Yes..look up alumaloy welding rods
Yes.
can weld aluminium with a mig or tig welder
J B Weld or a similar epoxy.
Aluminum is not only hard to weld when exposed to atmospheric air, it is impossible. All aluminum arc welding processes must be shielded from the air. Gmaw (mig) and gtaw (tig) used sheilding gasses such as pure argon or argon mixed with co2 or helium depending on the application. Smaw (stick) process uses a flux to shield the weld. Aluminum is very reactive making it one of the hardest materials to weld. The cleaner the aluminum is the better it will weld. Aluminum must be free of anything that produces hydrocarbons when heated, such as paint, oil and lubricants. Aluminum must be clean and well shielded from the air to achieve a quality weld.
The best fix would be to weld it yes. To do a proper weld on aluminum you are going to want to only use a TIG welder. You can also have decent results with industrial J-B Weld. The area would need to be properly prepped and cleaned though for best results.
Yes. I've used it on aluminum as a permanent repair. I'd recommend prepping the surface thoroughly.
No . . . that would be extremely dangerous.
the only way you can weld aluminum is with AC current and high freak setting on the welder , if your welder does not have theses setting then it will not weld aluminum. Good answer! AC is a must! The only other way is if you have an oxy/ace setup (very low psi) or alot of mapp gas, but you have to spread a flux paste on the material (looks like drywall mud) EXTREMELY MESSY!
Most commonly used is argon, but Helium can be used as well.
You should not weld on concrete, as it can explode if heated
Cast aluminum has one third of the strength of extruded aluminum. As a result, cast aluminum has the potential to experience deformities due to its elasticity.
You will probably need too weld any holes in your aluminum livestock trailer. It is best to higher a professional welder as this can be very dangerous.