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How do I restore an iron doorknob that has been subject to weathering and salt water?

Chemistry assignment for year 12 student. Topic is called shipwrecks and salvage. I am to expose an object found on a ship to salt water conditions as if it had been sunk, and then restore it. I need to know the techniques of restoration of iron to complete the assignment.

Matt O'Dwyer
- Billinudgel, new south wales, australia
2003

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Have you tried unsuccessfully to locate books on this topic? Visit your librarian and ask him/her for help. There is a process of applying electricity in the opposite direction that electrons usually flow during corrosion, so as to try to turn back the clock. It's more applicable to non-ferrous metals (such as coins) than to iron, but it may have some usefulness. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey
2003

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