What is aluminium
anodising and it's
features?
Why our company chose this kind of product processing?
Aluminium anodising is an electrochemical process in which a layer of aluminium oxide is formed on the surface of a metal. The coating created during anodising is characterised by greater durability and corrosion resistance. That’s why it has a variety of applications.
Aluminium anodising process
Aluminium anodising is a process that has several stages. It begins with cleaning and degreasing the metal layer. Then the actual anodizing phase takes place. The aluminium element is immersed in an electrolyte bath through which an electric current flows. Aluminum serves as an anode in an electrical system, hence process is called Anodizing. The function of the electrolyte in this process is performed by a solution of sulfuric acid (sometimes also chromic or oxalic acid is used). A direct current of 12-20 V is most often used during this process. The formed oxide layer is almost invisible and has an uneven, porous structure. Such a surface enables the effective colouring of the coating.
​
Colouring is usually performed with the use of organic dyes. After this step next is so-called the sealing process in boiling water or the passivator. This treatment transforms the aluminum oxide into bemite and the aluminum surface becomes smooth and shiny.
Aluminium anodising applications
Thanks to anodising, aluminium gains several positive features, such as durability, resistance to corrosion and abrasion, and aesthetic appearance.
​
Importantly, elements made of this material do not require special maintenance. The anodised surface is distinguished by a durable gloss and is extremely pleasant to the touch.
Advantage of anodising
Anodising aluminium changes many properties that affect the appearance and function of the material. As a result of anodising aluminium profiles, a dirt-resistant surface is created and the corrosion resistance of the profiles increases. The surface is covered with an electrically insulated coating that provides a perfect metal finish. It is also pleasant in touch. Effectively improves parameters, conducive to processing and extending the durability of the finished product. During the anodising, the following features change surface structure (porosity facilitates colouring sheets with organic compounds), colour, corrosion resistance, hardness, abrasion resistance, light reflection and electrical insulation (resistance).
​
After anodising, the metal is even more resistant to weather conditions, even when dealing with acid rain. Its ageing is also delayed, which means that aluminium elements can be used for a much longer time, without having to replace them and generating additional costs.
​
The aesthetic aspect is also very important. If the surface of the aluminium is covered with an oxide layer, it does not attract dirt, and therefore it is much easier to keep it clean. In addition, the decorative anodising of aluminium makes the metal pleasant to touch, which further increases the comfort of use.
​
Anodised products do not contain substances from the Chemsec SIN List 2.1 (2015 version)
​
Quality certificates
-
ISO 9001 and 14001
-
Certificates of quality assurance of machining
-
ABS quality certificate