Having gotten into a discussion with another mig-driver today over the little gold blobs on welds - I looked through some pictures I'd taken recently and noticed that using the same wire and parent alloy, I got more of them with 100% CO2 than I did with 14% CO2 mix.
I've assumed they're silica residue caused by silicone added to the wire to de-oxidise the weld melt.
Is it likely that I'm seeing more in the CO2 because there's more oxygen in the gas compound than there would be in a 14% CO2/Ar gas? By that logic would I still see less with a 5% CO2/Ar? "other guy" uses 5% and doesn't get them.
I've assumed they're silica residue caused by silicone added to the wire to de-oxidise the weld melt.
Is it likely that I'm seeing more in the CO2 because there's more oxygen in the gas compound than there would be in a 14% CO2/Ar gas? By that logic would I still see less with a 5% CO2/Ar? "other guy" uses 5% and doesn't get them.