Effects of Aluminide and Platinum-Aluminide Coatings on the Hot Corrosion Behavior of MAR-M247 Nickel-Based Superalloy

Authors

I.K. Lee, *1 ),W.T. Tasi~(2),J.T. Lee~(2)(1. Missile and Rocket Systems Research Division, Chung-Shan Institute of Science & Technology,Taiwan,China;2. Department of Materials Engineering, Cheng-Kung University,Taiwan,China;

Abstract

This study is to investigate the high temperature hot corrosion behavior of aluminide coating and platinum-aluminide coating on Ni-base superalloy MAR-M247. On the platinum-aluminide, aluminide and the base metal, respectively, by the salt spraying method. The resistances to hot corrosion of platinum-aluminide coating, aluminide coating and the base metal were evaluated by the variations of weight gains. Aluminide and platinum-aluminide coating showed significanty beneficial effect on inhibiting the hot corrosion of MAR-M247. But that of the platinum-aluminide coating was even much better. The aluminide coating surface was composed of β-NiAl, and that of the platinum-aluminide coating was PtAl_(2). Both two phases could provide better resistances to hot corrosion than that of MAR-M247 in Na_(2)SO_(4), at 910℃.

Keywords

Nickel-based superalloy, Hot corrosion, Aluminide coating, Platinum-aluminide coating

DOI Link

https://doi.org/10.61558/2993-074X.1651

Publication Date

2005-08-28

Online Available Date

2005-08-28

Revised Date

2005-08-28

Received Date

2005-08-28

Recommended Citation

I.K. Lee. Effects of Aluminide and Platinum-Aluminide Coatings on the Hot Corrosion Behavior of MAR-M247 Nickel-Based Superalloy[J]. Journal of Electrochemistry, 2005 , 11(3): 262-270.
DOI: 10.61558/2993-074X.1651
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss3/5