Patent ID: 6113764
Filing Date: 2000-09-05
Classification: B05D,C25D

Abstract:
A process for drying a liquid electrodeposited coating composition applied to a metal substrate, comprising the successive steps of:(a) electrophoretically depositing a liquid electrodepositable coating composition on a surface of the metal substrate to form an electrodeposited coating thereon;(b) applying infrared radiation and warm air simultaneously to the electrodeposited coating for a period of at least about 1 minute, the velocity of the air at the surface of the electrodeposited coating being less than about 4 meters per second, the temperature of the metal substrate being increased at a rate ranging from about 0.25.degree. C. per second to about 2.degree. C. per second to achieve a peak metal temperature of the substrate ranging from about 35.degree. C. to about 140.degree. C.; and(c) applying infrared radiation and hot air simultaneously to the electrodeposited coating for a period of at least about 2 minutes, the temperature of the metal substrate being increased at a rate ranging from about 0.2.degree. C. per second to about 1.5.degree. C. per second to achieve a peak metal temperature ranging from about 160.degree. C. to about 215.degree. C., such that a dried electrodeposited coating is formed upon the surface of the metal substrate.