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Molten salt corrosion resistance of FeAl alloy with additions of Li, Ce and Ni
The corrosion performance of FeAl intermetallic alloys with additions of (1 at.%)Li, Ce, Ni and combinations (Ce + Li and Ce + Ni) in molten salts have been studied using the weight loss technique. Salts included Na 2SO 4 and NaVO 3 and testing temperatures included 600, 650 and 700 °C for NaVO 3, a...
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Published in: | Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-06, Vol.399 (1), p.344-350 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The corrosion performance of FeAl intermetallic alloys with additions of (1
at.%)Li, Ce, Ni and combinations (Ce
+
Li and Ce
+
Ni) in molten salts have been studied using the weight loss technique. Salts included Na
2SO
4 and NaVO
3 and testing temperatures included 600, 650 and 700
°C for NaVO
3, and 900, 950 and 1000
°C for Na
2SO
4 during 100
h. The corroded specimens were studied in the scanning electronic microscope (SEM) and the corrosion products analyzed with an X-ray energy dispersive analyzer (EDX) attached to it. The corrosion resistance in NaVO
3 increases as the temperature increased, whereas in Na
2SO
4 decreased. The effect of the different alloying elements depended upon the salt used. In NaVO
3, for instance, the FeAl
+
Ce
+
Li alloy was one with the highest corrosion rates but in Na
2SO
4 it had the lowest corrosion rate. The addition of these elements most of times increased the corrosion rate of the FeAl-base alloy, whereas in Na
2SO
4 most of times decreased the corrosion rate. The results are discussed in terms of the degree of protectiveness that the external Al
2O
3 layer gives to the alloys depending on the testing temperature. |
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ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/j.msea.2005.04.022 |