Liquid Fueled HVOF Coatings

Masking for Liquid Fueled HVOF Coatings - LF-HVOF coatings are used for applying very dense wear resistant coatings such as Tungsten Carbide and Chrome Carbide. Stainless steel as well as exotic blended alloys can also be sprayed.

Compared to gas fueled systems, the liquid fuel systems have higher velocities and higher energy so they tend to be the most challenging to mask against. This style of coating is commonly used for large industrial components. Common applications involve the resurfacing of pulp and paper rollers as well as the coating of landing gear. The deposition rates tend to be higher and the coatings are likely to have a higher density. PTFE Group offers partial solution masking options (tapes and compounds) for these applications.

Key Considerations: 

  • Size of Part to be Masked - Larger parts typically require a combination of materials including PTFE Group tapes and compounds. For smaller parts,  HVMC (High Velocity Masking Compound) may be all that is required.
  • Current masking strategy - When metal masking is being used, tape can provide a "buffer". If metal shadow masking is used, then tape can also be used to better define the coating lines.
  • Masking Holes - HVMC (High Velocity Masking Compound) is the only option.
  • Type of Material Being Sprayed - Carbides, due to their high abrasiveness, are the most challenging to mask.

Recommended Materials

For the application of LF-HVOF coatings, we recommend:

HVOF masking tape to be used in conjunction with sheet metal masking.

HVMC (High Velocity Masking Compound) to make LF-HVOF resistant moulds, caps, and plugs.