cdecarvalh
New Member
- Messages
- 3
- Location
- Dorset
Good Morning all,
We've being trying to MIG weld SMO and after a few (more than 10) attempts, we can't solve the issue with some black spots after electropolishing. After contacting several people, I've being told they are carbon and can be removed by wire brush and then job is complete, however wire brushing is only "coating" the black spots and our concern is the the corrosion resistance on this spots.
We tried different shielding gases, flow rates, synergic lines, cleaning/not cleaning, chamfered with machine/angle grinder and even welding in a cobot and the spots are still present.
98%Argon, 2% Co2
55% Helium, 2% Co2, Balance Argon
38% Helium, 2% Co2, Balance Argon
100% Argon
I'm wondering if anyone came across the same problem.
We've being trying to MIG weld SMO and after a few (more than 10) attempts, we can't solve the issue with some black spots after electropolishing. After contacting several people, I've being told they are carbon and can be removed by wire brush and then job is complete, however wire brushing is only "coating" the black spots and our concern is the the corrosion resistance on this spots.
We tried different shielding gases, flow rates, synergic lines, cleaning/not cleaning, chamfered with machine/angle grinder and even welding in a cobot and the spots are still present.
98%Argon, 2% Co2
55% Helium, 2% Co2, Balance Argon
38% Helium, 2% Co2, Balance Argon
100% Argon
I'm wondering if anyone came across the same problem.
