Research Article
Hot Corrosion Behaviour of Detonation Gun Sprayed Stellite-6 and Stellite-21 Coating on Boiler Steel SAE 431 at 900°C
Table 1
Parameters used in detonation gun spray.
| Parameters | Stellite-6/-21 coating |
| Oxygen flow rate (O2) | 3120 SLPH | Pressure | 0.2 MPa | Acetylene flow rate (C2H2) | 2400 SLPH | Pressure | 0.14 MPa | Nitrogen flow rate (N2) | 1040 SLPH | Pressure | 0.4 MPa | Spray angle | 90° | Spray distance | 180 mm | Power | 450 VA | Fire rate | 1–10 Hz | Coating thickness (average) | 250 µm | Gun internal diameter | 22 mm | Length of gun | 1.5 m | Position of powder injector | 90° to the sample | Particle velocity | 600–900 m/s | Temperature of plasma | 3900°C |
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