DESIGN MANUAL FOR GALVANIZING
Hot dip galvanizing provides the highest quality corrosion
protection for steel. Understanding the fundamentals of
the galvanizing process and important design factors for
steel products to be galvanized will help you to get the
best protection for steel products. This section describes
the galvanizing process and important design factors. More
Information is available in the Industrial Galvanizers "Design for Galvanizing Manual"
which can be downloaded.
The Hot Dip Galvanizing Process:
Watch presentation
on hot dip galvanizing (234KB)
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Important Design Factors:
Hot dip galvanizing is a self inspecting process that relies
heavily on proper design to achieve a quality result. The
major difference between hot dip galvanizing and paint coatings
is that hot dip galvanized coatings can only be applied
to perfectly prepared surfaces.
- The zinc will not react with the steel to form the
galvanized coating unless the surface of the steel is
perfectly clean.
- The hot dip galvanized coating will not form unless
the zinc can intimately contact the steel surface.
- The hot dip coating will not form unless the steel
is heated to 445o-460oC.
- Items cannot be galvanized unless the item will fit
in the preparation tanks and galvanizing bath
Design for effective galvanizing falls into four major
categories:
| Venting |
Vent holes may be needed to prevent air pockets and
to allow ash to escape during galvanizing |
| Draining |
Drain holes may be needed to allow zinc to flow freely
as the item is immersed and removed |
| Dimension Instability |
Steel is raised to approx. 455oC. in galvanizing
and heat and stress distortion should be considered |
| Design |
Basic design rules include steel selection, thicknesses,
welding, cutting etc. |
You will find more detailed answers to common galvanizing
questions on our Z-File & FAQ
page.
The complete Industrial Galvanizers "Design for Galvanizing
Manual" can be downloaded to your computer from this
site.
To view the file you need the Adobe Acrobat Reader 3.0.
This reader is available free of charge from Adobe - Use
this link to get the reader: 
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Design for Galvanizing Manual:
Downloading Hints: To save files
to your hard disk for later viewing:
- Right click your mouse on the link to the file you
want to download (eg Design for Galvanising Manual)
- Select the SAVE AS option (Netscape "Save Link
As", Internet Explorer "Save Target As")
- Select the directory on your hard disk where you want
to save the file
- Click "Save" and the file will start to download
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