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In Reply to: RE: Plastic ;-) posted by Chip647 on August 10, 2016 at 08:54:52
nada aqui
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Buy Chinese. Bury freedom.
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nada aqui
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Buy Chinese. Bury freedom.
Wax or lead. When hard rubber came along, it was also suitable.
It is possible to generate hydrofluoric acid "in situ" by using sodium fluoride and sulfuric acid. That mix etches glass "like gangbusters".
The etching occurs as silicon dioxide is converted to volatile silicon tetrafluoride and water. The silicon tetrafluoride vaporizes (a product is removed) and, per Le Châtelier's principle, the reaction is driven to "completion".
If lots of the acid is present, all of the glass will be consumed. Lots of glass and little acid yields the results we see.
Eli D.
It can rid your tub of the most stubborn stains...and rid you of your tub, too...
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