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Rusting: where has all the rust gone?
Words to learn: rust • iron • air • water • coating
Iron still rusts, so why do we see much less rust nowadays?
WHAT IS RUST?
When iron is exposed to air and water, it slowly changes and a new reddish-brown material called rust is made.
WHY DON’T WE SEE MORE?
Paint, plastic and other coatings keep air and water away from the iron, so rusting cannot easily begin.
WHERE SHOULD WE LOOK?
Look where a protective coating has been scratched or damaged. That is often where rust starts first.
WHAT YOU NEED TO KNOW
NOW LOOK AT THE TEXTBOOK
