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Causes of glass surface damage
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In order to avoid glass damaging the surface must be protected during shipment and storage. Appropriate handling and storage techniques maintain the integrity and the transparency of glass. In addition, after installation appropriate precautions and proper maintenance are needed to guarantee long-term performance.
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 Water Attack
Once glass is separated and installed in buildings, it can withstand exposure to large amounts of water without significant surface damage. However when water enters between the stored panes of glass, it remains blocked and does not drain away. As the water starts to evaporate slowly, it forms a concentrated alkaline solution, which causes staining. Water vapor condensation poses the same danger. It is therefore important that glass is stored indoors in a dry, ventilated location, protected from rain and running water, and protected from significant variations in temperature or humidity.
Alkali attack
Glass is inert to most acids and a wide variety of other chemicals. Only phosphoric and hydrofluoric acid are harmful. Among many other uses, strong solutions of hydrofluoric acid are used for cleaning new concrete. There is a possibility that this acid may be splashed onto the glass during construction of a building. Another common source are concentrated liquid cleaners. When using lubricants for such installations, avoid those containing high levels of alkaline ingredients.
Chemical Air Pollutants
Certain airborne chemicals can also deteriorate glass surfaces. Although glass is resistant to most acids, some forms of hydrofluoric and phosphoric acids react quickly with silica present in glass. There are also other chemicals than might attack glass surfaces. When these substances are in the form of airborne sprays they can be carried for longer distances through the assistance of natural elements. They can be carried not only to industrial, but also to rural and residential areas.
Physical Damage
Inappropriate storing and handling techniques can alter glass, causing physical abrasions such as scratches.
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Photos: GlassOnWeb.com
Last review: December, 2005 |
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