What is Boiler Tube Coating?

Boiler Tube Coating is a must to increase the life of boiler tubes. The thermal spray gun on boiler tube coating technology to give high-temperature wear & corrosion protection coating on the boiler tubes. A broad type of coating materials such as mild steel or other metals or alloys is available. Therefore a proper coating can be utilized on the tubes to combat the specific queries without changing the tube material.

Thermal spray gun coating is a general name for a combination of processes in which a wire/powder is melted, either by fuel or electrical means, to its melting point, atomized by the usage of pressurized air & then moved onto the prepared component. The melted particles hit the prepared surface & fix instantly, create up layer upon layer to make a coating.

Applications Of Boiler Tube Coating

Boiler Tube Coating is a single-component water-based technology that can withstand temperatures of up to. Furthermore, Boiler tube coating material is an excellent way to avoid these issues while reaping numerous other benefits.

  • Superior adhesion : Boiler Tube Coating, enhanced by the unique micro-roughness of the protective coatings, can help resist the extreme physical, chemical, and thermal conditions found in a high-temperature environment.
  • Improved inspection : Boiler Tube Coating is also used as a wear indicator, which means that while the color of the boiler tube surface remains constant, the thickness of the substrate material beneath remains constant.
  • Power boiler performance monitoring : Without an insulation solution, the system loses a significant amount of power. Boiler Tube Coating can improve system efficiency by improving thermal management and heat transfer for lower FEGT ( The Furnace Exit Gas Temperature).
  • Ensure environmental safety : while the boiler system is operating, it may emit volatile organic compounds (VOCs) (compounds that have a high vapor pressure and low water solubility). Boiler Tube Coating is the ideal solution for reducing VOCs in the environment and protecting human health.

Process Of Boiler Tube Coating

Boiler Tube Coating Is Done By Two Processes Are Following :-

Arc Spray Gun

The arc spray gun process uses metal in wire feedstock supplies. Heating & melting happen when two electrically reversed charged wires, comprising the flame spray gun , are served together in such a way that a controlled arc happens at their crossing. The molten metal is atomized & propelled onto the processed workpiece by streams of compressed air.


Thermal spray gun processes called high-velocity oxy-fuel (HVOF Gun) spraying were developed. A mixture of gaseous & oxygen is fed into a combustion chamber, where they are burned & combusted continuously. The resultant hot gas at a pressure close to 0.99 MPA issues within a nozzle & expands through a reliable section. The fuels can be gases such as hydrogen, ethane, methane, propane, propylene, acetylene & natural gas, or liquids.


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