Brown Fused Aluminum Oxide (BFA) Blasting Abrasives
Brown fused aluminum oxide is a high-hardness synthetic abrasive, manufactured from bauxite smelted in an electric arc furnace at ultra-high temperature. It is the most widely used and cost-effective blasting abrasive for industrial surface treatment.
| Chemical Properties (% wt) | Item | Typical | Min | Max |
| Al2O3 | 95.50 | 95.50 | 96.00 | |
| Fe2O3 | 0.15 | – | 0.30 | |
| SiO2 | 0.88 | – | 1.20 | |
| TiO2 | 2.70 | 2.50 | 3.20 | |
| Physical Properties(% wt) | Magnetics | 0.03 | – | 0.05 |
| Moisture | 0.05 | – | 0.20 | |
| Hardness | 2090 Knoop | 9 Mohs | – | |
| Grain form | Angular-cubic | |||
| Bulk density g/cm3 | 3.94 | 3.90 | – | |
| Grit sizes | A full range of size from # 10 to # 320 TO ANSI,ISO and FEPA specifications | |||
| Packing | In 1,000-1,500 kilos super sacks,or 25 kilos paper bags Special quantity packaging and labeling available. | |||
Key Properties
- Main composition: Alumina (Al₂O₃ ≥ 95%), with small amounts of TiO₂, Fe₂O₃ and SiO₂
- Hardness: Mohs hardness 9, excellent cutting performance
- Particle shape: Angular, sharp polyhedral grains with good self-sharpening ability
- Features: High toughness, low dust, reusable, low consumption, chemical stability
Advantages for Blasting
- Powerful cleaning: Removes rust, mill scale, old paint, welding slag and oxide layers efficiently
- Uniform surface profile: Creates ideal anchor patterns to improve coating adhesion for painting & spraying
- Economical & eco-friendly: Recyclable for 5–10 cycles; much less dust than silica sand and slag abrasives
- Wide compatibility: Suitable for dry & wet blasting, manual & automatic blast rooms
Typical Applications
- Surface preparation for steel structures, ships, bridges, pipelines (rust removal & descaling)
- Pre-blasting for automotive, aerospace and wind power parts before coating
- Deburring, matting and finishing for stainless steel, aluminum alloy, glass and stone
- Cleaning weld seams and heat-affected zones after welding
Difference vs White Fused Aluminum Oxide
- Brown Fused Alumina: Higher toughness, lower cost; ideal for carbon steel and general ferrous metal blasting
- White Fused Alumina: Higher purity (Al₂O₃＞99%), iron-free contamination; for precision parts, stainless steel and non-ferrous metals