1. Product Advantages
Aerospace parts are made of titanium alloy, nickel-based superalloy, aviation aluminum and stainless steel. Even tiny iron impurities will cause corrosion, coating peeling and anodizing failure. Therefore, high-purity white fused alumina is the only qualified blasting abrasive for aerospace applications.
- Ultra-high purity & zero iron pollution: Al₂O₃ ≥99.5%, Fe₂O₃ ≤0.05%, TiO₂ ≤0.1%. No iron or titanium residue to damage high-precision aerospace substrates.
- Stable chemical performance: Acid and alkali resistant, chemically inert on metal surfaces. No embedded corrosive residue after blasting, ideal for pre-treatment before thermal spraying, electroplating and anodizing.
- High hardness & good reusability: Mohs hardness 9.0–9.2 with sharp self-sharpening grains. Efficient for oxide removal and deburring. Recyclable for 150–220 times with low consumption.
- Safe & dust-free hazard: No free silica, fully compliant with aerospace workshop safety standards.
2. Compliance Standards
Our aerospace-grade white fused alumina meets global aviation industry specifications:
- International: AMS 2431/9, EN 4637, MIL-A-22262
- Domestic: GB/T 2479-2022 (Aerospace enhanced version)
Each batch is supplied with complete MTR inspection reports.
3. Core Technical Indexes
Composition | Aerospace Grade | Ordinary Industrial Grade |
|---|---|---|
Al₂O₃ | ≥99.5% | ≥99.0% |
Fe₂O₃ | ≤0.05% | ≤0.10% |
TiO₂ | ≤0.10% | ≤0.30% |
SiO₂ | ≤0.10% | ≤0.20% |
Na₂O | ≤0.30% | ≤0.40% |
Magnetic Matter | ≤0.003% | ≤0.01% |
4. Particle Size Selection & Applications
- F30 / F46 (Coarse blasting): Strong cutting force, for removing thick oxide scale and weld slag on engine casings and landing gear forgings. Surface roughness: Ra 25–50 μm.
- F60 / F80 (Most popular aerospace grade): For precision deburring and uniform surface roughening. Suitable for turbine blades, titanium parts and valve components. Ideal pre-treatment for coating, plating and oxidation. Roughness: Ra 10–25 μm.
- F120 / F150 / F220 / F280 (Fine micro-blasting): For thin-wall parts, sealing surfaces and component renovation. Removes fatigue layers without damaging substrates. Roughness: Ra 3–10 μm.
- F400–F800 (Ultra-fine): For ultra-smooth matte finishing of precision aviation instruments, roughness Ra ＜2 μm.
5. Typical Application Scenarios
- Aero engine parts: Remove high-temperature oxide and corrosion for thermal barrier coating preparation.
- Landing gear systems: Remove forging scale and improve electroplating adhesion.
- Aircraft aluminum structures: Uniform surface finishing before anodizing.
- Aviation hydraulic & valve parts: Zero iron contamination to avoid internal corrosion.
- Aerospace maintenance & remanufacturing: Remove old coatings and fatigue layers for part repair.
6. Quality & Usage Control
- All abrasives are magnetically separated and screened to eliminate iron impurities; mixing with other abrasives is forbidden to avoid cross contamination.
- Recycled grains are regularly sieved to remove fine powder and prevent surface embedding.
- Dedicated blasting equipment is required for aerospace precision parts.
- Full batch testing and MTR documents are provided for customer inspection.
7. Product Comparison
- Brown fused alumina: Brown alumina contains high iron and titanium, not allowed for aerospace production.
- Glass beads: Only for soft matte finishing, no enough cutting force for oxide removal and coating roughening.
- VS Garnet: Easy residue embedding on titanium surfaces, not applicable for precision aerospace components.