Method for repairing glass-lined equipment by sol-gel process

Details Method for repairing glass-lined equipment by sol-gel process Method for repairing glass-lined equipment by sol-gel process

1990-05-29

1991-10-01

Ball, Michael W.

Coating processes

Restoring or repairing

Metal article

427140, 156 94, 156 98, 264 36, 2940218, B32B 3500, B05D 138

Patent

active

050532510

ABSTRACT:
A method of repairing a damaged portion of a glass layer of glass-lined steel equipment by repeated steps of applying a repair agent to a damaged area of the glass layer and then heating the repair agent for solidification and adherence to the glass by the use of a sol-gel process, until a thickness of a repair glass layer becomes almost equal to the existing glass layer adjacent thereto without generating cracks or exfoliations in the glass. Also, an apparatus for heating the repair area of a layer of glass-lined steel equipment includes a flexible thermal insulation sheet body having a recess on a single side thereof; electric heater units provided in the recess for emitting far infrared rays; magnets provided adjacent to the recess for securing the sheet body on a wall of glass-lined equipment covering the damaged portion to be repaired; a silica glass cloth enclosing the body for maintaining configuration; a thermal sensor placed in the recess for locating adjacent to the damaged area; and a thermal controller coupled to the sensor and the heater units for automatically controlling the temperature of the heater units.

REFERENCES:
patent: 2355474 (1944-08-01), Shepard et al.
patent: 2722734 (1955-11-01), Grant
patent: 2955952 (1960-10-01), Herbst
patent: 3551234 (1970-12-01), Britton
patent: 4330572 (1982-05-01), Holt et al.
patent: 4861410 (1989-08-01), Clark et al.
patent: 4940607 (1990-07-01), Culler et al.

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