What is grit blasting:

Grit blasting is a technique of abrasive cleaning or surface preparation using sharp particles. In this method, a surface is impacted at high velocity by hard, angular particles to such an extent that unwanted material on the surface is removed. The result is a clean, active metal surface that is ready for further treatment or evaluation.

Here are some key points about grit blasting:

  1. Purpose: Grit blasting is used to prepare surfaces for various purposes, including:
  1. Abrasive Materials: Commonly used abrasives in grit blasting include:
    • Garnet
    • Chilled Iron Grit
    • Steel Grit
    • Aluminium Oxide
    • Glass Beads
    • Crushed Glass

These abrasives effectively remove old coatings, mill scale, rust, heat scale, and contaminants from the substrate, creating a surface suitable for subsequent coating, lining, welding, or NDT / NDE.

  1. Methods:
    • Dry Blasting: Abrasive material is propelled by a stream of compressed air.
    • Wet Blasting: Abrasive material is mixed with water and propelled against the surface.

In summary, grit blasting is a powerful method for achieving a clean and well-prepared surface, especially when preparing components for inspection or protective treatments.


Why use grit blasting:

Grit blasting, also known as sandblasting, is a surface treatment method that involves abrading an object’s surface by directing a high stream of abrasive particles at it. Here are some key benefits of grit blasting:

  1. Effective Contaminant Removal: Grit blasting efficiently removes contaminants such as rust, dirt, and old paint from surfaces. It prepares the surface for further treatments like painting or coating.
  2. Gentle on Surfaces: Unlike some other abrasive methods, grit blasting is gentle enough not to damage most surfaces. It can even be used to clean delicate electronics and sensitive equipment.
  3. Efficient and Fast: Grit blasting is faster than traditional methods like sanding or wire brushing. It quickly prepares surfaces, making it ideal for industrial and commercial applications.
  4. Cost-Effective: The equipment needed for grit blasting is relatively inexpensive. Additionally, many types of abrasive media can be recovered and recycled, reducing costs.
  5. Versatility: Grit blasting can use various abrasive media, including organic substances like corn husks and inert materials like ceramics or crushed glass. The choice depends on the specific job requirements.

In summary, grit blasting offers an efficient, cost-effective, and versatile solution for surface preparation and cleaning in various industries. Whether restoring older vehicles or treating industrial components, grit blasting remains a standard approach due to its effectiveness.