Summary for lower zinc thickness Discussion
Lower zinc thickness by higher line speed is the basic idea behind the question, but the thread excerpt provided does not include any actual Q&A discussion or technical answers. The only visible content is a promotional line for suggested galvanizing books, including "Faults in Hot-Dip Galvanizing" by Dietrich Horstmann, with no advice on line speed, coating thickness, or process limits. Because the source text is incomplete, there is no named answerer to attribute and no documented conclusion about whether increasing line speed will reliably reduce zinc thickness. A fuller thread would be needed to summarize the practical guidance or any differing views from participants.
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“Hot Dip Galvanizing of Steel Structures” by Kuklik & Kudlacek (2016)
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“Handbook of Hot Dip Galvanization” by Maass & Peissker (2011)
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“Galvanized Steel Reinforcement in Concrete” by Stephen Yeomans (2004)
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“Hot Dip Galvanizing — A Guide to Process Selection & Galvanizing Practice” by M. J. Hornsby (1995)
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“Faults in Hot-Dip Galvanizing” by Dietrich Horstmann (in English, French & German)
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“User’s Guide to Hot Dip Galvanizing for Corrosion Protection in Atmospheric Service” by NACE (1997 only rarely avail.)
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Q. We have continuous hot dip galvanising lines (Bronx-Australia). I have increased the line speed from 150 mpm to 180 mpm for 0,35 mm thick low carbon sheets, and I want to get as minimum as low coating like 45/45= 90 gr/m2 zinc coating.It is now around 110 gr/m2.Also I want to reduce the noise.
Temperature of zinc pot is increased from 460 °C to 470 C.
Gap of nozzle 0,85 mm to 1,20 mm from middle side to outer side at air knife.
Pressure of blowers on air knife point is 0,6 bar.
Is it possible to get 45/45=90 gr/m2 zinc coating on 0,35 mm sheet at 180 mpm line speed.?
I will grateful if someone can suggest the method to lower the coating thickness with those conditions mentioned above.
Serdar
plating shop – Turkey
2005
A. Yes. It is possible to reduce the coating. But it requires more information. From the infromation available I can suggest, reduce the nozzle size, so that the flow can be reduced.
Alternately you can increase the speed of travel, if you get proper coverage.
V. G. Rajendran
– Trichy, Tamilnadu, India
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