I'm starting a new page to discuss the fate of the giant air compressor that's currently occupying the center of the wood shop.
It needs to be cleaned, as ~ 30 gallons of water and at least a couple gallons of sludge came out of it when it arrived at HF. We've discussed several ideas for cleaning up the compressor:
* Pressure wash the interior.
* Reverse electrolysis.
* Tumble / agitate the tank with acid.
While I've already put a bunch of effort (and money) into the tumbling idea, I'm having second thoughts. A combination of the others might be easier.
In detail, the options:
I have a gas 4000 psi washer that I can throw on my truck and drive over to HF. If we can get the compressor back over to the dock area, we can just hose it out. Pretty simple, really.
We stick a sacrificial anode (like a piece of rebar) into the tank, used as an electrode. We put electrolyte in the tank, then run DC current through the body of the tank. This will pull the rust off the inside of the tank and deposit it on the rebar.
Tumbling with acid:
Probably the most complicated and work-intensive option, which for some reason attracted my attention. This requires removal of the motor, compressor, piping and everything else bolted onto the tank. Probably the most thorough of the options. After the tank is stripped bare, we put 5-10 pounds of nuts/bolts in, along with several gallons of acid. We gently spin the tank on a homemade roller setup, causing the acid and nuts/bolts to churn and bounce around inside, knocking loose all the cruft.
While I originally thought #3 was the best option, doing #1 and then #2 in order would be faster and easier.
P.S. A big thanks to Nick for cutting the axle holders for the tumbling setup on his plasma cutter. If we go that route, they'll be used to hold the wheels up. There's still a lot more work to do on the tumbling jig if we decide to go that route.