Introduction
ARK 399 arc spray coating is an Fe-Cr-B alloy. It has excellent bond strength and it has high resistance against high temperature oxidation erosion wear due to its unique microstructure. Also, good corrosion resistance is among its features.
Main features
- High temperature oxidation erosion wear resistance
- High hardness and high wear resistance
- High bond strength, no primer. A 2 mm thick coating can be prepared
- Excellent corrosion resistance
- Cost-effective
Typical applications
- It is used for the spraying of CFBs and pulverized coal boilers
- Fan blades
- Steel converter hoods and flue ducts
- Oil drilling equipment
- Replacement of hard chrome plating
Chemical composition of deposited metal (%)
| C | Cr | Ni | B | Si | Other | Fe |
|---|---|---|---|---|---|---|
| <2.0 | <20.0 | <1.0 | <5.0 | <2.0 | <1.0 | Balance |
Mechanical properties
| Bond Strength (MPa) Acc. to ASTM C633-01 | Micro-hardness (HV 0.1) Kg/mm² |
|---|---|
| 55–57 (Low carbon steel substrate) | 916–1296 |
Coating properties
| Density (g/cm³) | % Prosity | % Deposition efficiency |
|---|---|---|
| 7.46 | <5 | 70–85 |
Recommended spraying parameters
| Diameter: in (mm) | Air pressure (MPa) | Current (A) | Voltage (V) |
|---|---|---|---|
| 1⁄16 (1.6) | 0.5–0.6 | 180–220 | 28–32 |
Diameters and packaging
| Diameter: in (mm) | Packaging: lb (kg) |
|---|---|
| 1⁄16 (1.6) | 27.5 (12.5) (Vacuum pack spool) |
Metallographic photos
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| Click here to download the datasheet for Kooben ARK 399. |
