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**Patgaepx** · 08-03-2012, 07:50 PM

toughened glass can do exactly what you have described. it has something to do with the way it is made and internal stresses that are inherent in the manufacturing process. a slight scratch can lead to catastrophic failure. the rusty fixing may have placed undue pressure at one location. bit like how rusty reo in concrete can blow bits of the surface out, concrete cancer i think it is called.

I understand there could be any number of reasons for it, but what I am interested in is whether or not rust can affect the surface of glass, can it 'pit' it?

I really don't think it is likely to be from expansion of the screw as it rusts because the screw was countersunk and had some expansion room within the countersunk area. I also think it would be odd if the cause was expansion and contraction of the glass as in the link supplied by furious because it exploded at a very stable time, and just hours earlier it was subjected to hot showers, if there was a defect that was a ticking time bomb I would have thought that hot showers after a cold night would have triggered it.

I know it will never be known what caused this, but I am interested in whether it is even a possibility that rust could undermine the surface of safety glass, or is the only effect rust can have on glass cosmetic?

08-03-2012, 07:50 PM	#7
Patgaepx Join Date Oct 2005 Posts 419 Senior Member	toughened glass can do exactly what you have described. it has something to do with the way it is made and internal stresses that are inherent in the manufacturing process. a slight scratch can lead to catastrophic failure. the rusty fixing may have placed undue pressure at one location. bit like how rusty reo in concrete can blow bits of the surface out, concrete cancer i think it is called. I understand there could be any number of reasons for it, but what I am interested in is whether or not rust can affect the surface of glass, can it 'pit' it? I really don't think it is likely to be from expansion of the screw as it rusts because the screw was countersunk and had some expansion room within the countersunk area. I also think it would be odd if the cause was expansion and contraction of the glass as in the link supplied by furious because it exploded at a very stable time, and just hours earlier it was subjected to hot showers, if there was a defect that was a ticking time bomb I would have thought that hot showers after a cold night would have triggered it. I know it will never be known what caused this, but I am interested in whether it is even a possibility that rust could undermine the surface of safety glass, or is the only effect rust can have on glass cosmetic?
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