Boiler tube coating attempts to provide reasonable protection of the furnace tube from damaging surface effects. In this article, we will learn about the most effective current coating methods and how VIVABLAST performs boiler tube repair & coating for clients.
In order to fully convey the information to you, this article will go through the following contents:
Boiler tube coating is a method of forming a corrosion protective coating on the outside of the furnace tube by altering the material’s surface properties. When the furnace tube is coated with anti-corrosion coating, its surface will possess corrosion resistance properties from the spray coating components.
The coating will help protect boiler tubes from problems related to corrosion, wear, chemical attack, slag, thermal wear, or hysteresis. Above is all the damage that boiler pipes face when placed in harsh environments, plus high working capacity for a long time.
Moreover, when properly coated, tubes can increase their durability and extend their service life, helping to reduce maintenance, repair, or replacement costs. Less damaged boiler tubes also help limit losses due to system downtime for maintenance and repair.
When it comes to boiler tube coating, there are four most widely-applied methods, including:
Thermal spray coating (metal coating/metalization) converts a solid material in powder form, wire, rod, or drug core into a stream of high-energy material such as a combustible gas or a plasma stream, thereby melting the material. The material, after melting, will disperse in the form of a fine mist and be pushed to the surface to be coated at high speed, forming a protective coating.
Coating the boiler tube by thermal spray method is popular thanks to the following outstanding advantages:
The HVOF tungsten carbide thermal injection process creates extreme kinetic energy into the powder particles. When these energetic particles collide with the substrate, their velocities turn to zero, and they absorb kinetic energy, causing them to bond with the embryo immediately. After that, a coating is quickly formed. Thanks to this unique operating principle, the tungsten carbide coating has an exceptional thickness and good adhesion.
The main advantages of this coating technology are:
High-velocity oxygen fuel (HVOF) coating, invented in the 1980s, is the term for the process of mixing liquid fuel and oxygen, which is then injected into the combustion chamber and ignited. The gas mixture carries high temperature and pressure and is sprayed at supersonic speed, and hot air and powder are directed towards the coated surface. The finish coating is a thick, low-porous, and highly bonding coating.
Some advantages that make HVOF an effective boiler tube coating method:
Arc wire spraying (double arc/thermal arc spraying) is a method of using an electric arc to melt a conductor. The arc spray system works on the “push” or “push/pull” principle.
Some advantages of boiler tube coating by arc wire system:
One of the four coating methods mentioned above, VIVABLAST’s strength lies in the thermal spray technique’s first method. Our service portfolio covers metal coating/plating such as Thermal Spray Aluminum (TSA) / Zinc (TSZ) / other metal alloys. Our coating solutions can serve many different industries, including boiler tube coating. Why does VIVABLAST choose to offer clients with the thermal spray coating? Because this is considered a simple solution, optimal in terms of time and cost, this method is also compatible with many different substrate materials.
Our thermal spray service will be an ideal choice for the following types of surfaces:
What clients can get when they trust and choose to work on the boiler tube repair & coating project with VIVABLAST:
Before concluding this article, we hope to provide you with practical and valuable information about the importance of boiler tube coating and the most efficient coating methods. If you are looking for a company that specializes in offering boiler tube protection solutions with optimal quality and cost, please don’t hesitate to get in touch with VIVABLAST via: