Coating processes – With pretreatment of the base – Heating or drying pretreatment
Patent
1978-08-17
1980-01-15
Kendall, Ralph S.
Coating processes
With pretreatment of the base
Heating or drying pretreatment
427433, 118 65, 118 67, 118 69, C23C 102
Patent
active
041839838
ABSTRACT:
Sealing means for preventing metal vapor, and in particular zinc vapor, evolution from the surface of a bath into a furnace is provided at the exit end of the heat processing industrial furnace through which a continuous metal sheet is advanced. Upon exiting the furnace the metal sheet is dipped into a bath for hot dip coating thereof. At the zone of the industrial furnace from which the continuous metal sheet exits the furnace and advances into the coating bath, there is provided therein an atmosphere having a low dew point and a relatively high hydrogen content to thereby reduce the oxidation of the metal vapor which may have migrated into the furnace. Furthermore, sealing means are provided between zones of the furnace to retain the integrity of this atmosphere, and thus isolating zones having different atmosphere compositions.
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patent: 3320085 (1967-05-01), Turner
patent: 3827854 (1974-08-01), Gildersleeve
patent: 4082868 (1978-04-01), Schnedler et al.
patent: 4103644 (1978-08-01), Michels
Gibson et al., Zincgrip OS Armco's One-Side Galvanized Steel, The Product and The Process, The Galvanizers Committee Meeting, Birmingham, Alabama, Apr. 26, 1978, 12 pp.
Cook Eugene A.
Gottschlich Chad F.
Kendall Ralph S.
Selas Corporation of America
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