Hot Corrosion Behaviour of Detonation Gun Sprayed Al₂O₃-40TiO₂ Coating on Nickel Based Superalloys at 900°C

Table 4

Parabolic rate constant (𝐾_𝑝) for the Al₂O₃-40TiO₂ coated and uncoated Superni 718 and AE 435 superalloys.

Substrate	𝐾𝑝 Values (×10^−10 g^2 cm^−4 s^−1)
Superni 718	66.376
Coated Superni 718	39.443
AE 435	28.995
Coated AE 435	6.7245