Aluminium has an excellent appearance and is corrosion resistant by nature. However, in order to improve the corrosion protection and other properties of aluminium, we use various types of surface treatment. With certain methods, the following properties can be influenced:
Our principally used surface treatment methods to optimize the aluminium product are anodizing, powder coating and wet painting. All three types seal and protect the extruded aluminium profile and give a wide selection of color options with varied sheen and excellent consistency. Surface treatment also often includes pre- and post-methods such as etching, polishing, blasting, grinding, wrapping and printing.
When surface treatment is required, Hydro has a range of solutions which ultimately strengthen the advantages of aluminium and provide an attractive finish. With a more durable and long-lasting product, the need for replacement is reduced. This has positive environmental implications.
Anodizing has a comprehensive list of benefits and is the surface treatment method we most frequently use. Our in-house anodizing lines allow for a "one-stop shop" with short lead times when purchasing your aluminium profiles and components with a quality-assured finish.
Anodizing is a process in which the outer surface of an aluminium profile is converted into aluminium oxide, a ceramic with unique properties, which is used to create a permanent new appearance. With anodizing, the oxide layer on the surface of the aluminium is made during an electrochemical process. The natural aluminium color can be maintained, but a variety of other colors are also available.
Anodizing is one of the oldest and more sustainable surface treatments of aluminium. Its main advantages are:
Anodizing is used as a pre-treatment for powder coating as well, with the pre-anodization layer guaranteeing an extra-durable conversion layer for the final coating layer.
During the powder coating process, a free-flowing dry powder is electrostatically applied to add color or finishing effects. It is then cured via heat treatment or UV lights. The advantages of powder coating lie in the combination matrix of color, function, gloss and corrosion properties.
Some of the key benefits of powder coating are:
Wet painting can produce a wide range of liquid color paint and is ideal for products that demand a thin finish. Wet-blasting liquid paint is sprayed onto the surface to an even thickness of approximately 15-20 micrometers. Common applications of wet paint include automotive exterior components with high glosses and interior parts with multiple functions, furniture and general industrial applications.
The main advantages of aluminium wet painting are: