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Body Repairs - General Information » Body Sheet Metal
Coated steel panels

In a similar way to high-strength steel panels, coated steel panels are finding more applications because of the better corrosion protection which they offer. There are basically two different process which are used to apply a zinc layer:

  • Hot dip zinc coating.
  • Electrolytic zinc plating

The following points must be noted when welding:

NOTE: Welding fumes are harmful to health. Make certain that the workspace is well ventilated and use welding fume extraction.

  • Zinc starts to melt at about 420 C.
  • The zinc vaporizes at a temperature of about 900 C.
  • The amount of heating determines the damage to the zinc coating, and therefore to the corrosion protection.
  • NOTE: Coated panels have a higher electrical resistance, but this can be compensated for by increasing the welding current by 10 - 20% .

Resistance spot welding is particularly suitable for welding zinc-coated panels, because no widespread warming occurs.

  • With electrolytically zinc-plated panels there is no need for any special preparation because the zinc coating does not need to be removed.
    More about «Body Sheet Metal»:

    High strength steels

    Ultra-high-strength steels

    Coated steel panels

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