灯光均会加速银的腐蚀,两者共同作用时,会使银腐蚀更严重。升高LED灯色温、增加臭氧浓度或提升环境温度也同样会加速银的腐蚀,但不同品牌LED灯对银腐蚀的影响却相差无几。
[Abstract]:Objective to study the corrosion behavior of silver antiquities by ozone and LED lighting. Methods Quartz crystal microbalance (QCM) reactivity monitoring and SEM-EDS were used to study the corrosion behavior and surface characteristics of silver antiquities simulated materials exposed to ozone and LED lamps. Results the frequency of quartz wafer exposed to LED lamp or ozone decreased, but the frequency of quartz wafer exposed to LED lamp combined with ozone decreased more quickly and finally dropped more. In addition, increasing the color temperature of LED lamp, increasing the ozone concentration or increasing the ambient temperature will make the frequency drop rate of quartz wafer faster and the final drop value larger. In a 5 渭 g / L ozone concentration environment, the surface corrosion products and oxygen elements on the silver wafer exposed to LED were more than those without illumination, and the higher the color temperature of LED lamp was, the more corrosion products were generated on the silver sheet surface under illumination. However, the amount of surface corrosion products and the content of oxygen elements under different brands of LED lamp are similar. Conclusion both ozone and LED light can accelerate the corrosion of silver. Increasing the color temperature of LED lamp, increasing the concentration of ozone or increasing the ambient temperature will also accelerate the corrosion of silver, but the influence of different brands of LED lamp on silver corrosion is similar.
【作者单位】：华东理工大学;上海博物馆;
【基金】：国家自然科学基金项目(51671117) 上海市科委科研计划重点支撑项目(13231203000)~~
【分类号】：TG172.1

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