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Glass corrosion: When fine glass loses its lustre

Glass corrosion is a completely normal process that occurs over time, or at least it used to be. For now we add substances to glass which prevent corrosion or at least delay it. But what is glass corrosion actually?

Well, basically nothing other than rust. But that usually appears red-brown? Correct, and glass which lay buried in soil for centuries shows rainbow coloured structures on otherwise transparent glass.

But the term "rust" is only used to illustrate the concept of glass corrosion. It could also be called glass burn, glass disease or glass pestilence. All these terms only describe glass corrosion. What we are referring to is a slight change in the texture on the surface of the glass.

This change creates the visible weathering, which only takes place on the surface, though. Experts have found out that this process initially releases oxides from barium, sodium or potassium. This inevitably leads to a change of the physical properties – a prerequisite for the subsequently visible rust on the glass, the glass corrosion.

How intensively it progresses depends greatly on the substances affecting the glass. By the way: Glass corrosion also occurs in everyday life – on your own glasses when you put them in the dishwasher.

Do not let the advertising promises of the detergent manufacturers lead you on. Glass corrosion that occurs in a dishwasher is rather due to the glass quality, and: Try rubbing two glasses together. You will be surprised at the marks this can leave.



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