Sandblasting treatment

Application

Stainless steel polishing

Bonded abrasive tools

Abrasive coated tools

Wear-resistant flooring

Sandblasting treatment

Sandblasting treatment

Black corundum is a black aluminum oxide abrasive characterized by high hardness and toughness. It can be used for sandblasting surface treatment on a wide range of metallic and non-metallic materials, offering superior cost-effectiveness compared with conventional abrasives such as brown corundum and white corundum.

 

Core Features

Ingredients: α-Al₂O₃ (approximately 60%–65%), containing various components such as Fe₂O₃, SiO₂, and TiO₂, appears dark gray‑black.

Hardness: Mohs hardness: 8.5–9.0.

Resilience: Excellent, with strong resistance to breakage, it can be reused 3–5 times, resulting in low overall costs.

Environmental protection: It contains no free silica, produces minimal dust, and is safer for operators.

 

Applicable Scenarios

Heavy-duty rust removal: Removal of thick oxide scale from ships, bridges, and steel structures.

Surface roughening: Pre-treatment for spraying and electroplating to enhance coating adhesion.

Mold Cleaning: Remove carbon deposits and old paint films from the mold surface.

Non-metallic treatment: Matte finishes or etching on glass and stone.

 

Selection and Parameters

Goal

Recommended particle size

Barometric Pressure Reference

Note

Powerful rust removal

16#-60#

0.6-0.8MPa

High impact force, high surface roughness

General cleanup

80#-120#

0.4-0.6 MPa

Universal type, balancing efficiency and smoothness.

Fine Matte

150#-240#

0.3-0.5 MPa

For stainless steel and aluminum parts, to prevent scratches.

 

Precautions:

• Residue Prevention: After sandblasting, thorough cleaning is required to prevent black dust from becoming embedded in the surface, which could compromise electroplating or coating quality.

• Abrasive materials must be protected from moisture to prevent agglomeration and nozzle blockage.