Effect of marine aerosols on the alteration of silicate glasses
Effect of marine aerosols on the alteration of silicate glasses
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DOI：
10.1016/j.jnoncrysol.2017.06.013
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发表时间：
2017-09
影响因子：
3.5
通讯作者：
T. Palomar;A. Chabas;D. Bastidas;D. Fuente;A. Verney-Carron
中科院分区：
文献类型：
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作者：
T. Palomar;A. Chabas;D. Bastidas;D. Fuente;A. Verney-Carron
本工作的重点是海洋气溶胶对钠钙，钾钙和铅硅酸盐玻璃样品的影响。进行了两种测试，第一种是在实验室控制条件下进行的，为期36天，以评估NaCl气溶胶对玻璃表面的影响，第二种是在卡波维拉诺（西班牙加利西亚）的海洋大气中进行的，为期3个月。两次试验的结果相似。NaCl气溶胶在高湿环境中起到凝结核的作用，有利于碱金属和碱土金属离子从玻璃表面的浸出和大气气体（CO2、SO2）的增溶;海洋气溶胶也能加速腐蚀，导致表面氢键的丧失和网络的打开，加速腐蚀机理。结果还证实，高湿度有利于玻璃表面的变化和新的结晶相的形成。钠钙硅酸盐玻璃和铅硅酸盐玻璃是最耐用的，而钾钙硅酸盐玻璃由于表面的水解侵蚀而呈现出裂隙蚀变层。在玻璃表面上检测到新的结晶相，包括氯化物、碳酸盐和硫酸盐，这可能与海洋气溶胶、环境颗粒以及从玻璃中浸出的阳离子与大气气体的反应有关。
This work is focused on the effect of marine aerosols on soda-lime, potash-lime and lead silicate glass samples. Two kinds of tests were carried out, the first one under laboratory controlled condition during 36 days to evaluate the alteration of glass surface by NaCl aerosols, and the second one in a marine atmosphere in Cabo Vilano (Galicia, Spain) for up to three months. Both tests showed similar results. NaCl aerosols acted as condensation nuclei in high humidity environments favoring the lixiviation of the alkaline and alkaline-earth ions from the glass surface and the solubilization of atmospheric gases (CO2, SO2).Marine aerosols could also accelerate the corrosion attack inducing the loss of the surface hydrogen bonds and the opening of the network accelerating the corrosion mechanism. Results also confirmed that high humidity favored the alteration of the glass surface and the formation of new crystalline phases. Soda-lime silicate and lead silicate glasses were the most durable ones, whereas potash-lime silicate glass presented a fissured alteration layer due to the hydrolytic attack of the surface. New crystalline phases including chlorides, carbonates and sulfates were detected on the glass surfaces which can be related to marine aerosols, environmental particles and the reaction of the cations lixiviated from the glass with the atmospheric gases.