An environmentally safe, electrochemical process that converts aluminum surfaces into a porous aluminum oxide, thereby creating an end product with a more durable and weather-resistant finish. Aluminum alloys are anodized to increase corrosion resistance, to increase surface hardness, and to allow dyeing (coloring) or improved adhesion for paints, primers and glues. Anodizing protects aluminum parts by making the surface much harder than ordinary aluminum. Anodizing uses simple water-based chemicals that can be treated easily and which release no harmful by-products. Liquid by-products are recycled and returned to the process. Solid by-products can be isolated and diverted for use in the manufacture of alum, baking powder, cosmetics, newsprint, fertilizer and water purification systems. Anodizing creates a by-product composed primarily of aluminum hydroxide, aluminum sulfate and water. These substances are harmless because they contain no significant amounts of heavy metals.
As relates to: http://www.anodizing.org/Anodizing/what_is_anodizing.html
Contributor: D. Schneider, Vista System