Alumina Coating Ceramic is also called as Wear SHS-Self-Propagating Alumina Ceramic create a new generation of abrasion and corrosion resistant engineering pipeline.
The composite pipe is composed of three layers: Alumina ceramic, intermediate, and steel layers.
The ceramic layer is formed by molten alumina at a high temperature. The molten alumina produced from the reaction Fe2O3+2Al=2Fe+Al2O3 spreads on the inside wall of the steel pipe under the influence of a centrifugal force, then solidifies, so the ceramic layer has high density and smooth surface and bonds to the steel pipe.
Applicable Industries:
- Pipe need excellent wear resistance property: Power plant, Mining, Sea Port, Coal Plant, And pipe for transporting the powder, slurry, sand 。
- Coal washing plant, pipe for transporting coal and other
- Pipe for transporting the melted
- Any pipe which need wear protection, corrosion protection
Properties: Alumina Ceramics
| Ceramic Material | Alumina Ceramic (α-Al₂O₃) |
| Alumina Purity | α-Al₂O₃ ≥ 95% |
| Density | 3.65 – 3.80 g/cm³ (Typical ≥ 3.50 g/cm³) |
| Porosity | < 0.5%, free of continuous pores and honeycomb defects |
| Lining Thickness – Straight Pipe | 2.5 – 4 mm |
| Lining Thickness – Elbow | ≥ 4 mm up to 8 mm |
| Thickness Tolerance | ±1 mm/m (axial), ±0.8 mm (radial) |
| Vickers Hardness | HV 1100 – 1500 |
| Mohs Hardness | 9 |
| Rockwell Hardness | HRA ≥ 80 |
Mechanical Properties
| Bonding Method | Metallurgical Bonding |
| Transition Layer Thickness | 0.5 – 1.0 mm |
| Crushing Strength | ≥ 370 MPa |
| Shear Bond Strength | 18.7 – 26.8 MPa (Minimum acceptable: ≥ 15 MPa) |
| Flexural Strength | ≥ 290 MPa |
| Fracture Toughness | ≥ 4.8 MPa·m^1/2 |
| Compressive Strength | ≥ 850 MPa |
| Elastic Modulus | 277 GPa |
| Outer Steel Pipe Material | ASTM A53 / Equivalent 20# Seamless Carbon Steel Pipe |
| Yield Strength of Steel Pipe | ≥ 245 MPa |
| Steel Pipe Wall Thickness | 6 – 12 mm |
Thermal Properties
| Continuous Service Temperature | -50°C to 700°C |
| Maximum Short-Term Service Temperature | 900°C |
| Coefficient of Thermal Expansion | 7.2 × 10⁻⁶ /°C |
| Thermal Conductivity | 20 W/(m·K) |
| Peak Reaction Temperature During Manufacturing | 2200 – 2500°C |
| Centrifugal Casting Speed | 1200 – 1500 rpm |
Key Benefits
- Excellent wear resistance
Alumina content of the ceramic liner is higher than 95%, with hardness HV 1000-1500. The wear protection performance is more than 10 times better than carbon steel after quenching. - Excellent corrosion resistance, with stable chemical properties.
- Excellent thermal resistance performance, up to 2000°C, and can be used in the range from -50°C to 900°C for long periods.
- Easy installation — can be connected with other pipes by welding, flange, and soft fast connecting.
For further information, you can contact our Sales Engineer, or you can contact us directly or here.