Combating Corrosion Degradation of Turbine Materials Using HVOF Sprayed 25% (Cr₃C₂-25(Ni20Cr)) + NiCrAlY Coating

Figure 8

Plot of (weight gain/area)² versus number of cycles for coated samples subjected to hot corrosion for 50 cycles in Na₂SO₄-50%V₂O₅ environment at 800°C. (a) Uncoated samples, (b) 25% (Cr₃C₂-25(Ni20Cr)) + NiCrAlY coated substrates. Multiplication factor for 𝐾_p=10⁻⁸ g² cm⁻⁴ s⁻¹).

(a)

(b)