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首页> 外文期刊>European Journal of Glass Science and Technology, PartA. Glass Technology >Comparative study of weather induced corrosion mechanisms of toughened and normal float glasses
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Comparative study of weather induced corrosion mechanisms of toughened and normal float glasses

机译：天气诱导淬火和正常浮动眼镜腐蚀机制的比较研究

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摘要

This study compares the degradation behaviour of toughened (chemically and thermally) and not toughened glasses. Soda-lime-silica float glasses were artificially weathered in a climate chamber for up to seven days and investigated by optical microscopy, atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). For all glasses, two specific carbonates were found to develop during weathering: dendritic trona (Na-3(HCO3)(CO3)center dot 2H(2)O) and a several nm thick layer containing sodium bicarbonate (NaHCO3). Furthermore, this work shows that Mg diffusion in the surface near region of tempered and untempered glasses does occur. It is enabled by the accumulation of Na and Ca species on the glass surfaces and the accompanying changes in the glass structure in that region. While the thermal toughening of glass showed no significant effect on the degradation behaviour compared to the untoughened glass, the chemical toughening procedure leads to dramatic changes in the corrosion behaviour: lateral changes in the surface chemistry are more pronounced while vertically chemical changes do not occur as deep as in the case of tempered and untoughened glasses. This is related to the integration of K atoms in the glass network during the toughening process replacing the smaller Na species and hence reducing the interstitial spaces within the glass network and so mitigate the corrosive attack of water in the depth.
机译：该研究比较了增韧（化学和热）的降解行为，而不是钢化玻璃。钠钙 - 二氧化硅浮动玻璃在气候室中经过长达七天的气候风化，并通过光学显微镜，原子力显微镜（AFM）和X射线光电子谱（XPS）研究。对于所有眼镜，发现两种特定的碳酸酯在耐候期间发育：树突状的天鹅段（Na-3（HCO 3）（CO 3）中心点2H（2）O）和含有碳酸氢钠（NaHCO 3）的几个NM厚层。此外，该工作表明，在回火和无限的眼镜的表面附近的表面中的Mg扩散。它通过玻璃表面上的Na和Ca物种的积累和该区域中玻璃结构的随附变化而实现。虽然玻璃的热增韧对与不间断的玻璃相比的降解行为没有显着影响，但化学增韧程序导致腐蚀行为的显着变化：表面化学中的横向变化在垂直化学变化不会发生时不会发生像回火和不收缩的眼镜一样深。这与在增韧过程中替换较小的NA物种期间玻璃网络中的K原子的集成有关，从而减少玻璃网络内的间隙空间，因此减轻了深度水的腐蚀性攻击。

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