Why do I get black soot when MIG welding?
1.) too long of an arc length, either by operator stick out, or excess voltage. 2.) Not enough weld energy, increase wire feed speed, or drop down a size in wire to increase current density.
How do you reduce soot when welding aluminum?
Clean the base material with a stainless steel wire brush, and use the correct weld parameters for the wire size to minimize overheating of the weld puddle. If strength is not the most important consideration, 4043 filler wire can be used to reduce soot in this application.
How do you clean aluminum after welding?
The joint should be cleaned before assembly. This can be done using degreasing solvents. Once that is applied, a cheesecloth or paper towel can be used to clean and dry the welding point. Cheesecloth and paper towels provide effective cleaning because they are porous, and hence absorb more oils and moisture.
Why do my MIG welds look dirty?
Several issues in the MIG welding process can contribute to excessive spatter, including: Insufficient shielding gas. Dirty base materials, contaminated or rusty weld wire. Voltage or travel speeds that are too high.
Why is my aluminum weld turning black?
The most common mistake welders make is using a too-large cup-to-work distance. Ideally, the cup-to-work distance for both GTAW and GMAW should be no more than 5/8 in. If you let this distance get too great, the weld turns black. Another important variable is the gun or torch angle.
How do I clean my aluminum MIG welder?
Is acetone good for cleaning aluminum?
Degradation can be achieved by two types of liquids: organic solvents such as acetone and mild alkaline solutions such as soap. It is not recommended to clean aluminum with alcohol since it is not a good degreaser. Solvents such as acetone, methyl ethyl ketone, lacquer thinner, and toluene all work well.
What is that brown on a MIG weld?
You’re referring to the porosity. OP asked about the brown islands. They are created by the dioxider additives in the wire.
What are the white line along the toe of your weld bead during aluminum welding?
These cleaning stripes indicate the area where the reverse-polarity GMAW arc-or the reverse-polarity portion of an AC GTAW arc-has removed the oxide coating cathodically from the aluminum during welding.
What gas do you use for aluminum MIG welding?
The gas for aluminium welding can be argon or helium. These two gases are used pure or mixed. Pure argon is the most popular.