Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
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United States of America Patent
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Jun 10, 1986
Grant Date -
N/A
app pub date -
May 29, 1985
filing date -
May 30, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.
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