The reasons why these spatters occur are numerous like
1. High Current - Low Voltage
2. Long arc length
3. Damp electrodes
4. Wrong selection of shielding gas etc.
but spatter is a cosmetic imperfection and does not affect the
integrity of the weld. Its a sign that the welding conditions are not
ideal. But they are always produced in the open arc consumable
electrode welding process.
The removal of spatter sometimes becomes necessary because
1. They are a hinderance in the proper adhesion of coating (if
applied)
2. As already pointed out by Mr. Malemela, they are somewhat cathodic
to the base metal.
3. In case of tank bottoms weld seams that have to be vacuum tested,
they give false indications or may be right on top of a pinhole or may
even scratch the seal of the vacuum box.
Hope this helps
Regards,
M.Ali
On Oct 6, 2:23 pm, rohit rawat <rohit30...@yahoo.co.in> wrote:
> Hi there,
> can anybody out there let me know the reason, why the
> spatter occurs and is this akind of defect or we simply remove them
> due to the asthetics.
> Rohit Rawat
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