The purpose of pre-treatment is to prepare the product for painting and remove impurities. The stages and chemicals used in pre-treatment are selected based on the product’s intended use, material, and size. With our experience, we can quickly determine the type of pre-treatment required for each product. We pre-treat products in accordance with the SFS-EN ISO 12944 C1-C5-M standard for both indoor and outdoor applications.

If the product requires the removal of grease marks, chemical pre-treatment is initiated. The choice of chemicals can influence factors such as paint adhesion, corrosion resistance, electrical conductivity, or insulation properties. Chemical pre-treatment is performed by immersion, barrel line, or spray line. Immersion involves submerging the product in a chemical bath. In a barrel line, the product is first placed in a barrel and then submerged in a tank where the barrel rotates, allowing the chemical to adhere to the product in a spinning motion. In a spray line, the chemical is sprayed onto each separately suspended product.

Mechanical pre-treatment is carried out when necessary, following chemical pre-treatment. The aim of mechanical pre-treatment is to remove rust and impurities and provide a good surface for coating adhesion. Mechanical pre-treatment is done either by blasting or shot blasting. In blasting, cleaning grains are propelled onto the product using air pressure. Shot blasting is conducted in an enclosed cabinet where cleaning grains are projected onto the product’s surface using centrifugal force.

We are happy to discuss different options with our customers and share our expertise in pre-treatment and the chemicals used in the process.