Abstract
The electroplating and subsequent above-pack aluminisation were used to prepare a single-phase (Ni,Pt)Al coating on the second generation Ni-based single crystal superalloy. Corrosion behaviour of the (Ni,Pt)Al coating with and without pre-oxidation have been evaluated at1000 °C under simulated marine-environment. The results indicated that the pre-oxidised coating exhibited improved corrosion resistance compared with the one without pre-oxidation, due to the formation of stable and exclusive α-Al2O3 layer. The synergistic effect of NaCl and water vapour plus oxygen on the corrosion mechanism of (Ni,Pt)Al coating was intensively discussed.
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