NDLI: The Protection of Aluminides by Alloying with Molybdenum in High Chlorine Containing Atmospheres at 1,000 °C

Content Provider	Springer Nature Link
Author	Galetz, Mathias C. Rammer, Barbara Schütze, Michael
Copyright Year	2013
Abstract	Nickel aluminides are widely employed as coatings to enhance the oxidation resistance of alloys at high temperatures. However, some modern processes require the use of extremely high levels of chlorine in the process gas. This evokes a type of attack that no classical coating system can withstand. Nickel aluminide with molybdenum addition has been reported to be a potential candidate material before, but the corrosion mechanism of this system has not yet been investigated. To evaluate the influence of the molybdenum content on the corrosion behavior of NiAl, coupons were manufactured using an arc-melting process. The degradation mechanisms of these samples in synthetic air with 10 % chlorine gas at 1,000 °C are reported and discussed. It was found that molybdenum addition to NiAl changes the mechanisms of the attack and highly decelerates the corrosion rate under such demanding conditions.
Starting Page	151
Ending Page	165
Page Count	15
File Format	PDF
ISSN	0030770X
Journal	Oxidation of Metals
Volume Number	81
Issue Number	1-2
e-ISSN	15734889
Language	English
Publisher	Springer US
Publisher Date	2013-12-25
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	Intermetallic coatings Chlorine environments Degradation mechanisms Metallic Materials Inorganic Chemistry Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Metals and Alloys Inorganic Chemistry

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