How do nails become rusty?

Answer:

the metal starts breaking down upon contact with water or moisture in the air and bonds with oxygen particles. this is called oxidization and causes the reddish color. There is iron in your blood and it does the same thing when you get a cut. that is why your blood looks red.

First answer by Rosie.wenger. Last edit by Rosie.wenger. Contributor trust: 343 [recommend contributor recommended]. Question popularity: 5 [recommend question].