Rusting is the common term for corrosion of elemental iron and its alloys such as steel. Many other metals undergo similar corrosion, but the resulting oxides are not commonly called "rust".
Rusting occurs when iron or its alloys are exposed to moist air. The oxygen and water in air react with the metal to form the hydrated oxide. The familiar red form of rust is (Fe 2 O 3), but iron has other oxidation states, so it can form other colors of rust.
Not all metals rust, and some that don’t can still corrode. Learn what rust is, which materials are affected, and how rusting is prevented.
Combustion is a complete oxidation of fuel at high temperatures. The hot gases resulted from the combustion process can be used for heating purposes or passes through generator to produce electricity.
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