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How to measure the amount of rust formed in a rust experiment

Hi! I'm a sophomore in high school and I am doing an experiment on what paint best prevents rust from forming. I am confused on how to actually measure the amount of rust that will form on the nails that I am using. Wondering if you could help.

Thank you.

Shannon J [surname deleted for privacy by Editor]
High School Science Fair - Chicago, Illinois, U.S.
2005

You might check my response to letter 37621.

James Totter, CEF
- Tallahassee, Florida
2005

2005

In industry corrosion performance is often measured by a salt spray test. This involves placing the parts in a salt water atmosphere and measuring the amount of time in hours until the first sign of corrosion.

Perhaps you can use this approach too rather than trying to isolate the rust and weighing it. It will be easier.

best of luck
Peter

Peter Van de Luecht
- Melbourne, Vic, Australia

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