william_b_noble wrote:

an old automotive mechanic trick to free rusted stuck parts is to use coca
cola - the acid and fizz seem to do the trick
"shedfull" wrote in message
oups.com...

Evening to you all,

I have been given an old 3 inch m/vice which is badly seized with rust.
I was wondering what would be the best way to restore it?

First thoughts were penetrating oil, but that's not not doing much
good, I could set up a de-rusting bath.(bat charger etc)
The sq thread and nut seem in good condition so I think its worth
saving.

What say you?

For sure I'd try electrolytic derusting first. 5 gallon bucket, 1/4 cup washing
soda or baking soda, clean water, 1 or 2 steel electrodes (I use railroad track
tie plates with copper wire soft soldered to them) and a wire to your part. Use
a car battery charger and hook your part to the BLACK (-) wire, and the
electrodes to the RED (+) wire and let it run for 1-3 days, then take it out and
scrub it with a stiff brush under hot water and see how you're doing. Might need
to disassemble it at that point and try again. It works real well. I've got a
bucket sizzling downstairs right now cleaning old pipe threading die heads.

GWE