The surface of the U-shaped tube bundle is damaged, mainly from the wear and corrosion of the medium, and it is easy to cause the workpiece to fail under the action of long-term operation, so it needs to be replaced or surface strengthened.
The surface of the U-shaped tube with surface damage is strengthened, and the working conditions and surface damage of the workpiece are comprehensively analyzed, and the tungsten carbide coating can be sprayed on the surface by supersonic spraying technology to prepare a high and light anti-corrosion and wear-resistant metal coating.
As one of the effective technologies for surface modification in the field of surface engineering, thermal spraying technology is a method in which the spraying material is heated to a plastic or softened state inside or outside the spraying gun, and then sprayed on the surface of the pretreated substrate to form a coating in an unmelted state. Special functions are given to the substrate surface by means of thermal spraying.
Tungsten carbide coating is one of the commonly used thermal spraying materials, which is a compound composed of tungsten and carbon, with similar hardness to diamond, relatively high hardness, and is a good conductor of electricity and heat. In addition, tungsten carbide is chemically stable, so it also has good corrosion protection properties. Therefore, spraying tungsten carbide on the surface of the U-shaped tube can effectively improve its surface strength and prolong its service life.