Anóðun

Anóðun is a Norwegian term referring to the process of anodizing, an electrochemical process used to increase the thickness of the natural oxide layer on the surface of metal parts. This oxide layer is formed by an electrochemical bath. Anodizing is an electrolytic passivation process that intentionally grows a thicker, more durable oxide layer than is naturally formed. The most common application is for aluminum alloys, though other metals like titanium and magnesium can also be anodized.

The primary purpose of anodizing is to improve the corrosion resistance, wear resistance, and surface hardness of the metal. It can also be used for aesthetic purposes, as the oxide layer can be dyed in various colors. The process involves immersing the metal part in an electrolyte solution, typically sulfuric acid, and passing an electric current through it. The metal part acts as the anode, and the electrolyte conducts ions that react with the metal's surface to form an oxide layer.

The thickness and properties of the oxide layer can be controlled by varying parameters such as current density, temperature, and the concentration of the electrolyte. Anodized surfaces are often porous, which allows for subsequent dyeing or sealing processes. Anodizing is widely used in industries such as aerospace, automotive, construction, and consumer electronics due to its ability to enhance the performance and appearance of metal components.