Alternatives to Functional Hexavalent Chromium Coatings: HVOF Thermal Spray

摘要

High Velocity Oxy-Fuel thermal spray is a clean, dry-coating method that has become the technology of choice for replacing engineering hard chrome in the aircraft industry. It is a harder coating that typically gives about three times the wear life of hard chrome. It is particularly effective for hydraulic systems and for building up thick repair coatings on large items. However, it cannot be used in many non-line-of-sight areas, and because it is a spray rather than a bath technology, its cost factors are significantly different from most plating methods. This paper describes the technology, its quality and performance, capabilities and limitations, and its costs.