We tend to use a powder coating process on metal. This process allows you to choose from a wide range of finish options in terms of colour, texture effect and gloss level.
In specific cases, we first apply a conversion coat to ensure corrosion resistance at the start of the process. This is not always necessary as an anti-corrosion coat is often already present after the previous electrocoating treatment (KTL). We then electrostatically apply the powder to the parts with automatic powder guns. This method has the advantage that 70% to 80% of what we paint effectively ends up on the parts. After the curing process, the powder forms the metal part’s top coat of paint. The applied coat can serve as a primer or a final finish.
The used powders are based on epoxy, polyester or acrylic technology. Epoxy and polyester are common powders we often apply to parts that are not visible, such as truck chassis parts. These powder coatings offer excellent protection and we apply them to parts that need to meet high physical requirements. We always use epoxy as a primer before further wet painting processes.
Most Alro finishes are polyester-based , except for specific parts that require a high depth gloss finish and scratch resistance. In that case, we use acrylic powder that meets high visual requirements. We mainly use acrylic powder to give a vehicle’s exterior metal window trims a piano black high-gloss finish.
Once the powder coating has cured in the furnace, the products are taken from the conveyor system. The final step in powder coating is also quality control and the packaging of the parts.