# What type of weathering process is happening to materials when they rust?

May 31, 2018

Oxidation

#### Explanation:

Rust is the oxidation of iron. Iron combines with water and oxygen in the air to form rust. Rust is a mixture of iron oxides, such as $F {e}_{2} {O}_{3} \cdot n {H}_{2} O , F e O \left(O H\right) \cdot n {H}_{2} O$, and $F e {\left(O H\right)}_{3}$.

An example reaction for the oxidation of iron is:

$4 F e \left(s\right) + 3 {O}_{2} \left(g\right) + 6 {H}_{2} O \left(l\right) \to 2 F {e}_{2} {O}_{3} \cdot 3 {H}_{2} O \left(s\right)$

For the full set of redox reactions for rust and its explanation, visit: