Method for repairing a glass layer of glass-lined equipment
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United States of America Patent
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Sep 1, 1992
Issued Date -
N/A
app pub date -
Nov 12, 1991
filing date -
Nov 15, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved method for repairing a damaged portion of a glass layer of glass-lined equipment. In the method, a metallic fiber-containing sheet made of a metallic fiber-containing web, a metallic woven fabric sheet or a metallic nonwoven fabric sheet is disposed on the metal substrate of the damaged portion exposed by grinding, and the metallic sheet is welded partially to the metal substrate underlying the glass layer by a resistance or spot weld. After solidification of the repairing agent, e.g., of a sol-gel solution containing a metallic alkoxide which has been applied onto the partially welded sheet(s) and the sol-gel solution impregnated therein, the reapiring glass layer is formed integrally together with the sheet(s) by heating the damaged portion at a temperature from about 300.degree. to about 350.degree. to avoid the occurence of cracks on the glass layer surrounding the damaged portion. A series of the above-mentioned glass forming procedures are repeated until a satisfactory thickness of the reapairing glass layer is obtained.
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