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We can handle all parts of the processing of your metal products and thus provide you with the fastest and most economical solution. We collaborate with the most skilled suppliers of surface treatment and offer to surface-treat any material – including large products and constructions.
Please contact us to get a quote for processing of your metal items. By leaving the entire process to us, you are guaranteed an efficient, time-saving and economical solution from drawing and construction to metal sheet processing, laser cutting and surface treatment of metal items and steel constructions.
Electroplating is a type of surface treatment of iron providing efficient protection against corrosion. It is therefore well-suited for iron items for outdoor use. Electroplating or zincing is the cheapest form of corrosion protection.
The metal item is cleaned in acidic and basic baths to remove any oil, grease or rust.
Electroplating is a mild, acidic zinc process through with a 12-16uM zinc layer is applied to the item using electricity. The item is treated using a 20 mm ball, and only the parts of the item accessible to the ball will meet the standards of galvanization. It is therefore not possible to galvanize items with bends or hollows.
The zinc needs to be protected against oxidation to prevent it from producing white rust. Therefore, a yellow or blue chromate passivation layer is applied to the item. This process is called chromatization.
Chromatization protects against corrosion and maintains the appearance of the zinc surface for shorter or longer periods, depending on the type of chromatization.
The item is placed in chemical baths to which no electricity is added, thus preserving the surface. This makes it more difficult for oxygen to corrode the zinc surface.
n order to further increase the durability of the item, a water-based acrylic lacquer may be applied subsequent to chromatisation.
Anodising is a method for surface-treating aluminium materials. Aluminium does not corrode, but is subject to a process of natural oxidation. This natural protection process can be imitated through anodising, also called anodic oxidation.
There are several advantages to anodising:
It increases the thickness and strength of the surface. The protective layer is a hundred times thicker than the natural layer and is thus more wear-resistant.
The surface becomes corrosion-resistant, dirt-repelling and electrically insulating. The anodising layer is transparent, making it possible to add structure or colour to the surface. It gives the surface a nice shine with depth in the colour.
The thickness of the anodising depends on the function and use context of the product. The table below is a guideline for the appropriate thickness of the anodising:
There are various forms of powder lacquering available, using different powders, different colours and a matt, skinny, metal or structure surface. The quality may be food approved, electrically conductive, an anti-graffiti powder, heat resistant, for interiors, for facades or a decorative powder.
Pre-treatment: The items are thoroughly washed down.Drying: Iron and steel are dried at a temperature of 125° C. Chromated aluminium is dried at a temperature of 90° C.Application of lacquer: The powder articles attach to the item in the same way as a magnet attaches to steel. The thickness of the powder layer is between 70 and 120 my.Tempering: Once the powder has been applied, the items are tempered for 10 minutes at 180-200° C, depending on the quality of the powder and the thickness of the items.
Chromium plating is used for corrosion protection, as a decorative coating and to create a wear-resistant and hard surface.
Several types of metal are suitable for chromium plating:
If you want a shiny surface, the item should be burnished and polished. The surface is typically coated with polished copper and polished nickel previous to chromium plating: The copper levels and smooths out the surface, while the nickel gives it a hard base. The nickel coating can be either shiny or matt.
The chromium and nickel coating functions as a barrier to the surroundings and should be fully sealed. The typical thickness of the layer is 2-12 μm, providing moderate protection. For outdoor use the thickness should be increased or a middle layer of copper should be added.
Wet lacquering is especially suitable for items that do not tolerate high temperatures or items that require extensive corrosion protection.
Some materials are well-suited for wet lacquering:
There are several advantages of wet lacquering:
We have painting booths for wet lacquering and are thus able to wet lacquer your items, so you only have to deal with one collaborator and one process. We use water-based types of lacquer for wet lacquering and focus on minimising the environmental impact hereof.
Metallising is a technique for surface-treating steel constructions not suited for hot zincing. This may include constructions that are too large for the zinc bath or types of steel not suited for hot zincing.
The constructions are cleaned through air blow cleaning. This gives the steel a rough surface, increasing the attachment, strength and life of the metallisation. Stainless steel and aluminium can with advantage be air blow cleaned.
During metallising zinc is applied to the construction using an electric arc, as with spray painting. This is done at 5,500° C.
A limitation of metallising is that it requires physical access to the construction throughout the process. On the other hand, it is possible to apply the zinc in the required thickness. As opposed to hot zincing, metallising involves no reaction between the metals or metallic attachment of zinc to steel.
Following metallising, the construction may be painted, increasing its protection against corrosion
Hot dip galvanizing is the most efficient form of corrosion protection available and requires no maintenance. The zinc coating provides cathodic protection of the steel. The process of hot dip galvanizing involves a reaction between the two metals, creating an alloy of these metals. This secures a very strong attachment of the zinc to the steel. The alloy is so strong that the steel construction can be transported and handled without damaging the zinc coating.
The long life of hot dip galvanized steel makes hot dip galvanizing an eco-friendly surface treatment.