Effect of SO2 on Corrosion of Silver Artifact Materials in Museum Collection
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.
quartz crystal microbalance(QCM)silverSO2temperature and humidityatmospheric corrosion
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