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What Is Grit Blasting and What Is It Used For?

Abrasive particles are accelerated and slammed against a surface using a technique known as grit blasting. High-speed abrasive particles clean the surface and prepare it for a future finishing process.

For example, grit may reduce stress corrosion cracking in aluminum alloys by compressing the metal’s surface layer when it comes into contact with it.

How Grit Blasting Works

Grit blasting is a method of surface preparation or abrasive cleaning that employs sharp particles. Hard, angular particles are used in this method to contact the surface at high speed, which removes any undesired material from the surface and reveals the active metal behind the clean layer. You can remove a wide variety of surface coatings and stains with this technique.

There is a lot of abrasiveness in grit. In this process, particles such as:

  • The shells of walnuts
  • Sands of varying hues
  • Silicon carbide
  • Alumina
  • Particles of Emery
  • You may use these methods to get your particles moving:
  • pressurized air
  • Streams of liquid
  • Emanations of heat.

Inventions of mechanically generated projections

Grit blasting simultaneously accomplishes a number of tasks. Mill scale, rust, old paint, and other impurities may be removed by blast cleaning. However, oil and grease should be removed first before cleaning. For example, it is used to remove sand and scale from castings during the fettling process, as well as for the dressing of stamped and billets.

Prior to welding (removing scale, rust or paint), and following (enhancing the adherence of coatings), it is often utilized (such as painting or galvanizing). None of the sand, bead, or shot blasting methods were used. As with grit blasting, the surface prepared by blasting operations like this one is appropriate for the subsequent application of a protective coating. A thin film of iron oxide will form on the welded surfaces of even the brightest steel, and coatings will not stick to the oxide formed on the laser-or flame-cut edges.

In order to create a more usable surface, grit blasting creates little peaks and valleys on the ground. Grit has bent over the peaks, leaving little hooks in their surfaces as a result of the frequent impact. That’s because grit blasting has a different impact than wire brushing, sanding, or even chemical treatment.

Technologies in Grit blasting

Metal surfaces may be cleaned and stripped using a variety of methods, including Grit blasting robot, abrasive blasting and ultrahigh-pressure water-jetting. In the past century, abrasive blasting has been extensively used in the construction industry. (Have a look on our website)

An air-based high-pressure jet sprays microscopic particles of sand or metal onto the surface at very fast speeds to clean the hull of a ship, sandblasting or gritblasting. There are several advantages to using this method, including its ability to remove any coating that may be on the surface as well as its ability to achieve a desired texture level.