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  Design Basics for Galvanizing  
 

The key to obtaining the best results from the galvanizing process depends largely on timely consultation between the Galvanizer, Fabricator and the Designer. Quality of the coating can also be improved by matching design features that aids the access and drainage of molten Zinc. Good design requires proper means for the access and drainage of molten Zinc and for escape of gases from internal compartments (venting).

 
     
  Basic Rules during Design and Fabrication  
 

Here are some of the basic rules which should be followed during design and fabrication.

  • You can galvanize all mild steels (essentially, they should be free of any other coatings)
  • You can galvanize a wide variety of shapes and sizes and weights. For odd / unusual shaped items, please feel free to contact us on +974 55571029 .
  • Follow the design guidance about vent / drainage holes in hollow sections.
  • Avoid overlapping surfaces if possible. If you cannot avoid them, make sure you follow the venting guidance (ref : engineers & architects guide for Hot Dip Galvanizing)
  • Remember the galvanizer must lift and turn your fabrication. Make sure you provide lifting points / lugs etc for him to use.
  • Do not ask your galvanizer to galvanize fabrications which are very stiff in one plane but not in another. They will almost certainly distort.
  • Avoid large unsupported areas of Sheets / Plates / fabricated steel. They will probably distort.

The galvanizing reaction between zinc and steel takes place in liquid zinc, usually at 445 - 455 deg. C. At this temperature iron and zinc react quickly. Typically the steel may be in the zinc for only a few minutes. The fabrication is taken out of the zinc, when the reaction is complete. Although the zinc coating has already formed, it's internal structure continues to change until the steel returns to normal temperature.

 
     
     
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