The Most Effective Way of Surface Preparation: Sandblasting (Abrasive Blasting)
In industrial maintenance and production, preparing surfaces for the next process (painting, coating, etc.) is the most critical stage determining the application's lifespan. Sandblasting, or more technically abrasive blasting, is the most powerful and efficient method used in these surface preparation processes.
This process simply involves blasting special abrasive particles at high velocity onto the surface to be cleaned, using the power of compressed air. This powerful impact radically cleans all unwanted residues from the surface.
The main contaminants removed from the surface by sandblasting are:
- Rust and corrosion layers
- Old and blistered paint residues
- Oil, dirt, and other surface contaminants
- Burrs and welding marks left from metal production
3 Critical Properties Sought in Sand for Flawless Sandblasting
The quality, efficiency, and cost of the sandblasting process directly depend on the technical specifications of the abrasive used, i.e., the sand. Ideal blasting sand should clean the surface quickly with minimal waste and comply with environmental health standards.
The sand used for this purpose must have these three fundamental qualities:
- High Hardness: The hardness level of the sand (like on the Mohs scale) determines its power to remove rust and old paint. High-hardness sand does not shatter on impact with the surface; it expends its energy directly on cleaning.
- Being Natural Crushed Silica Sand: Specially sieved, angular, and sharp-structured natural crushed silica sand is preferred for this process. This structure maximizes the "scraping" effect.
- Being Dust-Free: It is essential that the blasting sand is washed and completely free of dust. Dusty sand both obstructs the operator's vision and creates serious health risks due to respirable dust (silica dust). Dust-free sand provides a cleaner working environment and clearer surface visibility.
