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    SO2对馆藏银质文物材料腐蚀的影响

    Effect of SO2 on Corrosion of Silver Artifact Materials in Museum Collection

    • 摘要: 采用石英晶体微天平(QCM)反应性监测方法,结合扫描电镜、能谱分析(SEM-EDS)和拉曼光谱表面分析技术,研究了暴露于不同SO2含量、相对湿度和温度环境中的银质文物材料的腐蚀行为及其表面特征。结果表明:随着时间延长,暴露于不同环境中的镀银石英晶振片频率均有所下降,最终趋于稳定;SO2气体会促进银的腐蚀,且腐蚀速率随其含量的增加而加快;环境温度和相对湿度的升高也会加剧SO2对银的腐蚀作用;在含SO2环境中,银表面生成了Ag2O、Ag2SO3以及Ag2SO4等腐蚀产物。

       

      Abstract: The corrosion behavior and surface characteristics of silver artifact materials exposed to environments of different SO2 concentrations, relative humidity and temperatures were investigated using a quartz crystal microbalance (QCM) reactivity monitoring method combined with scanning electron microscopy, energy dispersive spectroscopy (SEM-EDS) and Raman spectroscopy surface analysis techniques. The results show that the frequency of silver-plated quartz crystals exposed to different environments decreased and eventually stabilized with the increase of time. SO2 gas could promote the corrosion of silver, and the corrosion rate increased with the increase of its content. The increase of temperature and relative humidity also aggravated the corrosion of SO2 on silver. In the SO2-containing environment, corrosion products of Ag2O, Ag2SO3 and Ag2SO4 were formed on the silver surface.

       

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