High-temperature corrosion behaviour of Pt-modified aluminide coating with solid NaCl deposit in O2 + 10 vol% H2O and the influence of pre-oxidation treatment

Y.Y Li,D Huang,C.Y Zhang,S Li,Z.B Bao,S.L Zhu,F.H Wang

doi:10.1016/j.corsci.2022.110421

High-temperature corrosion behaviour of Pt-modified aluminide coating with solid NaCl deposit in O2 + 10 vol% H2O and the influence of pre-oxidation treatment

Y.Y Li, D Huang + Show 5 more

https://doi.org/10.1016/j.corsci.2022.110421

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Journal: Corrosion Science	Publication Date: Jun 7, 2022
Citations: 2

Affiliation: University of Science and Technology of China, Chinese Academy of Sciences, Northeastern University

#Synergistic Effect Of NaCl #Solid NaCl Deposit + Show 8 more

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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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