Anodized aluminum cookware is an upgraded version of aluminum cookware. When aluminum is placed in an acid solution and exposed to an electric current, a layer of aluminum oxide is deposited on the surface of the aluminum. This process is called anodization Anodized. aluminum cookware conducts heat as well as ordinal aluminum, but has a hard, non- stick surface which makes it scratch-resistant, durable, and easy to clean. Anodization also reduces leaching of aluminum from cookware into foods, particularly acidic foods like tomatoes and rhubarb.