Water-resistant porcelain enamel coatings and method of manufacturing same
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United States of America Patent
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Aug 12, 2008
Grant Date -
May 1, 2003
app pub date -
Jul 8, 2002
filing date -
Oct 12, 1999
priority date (Note) -
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Abstract
A water-resistant porcelain enamel coating and method of making the same is provided. The porcelain enamel coating is prepared using a borosilicate glass frit, and mill additions of silica and a zirconia compound. The mixture is applied to a metal substrate and fired, resulting in a water-resistant coating that resists cracking and crazing. The coating is particularly useful in water heaters. In one embodiment, the coating comprises a fine zirconia compound having a median particle size of less than 10 microns.
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