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Salt water rust corrosion on cast steel chuck

We have just received a new 60" diameter cast steel chuck from Taiwan. The Cosmoline protector was apparently applied too lightly and somewhere in transit has acquired surface rust....this is a relatively rough surface and it has machined components that we don't want to compromise the finish there something out there in the form of a chemical that can quickly clean a metal surface of rust without using abrasive pads, etc. in conjunction with it to make this chuck look good again? Thanks

Richard C Davis
- St. Paul, Minnesota

It would have to go through a thorough solvent cleaning, alkaline cleaning and acid pickling to remove the heavy oxides, then a neutralizing step and thorough rinse and dry. This involves regulated and harsh chemicals, safety and health issues. Somewhat messy for a company not dedicated to surface finishing of large parts. An option would be to find a hard chrome plater in town and let him just clean it.

Guillermo Marrufo
Monterrey, NL, Mexico

I've had good luck cleaning up rusted iron parts with HCl(Muriatic (pool)acid) Just be sure you wash it off out side(fumes) and immediately coat it with oil(or it will re-rust before your eyes).Be careful and don't get any on you(it burns)

Paul Salassi
- Groveton, Texas

I would think that naval jelly [on eBay or Amazon] would be a good option. I would also use some fine scotchbrite pads with it to smooth out some of the roughness with a very minor amount of metal removal. A lot is going to depend on the amount (thickness) of the rust. It will leave a slight amount of corrosion resistance also. Follow the instructions. It is a weak acid.

James Watts
- Navarre, Florida

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