Through our suppliers and partners, we can offer you the opportunity to refine your components and workpieces in a wide variety of ways. WKK has built up an extensive network here and cultivates intensive cooperation, as it is often not only the refiner who has an influence on the quality of the surface coating. Our experience has shown that even in the manufacturing process, the use of the right punching oil or the application of the right cleaning methods can have a major influence on the ability to guarantee the layer adhesion of sheet metal parts. Due to the close cooperation we can guarantee fastest throughput times for external processing. This in turn is of great importance for you as a customer and buyer. The following procedures are examples of the methods we use:

• Nickel plating / chrome plating of parts made of steel, brass, stainless steel and copper
• Blue passivate
• Yellow passivate
• Pickling chrome steel
• Plant integrated PTFE or oil emulsion sealing (approx. 3-fold corrosion resistance as only passivated)
• electropolishing
• pickling
• passivation