Recommendations for fabrication

Our Recommendations

LOCWELD Galvanization is committed to assist you in preparing your material to be galvanized. Our duty is to share our expertise with our clients to obtain galvanized products not only that meet your expectations, but exceed them!

Do not hesitate to contact us before delivering the material to our factory to ensure that the preliminary steps for galvanizing are met. Thus, it will save you time and optimize the quality of the final product.

Essential elements:

Ensure no paint markings, varnish, grease or welding flux residues are on any material.

  • Painted and varnished material requires sandblasting before it is delivered to our facility and can’t be galvanized until all paint is removed.(paint markers included)
  • Grease is removable at our plant to a certain degree but it slows productivity and requires the material to remain hours to days in the caustic solution tank
  • All the welding flux residues must be removed as well or uncoated areas will result.

 

Make sure to drill drainage and venting holes in the right areas of your material to avoid zinc accumulation during the galvanizing process.

  • Appropriate holes are an imperative process to optimize the final quality of the galvanized steel. In addition, it is required to ensure the protection of our Team as improper air circulation can create an explosion of the molten zinc due to air pockets.
  • We do offer this service if necessary (holes are burned – not drilled).

 

Whenever possible, avoid any of the following combinations within the same fabricated piece:

  • Components of different steel grades.
  • Cast iron with steel.
  • New material with older, heavily oxidized or pitted material.
  • Different types of materials have individual surface preparation parameters and galvanizing process requirements. When combined prior to galvanizing, it may result in non-uniform quality and appearance of the zinc coating.

 

Consult ASTM Standard A-384 “Safeguarding Against Warpage and Distortion During Hot Dip Galvanizing of Steel Assemblies” for proper techniques and considerations to minimize distortion and warpage during galvanizing

Overlapping of surfaces and narrow gaps are not recommended, however if they cannot be avoided, as per CSA G164: Appendix B “Recommended Principles of Design and Preparation of Materials Prior to Hot Dip Galvanizing” and the ASTM Standard A-385 “Providing High Quality Zinc Coatings (Hot Dip) on Assembled Products” should be consulted for proper fabrication procedures.

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