Powder coating is the most widespread method of surface coating and provides an almost limitless choice of colours with excellent repeatability of colour matching. ABL powder coats hundreds of thousands of aluminium extrusion components each year.
ABL’s commitment to a one stop shop includes the provision of a powder coat facility. Components of up to 6 metres can be powder coated with all RAL colours, including translucents, being available.
We powder coat aluminium extrusion, sheet, components, castings, flashings and pressings for a wide range of market sectors – many demanding the highest possible surface finish.
Powder coating utilizes an electrostatic process where the aluminium extrusion component is jigged onto the powder coat track using specialist jigs to hold the components, maximize throughput and also guarantee surface finish quality.
An electric current is passed through the component to attract the powder which is applied via a series of calibrated powder coat ‘guns’ to spray the component in a consistent and efficient manner. The powder is attracted to the electric charge passing through the component and wraps around the component to provide a smooth and consistent process.
Prior to the powder coat application, to ensure the right adhesion for the powder, it is vital that good pre-treatment to the aluminium extrusion component has taken place. As maximum powder application and adhesion are a prerequisite of a quality product, excellent pre-treatment is necessary. The pre-treatment consists of degreasing of the aluminium extrusion component, following by a chemical treatment. The chemical treatment provides good adhesion and effective corrosion resistance.
After powder coating, controlled curing, or stoving, through large ovens which are computer maintained to ensure an effective and efficient process, takes place. Once removed from the oven, the powder coated aluminium extrusion component will be ready for careful packing.
The powder coat thickness to the component is between 70 to 130 microns, depending on the powder utilized and the finish requirement.
ABL deals with the UK’s and Europe’s leading suppliers of powder, ensuring a huge range of different finishes can be provided and allowing us to hold the appropriate accreditation to coat using their powders under licence. Our pre-treatment process, typically alocrom 1200, is specified by the MOD and aerospace industries – showing the
exacting quality levels we meet on a consistent basis.
Quite often ABL will establish boundary samples with our clients so that there is clarity on what the surface finish of the final powder coated aluminium extrusion components should be.
Powder coating is applied and cured without the use of solvents which makes the process environmentally friendly and with no negative impact to air / ground quality.