Bluing is a corrosion preventive method based on chemical modification of the surface. Unlike galvanic coatings, there is no additional coating on the workpiece surface, neither are there any hardness nor dimensional changes of material. The long-term protection and better corrosion resistance are achieved by adding a special emulsion or oil on the workpiece surface after bluing. The process of bluing results also in a decorative black color but is not intended for extreme outdoor use. In such cases, we recommend the Plasox® protection.
