Re: Galvanized metal welding

Zinc coating needs to be removed before welding. It will contaminate the weld. Worse, the zinc fumes released during welding are toxic. You can get very ill from inhaling zinc fumes while welding.

To protect a completed weld, you could have the part hot dip galvanized, but the part has to be portable for that. Most galvanizing vendors charge by weight for the service, so it may be reasonable. Another choice for portable parts would be powder coating.

If it's not portable, such as a fence, spray epoxy primer and catalyzed auto paint would work pretty well.

Ted wrote:
Anyone know of a way to make the welds in galvanized fence tubing rustproof? I would think the zinc in the tubing would transfer to the welded joint. Any thoughts appreciated. TIA Ted


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Relevant Pages

  • Re: Galvanized metal welding
    ... You can get very ill from inhaling zinc fumes while welding. ... To protect a completed weld, you could have the part hot dip galvanized, but the part has to be portable for that. ... Zinc fumes make you very sick but cadmium fumes will make you really sick and KILL YOU. ...
    (sci.engr.joining.welding)
  • Re: Conduit nipper?
    ... make a notcher for this like they do pipe? ... galvanizing off the EMT before you try to weld on it, ... Inhale the vaporized zinc fumes while welding something galvanized ...
    (rec.crafts.metalworking)
  • Re: Silver soldering with iron, not torch
    ... Watch out for zinc fumes as well. ... Drink milk. ... Weld what you want to! ... Trevor Jones ...
    (rec.crafts.metalworking)