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Welding galvanized sheet metal

Welding galvanized sheet metal

Warning

It is extremely important for satisfactory spot extraction equipment to be provided in areas where heat is generated by the work carried out there, such as welding, grinding, cutting and drilling.

Complement this with effective respiratory protection like a face mask with charcoal filter or better still a fresh-air mask.

When heated, all paints, sealants, adhesives and anti-corrosion agents give off substances which are injurious to health.



Use a wire brush and hot-air gun to remove any paint from the surface. A grinder can remove the galvanized surface and must not be used.

Important

A bare galvanized sheet metal surface begins to rust immediately. When grinding galvanized sheet metal to bare metal , it is important to apply primer to the bare surface within max 30 minutes. Use an acid-hardening (etching) primer.


Galvanized sheet metal should be spot-welded. Weld using slightly higher temperature and pressure than for ordinary cold-rolled sheet metal. Apply a zinc-based primer between the surfaces that are to be welded together.

Use welding rod suitable for galvanized sheet metal, for example, "Magsi 54" as well as an ordinary controlled atmosphere of mixed gases type for MIG-welding.

For filling work, use special filler for galvanized sheet metal., for example, Top filler (10) 82 85 488 , with Standox hardener (10) 82 85 496.

Working with galvanized sheet metal requires a higher standard of protective equipment than ordinary cold-rolled sheet metal.


All new methods and materials can be used on cold-rolled sheet metal.