'Anodized' means that a material such as aluminum, has been subjected to an electrolytic process, where natural oxidation has been controlled.
This involves immersing the aluminum in a chemical bath and applying an electrical current to it, causing oxide to be produced from the resulting rust on the aluminum. This layer of oxide hardens the aluminum and makes it resistant to corrosion.
'Hard anodized' is an extension of the process using higher voltage and lower temperature, which results in an even harder and more durable coating.
Anodized aluminum has many applications, including consumer products and industrial building materials. Because color can be applied to the oxide due to its porous nature, this durable, corrosion-resistant and lightweight material is also used in the manufacture of electronic equipment.
Anodised
Anodized aluminum is often used in the making of cookware, because it provides a very durable non-stick coating which is resistant to corrosion and salts, and has excellent heating and cooking abilities.
