# Does aluminium dissolve in soda glass?

Specifically, if a piece of aluminized glass is heated to the melting point of the glass will the coating dissolve into it or otherwise react with it?

• I think nothing will happen - you get molten salt polymer and molten metal phases - very different properties. – Mithoron Oct 21 '15 at 12:14
• @Mithoron would a thermite-like reaction happen? blog.teachersource.com/2011/03/02/silicon-from-sand or would it have to be well above melting point? – DavePhD Oct 21 '15 at 12:54
• At least with quartz it's supposed to be hard to trigger - researchgate.net/publication/… - obtained by arc discharge (!) – Mithoron Oct 21 '15 at 13:06
• The aluminum would like to oxidize, and may end up grabbing some oxygen from the glass. It will likely end up as a alumina-silicate glass (with the sodium/boron/whatnot as well). – Jon Custer Oct 21 '15 at 14:13

Since soda[-lime] glass is specified, then Al will react with the alkali forming an aluminate, e.g. $$\ce{Na2Al2O4}$$. This may or may not dissolve in the molten glass, depending on concentration of the aluminate(s), temperature and cooling rate. If it precipitates, the glass would have a "frosted" appearance.