Rusted in tap wrench.

In a non productive mode for some reason.  Need to work my way out of that with easy things.

This is a 15" tap wrench from a rummage sale.
It is going to be a bit of a test case for vinegar on badly rusted steel with moving parts.  Vinegar has been doing a bang up job on removing mill scale for me.

Have a fresh gallon of evapo-rust but want to see how the vinegar works.  It's been soaking it in vinegar but not submerged.  Need to get a PVC pipe to do that.  Thinking vinegar is thin and may creep into places other de-rusters may not go.  Have not verified that.

Reverse electrolysis only works on surface rust as it is line of sight.    

May alternate with heat.


The brown and sharpe lathe has lost of rusted in things that are supposed to move.   Maybe apply what I learn here there.

Chirpy says "420 degrees before it starts to affect temper
those are probably tempered into 500F tho, that way they're not super hard, but still have a little deformation in use and you could always wrap that area of the tap wrench up in a soaking wet rag too, it'll soak the heat away and let you heat that up without worrying about losing the temper"