Rust
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+ | [[Image:Rust at battery tray old versus new.JPG|thumb|300px|A rusted battery tray.]] | ||
=What causes rust?= | =What causes rust?= | ||
==What is rust?== | ==What is rust?== | ||
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Rust is a kind of corrosion -- a decay or breakdown of a material in reaction to its environment. Specifically, rust is an electro-chemical corrosion that occurs in the presence of iron, oxygen, and water. Oxygen and water are available in the open air, and iron is the principal ingredient in steel. | Rust is a kind of corrosion -- a decay or breakdown of a material in reaction to its environment. Specifically, rust is an electro-chemical corrosion that occurs in the presence of iron, oxygen, and water. Oxygen and water are available in the open air, and iron is the principal ingredient in steel. | ||