Concerns noted, but confident no chance of any acid residue left. There is probably a higher risk while working with a cast repair that had unknown exposure, and that's something that would be seen fairly often in a welding shop I would imagine.

I have 2 thoughts: first is, why immerse the tungsten in acid? A quick regrind and twist with a ScotchBrite pad turns tungstens back to a bright shiny level. Heck, I don’t even polish mine up 99% of the time. Second, I can’t imagine that introducing acid into a plasma arc has benefit, in fact, it m...

Thanks for the replays. From a chemistry perspective, it seems fine as aluminum is highly reactive to HCL and tungsten non-reactive. Whether the doping (2% lanth) is affected is unknown (will look into that) but the surface finish of the clean area of the tungsten does not change. Also, at least at ...

Hello, first post here. Learned a lot from Jody’s content. I’ve been learning Tig for six months now. Have a fair amount of stick experience in the past building 4x4 truck stuff and a trailer. So far built a custom stainless roof rack for my wife’s car using Tig. Also some aluminum repairs on dirt b...