This is also known as sandblasting, is a surface preparation technique that uses a high-pressure stream of abrasive material to clean, roughen, or smooth a surface. It’s commonly used before applying protective coatings to ensure optimal adhesion.

It has following Key Purposes:

* Remove rust, old paint, mill scale, or contaminants

* Achieve desired surface roughness/profile for coating adhesion

* Clean welds or surface defects

* Prepare surfaces to industry standards (e.g., SSPC, NACE, ISO)

There are different types of Abrasive Blasting:

Vapor Blasting

Abrasive Used :Low pressure, water + abrasive

Key Uses : Ideal for delicate surfaces                              

Dry Blasting

Abrasive Used : Garnet, steel grit, sand       

Key Uses : Heavy-duty cleaning of steel, concrete             

Wet Blasting

Abrasive Used: Abrasive + water              

Key Uses :  Reduces dust, used in sensitive environments          

Bead Blasting

Abrasive Used :Glass beads                   

Key Uses : Fine finish on stainless steel or aluminum              

Shot Blasting

Abrasive Used :Steel shot                    

Key Uses : Concrete surface prep, floor cleaning                

Soda Blasting

Abrasive Used : Sodium bicarbonate            

Key Uses : Gentle cleaning, often for graffiti or fire damage        

Surface Preparation Standards

These standards define the cleanliness and surface profile after blasting:

 

SSPC-SP10/NACE No. 2 – Near-white metal blast

SSPC-SP5/NACE No. 1– White metal blast (most thorough)

SSPC-SP6/NACE No. 3 – Commercial blast

SSPC-SP7/NACE No. 4– Brush-off blast (light cleaning)

ISO 8501-1 – International equivalent standards

Applications

* Steel bridges, tanks, ships

* Industrial flooring (concrete surface prep)

* Automotive and aerospace parts

* Petrochemical and marine structures

Surface Profile (Anchor Pattern)

* Measured in mils or microns (e.g., 2–3 mils or 50–75 µm)

* Affects coating adhesion; must match coating manufacturer’s recommendation

Safety & Environmental Considerations

* Proper PPE (respirators, suits, gloves)

* Dust control (containment, wet/vapor blasting)

* Compliance with OSHA and environmental regulations (e.g., silica exposure limits)

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