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Hardfacing

Last updated: June 2, 2018

What Does Hardfacing Mean?

Hardfacing refers to a coating technique that involves welding a more corrosion and wear resistant material onto the surface of a less durable metal. The process may be performed prior to the use of the substrate metal or periodically as maintenance.

Hardfacing is also known as hardsurfacing.

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Corrosionpedia Explains Hardfacing

Hardfacing is generally performed using three different techniques:

  1. Thermal spraying involves the application of a protective coating of a thickness less than or equal to 0.3 mm. It involves minimal thermal temperature variations.
  2. Spray fusing involves applying self-fluxing overlay coatings. It makes use of the Ni-Cr-B-Si-C alloy system and can be applied across a wide range of temperatures.
  3. Weld hardfacing involves the application of a protective coating of a thickness greater than 1 mm. It involves dense layers and high bond strength.
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Synonyms

Hardsurfacing

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Tags

FabricatorsHardness FactorCorrosionPreventative CoatingsSurface ModificationProceduresMetallic and Ceramic CoatingsCorrosion Prevention SubstanceApplication Methods Abrasion ProtectionMaterial ModificationGeneral Procedures

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