Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1637496 | Transactions of Nonferrous Metals Society of China | 2011 | 9 Pages |
Abstract
The hot corrosion behaviors of Ni-16Cr-xAl(x=4.5%, 6.8%, 9.0%, mass fraction) based alloys in Na2SO4-25% NaCl molten salts at 600 °C were investigated. The effects of pre-oxidation and Al content on the resistance to hot corrosion were examined. The hot corrosion resistance of Ni-16Cr-xAl based alloy with Al addition from 4.5% to 9.0% increases with increasing Al content. The alloy with Al content of 9.0% shows the highest hot corrosion resistance among the examined alloys because more β-NiAl phases are obtained to sustain the Al2O3 scale repaired during hot corrosion. Pre-oxidized specimens have a superior hot corrosion resistance compared with the as-cast specimens, due to a protective oxide scale formed after pre-treatment.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Wei-jie LI, Yong LIU, Yan WANG, Chao HAN, Hui-ping TANG,