Efficacy of zinc salts to protect glass against atmospheric alteration. Part I: Effects of a spraying treatment,Journal of the American Ceramic Society

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Efficacy of zinc salts to protect glass against atmospheric alteration. Part I: Effects of a spraying treatment
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2020-11-25 , DOI: 10.1111/jace.17590
Fanny Alloteau _{1,

2} , Odile Majérus ₂ , Valentina Valbi _{1,

2} , Isabelle Biron ₁ , Patrice Lehuédé ₁ , Daniel Caurant ₂ , Grégory Lefèvre ₂ , Antoine Seyeux ₂

Affiliation

Following an industrial process to protect manufactured glass windows against atmospheric corrosion during their storage and transport, this research is focused on the possibility that a surface deposit of a small amount of zinc salts may efficiently reduce the atmospheric alteration kinetics of ancient glasses (soda, potash, and mixed alkali silicates). To this end, the chemical action of zinc salts was investigated by means of aging experiments (with temperature and relative humidity (RH) control) on three glass models, of which compositions are representative of the cultural heritage. When the treatment was performed on pristine glass (about 1 μg/cm² of deposited Zn²⁺ ions), treated glass plates developed a significantly thinner hydrated layer than the untreated ones at 80°C or at 40°C (85 RH%). The formation of alkali and Ca‐carbonates salts on the surface was also considerably reduced. The state of the glass surface undergoing the Zn treatment and the temperature of the treatment seem critical regarding the efficacy of the protection.

中文翻译：

锌盐的功效，可保护玻璃免受大气变化的影响。第一部分：喷涂处理的效果

为了保护人造玻璃窗在储存和运输过程中免受大气腐蚀的工业过程，这项研究的重点是以下可能性：少量锌盐的表面沉积物可能有效地降低古代玻璃（苏打水，钾盐）的大气变化动力学。，以及混合的碱金属硅酸盐）。为此，通过在三个玻璃模型上的时效实验（通过控制温度和相对湿度（RH））研究了锌盐的化学作用，其组成代表了文化遗产。在原始玻璃上进行处理时（沉积的Zn ²⁺约1μg/ cm ²离子），在80°C或40°C（85 RH％）的条件下，经过处理的玻璃板形成的水合层明显比未经处理的薄。表面上碱金属盐和碳酸钙盐的形成也大大减少了。就保护效果而言，经过锌处理的玻璃表面状态和处理温度似乎至关重要。

更新日期：2020-11-25

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