The Advantages of High-Velocity Oxygen Fuel Thermal Spray Coating

What is HVOF spraying?

High-velocity oxygen fuel (HVOF) spraying is a thermal spray coating process that uses a supersonic stream of gas to deliver metallic, ceramic, or composite material to a surface. The material is typically in the form of powder or wire. The high velocity of the gas stream accelerates the particles of coating material so much that they deform and flatten almost completely upon impact with the target surface. In other words, HVOF spraying is less dependent upon heat to melt and soften coating material and more dependent upon speed and energy to hammer it into the target surface.

Advantages of HVOF spraying include:

Higher durability

HVOF spray coatings are known for their durability. The dense structure of the coating helps to resist wear and tear, and the lack of porosity makes it less likely to chip or flake off. This makes HVOF coatings an ideal choice for high-wear applications such as turbine engine components, centrifuges, and pumps. In addition, the dense structure of the coating also provides good corrosion resistance. This is due to the fact that dense coatings provide fewer porous pathways for corrosive elements to attack the substrate. For these reasons, HVOF coatings are often used in applications where corrosion resistance is critical, such as in offshore oil exploration, chemical processing, and refinery environments.

Better Bond to Substrate

HVOF coatings have a substantially higher bond to the substrate than traditional thermal spray coatings, sometimes as much as double the bond strength. This is due to the fact that the high velocity of the gas stream maximizes surface contact of deposited particles with the substrate. This develops a strong physical bond between the coating and the substrate, and helps to improve the durability of the coating.

In addition, the bond between the coating and the substrate is less likely to be damaged by thermal cycling or vibration. This makes HVOF coatings an ideal choice for components that are subject to high temperatures or extreme temperature changes.

Flexible Applications

HVOF coatings can be customized to meet the specific needs of many applications. Commonly sprayed materials include metal superalloys and carbides. The HVOF thermal spray process is best used to apply hard materials, including wear-resistant coatings, corrosion-resistant coatings, and non-galling protection.

Smooth & Consistent Surface Finish

HVOF thermal spray coatings are distinguished by their smooth and consistent surface finish, even in the as-sprayed condition. This characteristic makes HVOF coatings ideal for a variety of applications where a smooth surface is critical, such as in bearings and turbine blades. The lack of surface irregularities also gives HVOF coatings superior wear resistance, making them ideal for high-stress environments. The density of these coatings also enables them to be ground to much finer finishes than more conventional thermal spray coatings.

HVOF Provides Unparalleled Benefits

HVOF Thermal Spray Coating is an advanced coating technology that offers a number of benefits over traditional coating methods. The high-velocity, oxygen-fuel spray provides a dense, well-bonded coating that is resistant to wear and abrasion. HVOF coatings can be applied quickly and easily to complex shapes, making them ideal for challenging surface shapes. The resulting finish is also extremely smooth and consistent, providing superior protection against corrosion and pitting. Overall, HVOF Thermal Spray Coating can provide unparalleled benefits in terms of durability, performance, and aesthetics.



About Hayden Corp.

Hayden Corp has over 100 years of experience in the thermal spray industry, and our team of thermal spray experts can help you identify the right coating solution for your needs. We offer a wide range of thermal spray coatings, including HVOF coatings, and our team is available to help find the perfect solution for your needs. Contact us today to learn more about our thermal spray solutions!