There are various processes that metals go through when they need to be aesthetically pleasing. Anodising is one of those processes that works for aluminium. Aluminium items go through anodising to improve their durability, quality, and colour stability. The process of anodising aluminium involves the use of an electrical current to form aluminium oxide, which is the surface film of the end product.
The use of negative and positive charges converts molecules into an anodic layer. The concentration of the electrolytes is one of the factors that will affect the quality of the film that forms after the process, which then results in an enhanced metal with an aesthetically pleasing finish with properties that architects use for different applications.