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Coating Processes

The purpose of applying a coating may be decorative, functional, or both. The coating itself may be an all-over coating, completely covering the substrate, or it may only cover parts of the substrate. Functional coatings may be applied to change the surface properties of the substrate, such as adhesion, wetability, corrosion resistance, or wear resistance. In other cases, e.g. semiconductor device fabrication, the coating adds a completely new property such as a magnetic response or electrical conductivity and forms an essential part of the finished product.
A major consideration for most coating processes is that the coating is to be applied at a controlled thickness, and a number of different processes are in use to achieve this control, ranging from a simple brush for painting a wall, to some very expensive machinery applying coatings in the electronics industry.
Through our up-to-date machinery we can offer to the client four different coatings processes:  metallization, thermal spraying, plasma spraying, and HVOF. Common to each process is the aim of improving the surface properties of the substrate.
Materials used as a coating:
  • Carbides
Tungsten carbides, ensuring simultaneously a high hardness and lower porosity and roughness, are the most used ones. Of course, we are used to operating on a case-by-case basis, making proper assessments about materials and implementation techniques according to the client’s needs.  
  • Ceramics
Ceramic coatings usually meet needs belonging to sectors requiring a higher resistance to wear and corrosion, and where, at the same time, an elevated scrolling level is compulsory. All the existing types of ceramic coating may be applied to several industrial fields.  
  • Metals
Materials such as molybdenum, carbon steel, stainless steel, aluminium, as well as copper alloys may be employed within different industrial sectors to restore completely even the most severely worn elements.  
  • Stellite Alloys
The application of stellite-alloy-based coatings could yield elevated hardness levels coupled with, if necessary, greater thicknesses. These materials are especially used within the shipbuilding industry.