For many years, fusion welding
(as distinct from gas brazing) has been the default in automotive contexts. A
well-executed fusion weld is typically stronger, than the parent metal(s). So, easy to appreciate why its standard on chassis and other, highly stressed
structural components.
However, there’s no shortage
of have-a-go-heroes.
Suitably qualified, seasoned
weldors suggest this miserable wire feed (MIG/MAG) work will cost around £300
to make good (and ultimately, safe). Penetration and continuity of the beads
are particularly worrying, compared with the original factory work.
My initial thoughts were that repair
had been undertaken using a “no gas” (more accurately “self-shielding”) MIG
unit. These produce a dirty, slaggy cloud. One which makes it hard to track the
accuracy, and progress of the bead being lain. Results are reminiscent of ARC,
requiring more intense grinding/clean up.
Fine if you’re a farmer
performing a running repair, on a wrought iron gate/similar. Their only
advantage over a MIG unit running CO2/Argon CO2 cylinders, is that the
shielding gas won’t be interrupted on a windy day. This was my other hunch. Someone
had attempted repair outside, using a bottle-fed unit, and the elements were further
compromising their efforts…Take a look, see what you think…
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