On Tue, 24 Dec 1996 mwjordan@JUNO.COM wrote:
> I could use some help.
>
> On a current project, I need to weld 3/16 inch galvanized metal disks
> inside a 1/4 inch wall steel pipe. I seem to recall a thread several
> months/weeks ago about removing the galvanized coating from iron or steel
> but did not retain.
>
> My questions are, can the galvanized steel disks be welded to the steel
> pipe without removing the galvanized coating, and if not, how does one go
> about removing the galvanized coating.
>
I'm not aware of any way to do it without first removing the
galvanizing. At least I know that MIG welding won't work. If you try
gas welding it, the heat will cause the coating to come off. Remove the
coating by grinding it off; it usually isn't thick. Do your welding in a
well ventilated area. Coating near the weld will burn off, producing
toxic zinc fumes. How toxic? A whiff or two won't produce permanent
damage, but you would not want to breath a lot of it.
WRG
Ray Gibbons Dept. of Molecular Physiology & Biophysics
Univ. of Vermont College of Medicine, Burlington, VT
gibbons@northpole.med.uvm.edu (802) 656-8910
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