Combustion spraying

Combustion spraying is a thermal spray coating process used to apply relatively inexpensive coatings that typically contain high levels of oxides and porosity together, with the option of achieving a rough surface finish.

In the combustion spraying process, a gas stream produced by the chemical reaction between oxygen and a combustion fuel heats a consumable propelling it onto a substrate to form a surface coating.

As the surface technology specialist in combustion spraying, Bodycote provides an array of spray coating materials to suit your specific needs. Backed by a customer-driven service, our facilities process a wide variety of component sizes to exacting standards with reliable, repeatable results.

Benefits

Combustion spray coatings offer the following benefits:

• Corrosion protection;
• Wear resistance
• Clearance control – abrasives and abradables;
• Heat and oxidation resistance;
• Temperature management; and
• Electrical resistivity and conductivity.

Application & materials

Typical applications include:

• Pump shafts/journals
• Seal areas
• Impellors
• Housings
• Structures
• Metallics, ceramics, abradables

Process details

Combustion spraying offers a cost effective alternative for applying metallic and ceramic coatings in a less demanding environment.

The process relies on the chemical reaction between oxygen and a fuel of combustion to produce a heat source. The heat source creates a gas stream with a temperature in excess of 3,000°C with correctly balanced conditions between oxygen and acetylene. A consumable, usually a powder or wire, is heated and propelled onto a substrate to form a surface coating.