Coating processes – Application to opposite sides of sheet – web – or strip
Patent
1980-04-30
1982-10-05
Pianalto, Bernard D.
Coating processes
Application to opposite sides of sheet, web, or strip
427211, 427321, 427345, 427349, 427360, 427365, 4273983, 427422, 427424, 427427, 427428, B05D 100
Patent
active
043528384
ABSTRACT:
Metallic articles, for instance, ferrous strips are metallized, for instance, zinc coated by passing the heated article through a coating chamber and applying thereto a continuous stream of the molten coating metal so as to uniformly and evenly metallize said article. Thereafter, excess molten coating metal is removed from the coated article by hot gas blasting and the hot gas blasted article leaving the coating chamber is immediately cooled. Wiping means may be provided before applying the molten coating metal so as to deflect any molten coating metal dropping from the metallic article passing therethrough, while rollers may be arranged between the coating metal applying means and the hot gas blasting means. Said rollers serve to remove the major part of excess coating metal from the coated metallic article and to stabilize movement of the metallic article passing through the coating chamber. In contrast to known application of coating metal by atomizing or spraying, no gas is admixed to the continuous stream of the molten coating metal which is, so to say, gently poured onto the surface of the metallic article. Thus coating is effected within a short period of time and a non-porous coating is achieved. Further said short period of time of exposure of the steel article to the liquid zinc enables to eliminate the customary addition of aluminum to the spelter, thus permitting the use of steam for the hot blast instead of the more expensive non-oxidizing gas for that purpose, likewise eliminating the formation of White rust.
REFERENCES:
patent: 3809570 (1974-05-01), Herman
patent: 3816157 (1974-06-01), Donohue
patent: 3941906 (1976-03-01), Bostroem
patent: 4173663 (1979-11-01), Bostroem
patent: 4239817 (1980-12-01), Koenitzer et al.
LandOfFree
Dipless metallizing process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dipless metallizing process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dipless metallizing process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-423384