This is the first time I have tried soaking rusty items in Vinegar, and I am impressed. It's cheap, safe, and isn't too aggressive. This tool soaked for 20 hours and then a quick scrub with a wire brush, and it's clear of rust.
HEY, Where'd you find my external callipers...oh, never mind mine are in my tool box and still rusty I may have to try that!
Be careful putting engine blocks in it as it strips the carbon out and leave the block unusable.
At the suggestion of another forum, I filled an original radiator with white vinegar - left it overnight (12-14 hours) and flushed out far more crud than I'd expected was in there. It ran much cooler afterward. I had also been warned not to leave it too long as the vinegar would find holes in the core.
Molasses is safer on the metal but it takes a lot longer. Mix with about 8 parts water to 1 part molasses. I have derusted almost an entire 24 Touring with it.
I've used feed grade molasses from Fleet Farm with water to de-rust a few things.
Note that it can cause "cratering" of cast iron or make existing cratering from the rust worse. Not sure if it will do the same thing to sheet metal.
I'm impatient, I use electrolysis.
Wow. That be worth doing on small stuff and easy. Tim
How do you setup an electrolysis treatment for a car part?
Chris, Check out youtube. Basically you use water, washing soda, and a battery charger. I'm thinking vinegar is easier but have to confess that I haven't tried electrolysis yet.
If you do electrolysis only use re bar, sheet metal or such, no stainless or chromium type metals for electrodes as you will produce toxic chemicals. KGB
My neighbor uses a five gallon bucket set up for electrolysis for small tools. I had a crab tote that was the wrong shape for many T parts. picked up a plastic watering tank that many T parts will fit into. Between a sand blast attachment for my power washer, a shop oven, bead blast, and a large electrolysis tank just about any part of a T can be cleaned.
Don't derust any suspension or steering parts except by mechanical means. Otherwise you run the risk of hydrogen embrittlement.