Evaluation of corrosivity of indoor museum atmospheres using lead specimens

J. Švadlena, K. C. Strachotová, T. Prošek, M. Kouřil
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Abstract

The corrosivity of indoor atmospheres is usually evaluated according to the ISO 11844-1 standard, utilizing specimens of different metals. However, the sensitivity of this setup is not sufficient to the presence of specific organic pollutants, such as acetic and formic acid or formaldehyde. In this study, lead metal specimens were added as complementary specimens in the series of exposures including various museums and cultural sites. Temperature and relative humidity were monitored and adsorbent tubes were deployed for estimation of the content of the organic compound. For comparison and verification, lead specimens were exposed in laboratory conditions with controlled levels of acetic acid, which is supposed to be the main cause of the increase in lead corrosion rates. The results show that the use of lead specimens can provide valuable data about the corrosivity of the atmosphere due to its sensitivity to the presence of the carboxylic acids. This can be particularly important information for indoor storage conditions in museums and depositories. However, a proper method to evaluate the lead corrosion rates is necessary.
用铅试样评价博物馆室内空气的腐蚀性
室内空气的腐蚀性通常根据ISO 11844-1标准进行评估,使用不同金属的样品。然而,这种装置的灵敏度不足以满足特定有机污染物的存在,如乙酸和甲酸或甲醛。在本研究中,铅金属标本作为补充标本加入了包括各种博物馆和文化遗址在内的一系列暴露中。监测了温度和相对湿度,并部署了吸附管来估计有机化合物的含量。为了进行比较和验证,铅样品暴露在控制乙酸水平的实验室条件下,这被认为是铅腐蚀率增加的主要原因。结果表明,由于铅对羧酸的存在很敏感,因此铅试样的使用可以提供有关大气腐蚀性的有价值的数据。这对于博物馆和仓库的室内储存条件来说是特别重要的信息。然而,有必要采用适当的方法来评估铅的腐蚀速率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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