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Other Functionalities

Other Functionalities

Create limitless functional surfaces with our coating and treatment solutions. Properties we are able to control and enhance include biocompatibility, antibonding, friction lining, and gas permeability.

Computational Alloy Development

Magnetism is a physical phenomenon of electric fields that result from the attraction and repulsion at an atomic level. For some applications, non-magnetism is critical, such as for oil and gas directional drilling equipment. Oerlikon Metco has developed some of the hardest surfaces available yet are non-magnetic with very low relative magnetic permeable that meet API (American Petroleum Institute) standards.

Coatings in which the thickness can be measured using a standard electromagnetic thickness gauge similar device are termed as ‘readable’. Coating thickness control, and therefore, readability is instrumental in providing effective protection in the power generation and waste-to-energy boilers and other applications using our Scoperta™ computational alloy development process, Oerlikon Metco has developed the only iron-based fully readable thermal spray alloy.

To better protect the environment, environmentally-friendly coatings, particularly those that do not release potentially carcinogenic hexavalent chromium into the environment, are required. Yet chromium is well-known for its ability to enhance corrosion resistance in many alloys. Using our Scoperta™ computational alloy development process, Oerlikon Metco has been able to create a new class of wear and corrosion resistant alloys that are free of chromium.

Biocompatibility

Determining compatibility with body tissue is a critical preliminary requirement for developing medical implants. The surface finish and the overall design of an implant are just as important for biocompatibility as the chemical composition. Use our coating solutions to ensure that both the physical and chemical characteristics of implants match the body tissues they are replacing.

Antibonding

We offer many different antibonding coating systems to suit specific applications. For example, thin film coatings applied to injection screws and molds combine wear resistance and antibonding properties. This improves mold filling, ejection from the mold, and surface finish.

Antibonding coating systems consist of a thermal-sprayed metallic or ceramic base coating, which is then over-coated with PolyTetraFluoroEthylene (PTFE). The wear resistance of the bottom layer provides better service life and durability over conventional PTFE coating. This type of coating system is used in the food, paper, printing, and packaging industries.

Friction linings

The latest compact and lightweight transmissions require improved friction linings. Components that employ friction linings include:

  • Synchronizers
  • Multidisk clutch assemblies
  • Transducer clutch assemblies
  • Gears

You can rely on Sulzer’s surface treatments to meet these components’ requirements for:

  • Constant frictional coefficients
  • Wear resistance
  • Oil-tolerant surfaces
  • Good overload behavior
  • Suitability for continuous slip applications

Permeability

Thermal-sprayed coatings always exhibit a certain amount of porosity. The gas permeability of the coating increases with higher porosity.

In metallic and ceramic coatings, the degree of porosity can be controlled. The coating must still remain structurally sound, and the porosity must be homogeneously distributed throughout the coating. 

Coating applications requiring a high amount of porosity control include:

  • Clearance control coatings (abradables)
  • Oxygen sensors for automotive engines, where a gas permeable coating is used to control the oxygen that reaches the sensing mechanism 
 
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