Metal finishing Q&As since 1989

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Hot Dip Galvanizing

I am required to help setup a Plant for Hot Dip Galvanizing. Can any reader help me with the Chemicals needed at each stage of operations, its concentration,and other features to be incorporated in setting up this plant. Also the setting up of a lab for quality assurance. Also advice on the cycle time and how to control the coating thickness.

Thanks and regards,

R P Roy
- Mumbai, Maharashtra, India
2002

As a galvanizing specialist I can tell you that the process is not that simple. For a good advice more figures are needed like kind of steel, less or more oil/grease, Blasting and/or degreasing, Grade of oxidizing etc. Coating thickness in galvanizing highly depends on steel composition (silicon, phosphorus) and the zinc alloy used. Produced waste material depends on cleaning techniques and working method etc. So maybe you have to hire a galvanizing specialist/adviser.

Dolf van den Berg
- The Netherlands
2002

As a professional in the line of hot-dip galvanizing, I can say it is a big subject to know all the things at a time. Chemicals like hydrochloric acid/pickling inhibitor/degreasing chemicals/chromic acid etc normally requires for most of the hot-dip gal.plant apart from zinc/lead/flux/alloy/tin/antimony/aluminium. Feel free to ask any question on hot dip galvanizing process

MAHBUB HOSSAIN
- Narayangonj, Dhaka, Bangladesh
2002