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Oils on rusty metal

q4agl
in Chemistry

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Does aplying oils on rusty metal witout 1st cleaning off the surface rust still prevents furthur rusting as long as the oil is there, or rusting can still continue inside?

Is there liquid or something that can wipe off rusts like magic

I would say if submerged in mineral oil, existing rust will not progress.

Not magic; but science, the best I can suggest is electrolytic rust removal :

 

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Simple chemicals and can be done at home.

You can stop further rust on the surface but not guaranteed to stop internal rust if moisture still present in that metal (like between cracks)

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