Method of applying a plastic coating

Claim 1

A METHOD OF PROVIDING A DROPWISE CONDENSATION PROMOTING FILM HAVING A THICKNESS OF FROM 2 MOLECULES TO 0.00001 INCH ON A METAL TUBE COMPRISING CLEANING THE OUTER SURFACE OF THE TUBE WITH A SOLUTION OF TRICHLOROETHYLENE, BRUSHING THE SURFACE WITH AN ABRASIVE ALKALINE CLEANER, POLISHING THE SURFACE, CLEANING THE POLISHED SURFACE WITH A SOLUTION OF TRICHLOROETHYLENE, ROTATING THE TUBE ABOUT ITS AXIS AT A SPEED PROVIDING A CIRCUMFERENTIAL LINEAR VELOCITY OF AT LEAST ABOUT 300 INCHES PER MINUTE, SPRAYING THE POLISHED AND CLEANED SURFACE OF THE ROTATING TUBE WITH A WATER EMULSION CONTAINING FROM ABOUT 5 TO 15 PERCENT BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYFLUOROETHYLENES, POLYCHLOROETHYLENES, POLYCHLOROFLUOROETHYLENES, POLYETHYLENES, AND POLYSTYRENES, BY MOVING THE SPRAY UNIFORMLY LONGITUDINALLY OF THE ROTATING TUBE TO FORM A FILM OF FROM 2 MOLECULES TO 0.00001 INCH THICKNESS ON THE SURFACE OF THE TUBE, THEN ROTATING THE COATED TUBE AT A SLOWER SPEED AT A TEMPERATURE OF NOT OVER 200*F. UNTIL THE FILM IS DRY, THEN FUSING THE DRIED FILM AT A TEMPERATURE OF ABOUT 400* TO 750*F., POLISHING THE STILL WARM FUSED FILM WHILE ROTATING THE TUBE AT HIGH SPEED, AND THEN QUENCHING THE COATED SURFACE.