i am going to buy a welder and don't want to have to buy argon and a expensive welder so I'm gonna probably going with flux wire welder and i am wondering the flux on the weld if it is chipped off then ground with a grinder will it oxides or will it just be normal? I am going to use bondo so splatter doesn't matter. And i am probably going to fabricate my own bumper will the welds hold up on the joints?
after how long does the weld rust faster then normal metal?
The flux is used to prevent immediate oxidation during the welding process. These welds can be ground as needed and treated the same as other gas MIG welds. The bare metal left behind will oxidize (rust), just the same as ant other bare metal containing Iron, so the metal needs to be treated ( painted, primered, or coated ). The strength of the welds should be just fine depending on your welding ability.
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