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http://dx.doi.org/10.3740/MRSK.2002.12.1.003

Effect of Si Content and RE Addition on Molten Salt Corrosion and High Temperature Oxidation of the Austenite Alloys  

Jo, Su-Haeng (Korea Atomic Energy Research Institute)
Jang, Jun-Seon (Dept. of Materials Eng. Dalian University of Technology, Dalian, China)
O, Seung-Cheol (Korea Atomic Energy Research Institute)
Sin, Yeong-Jun (Korea Atomic Energy Research Institute)
Park, Seong-Won (Korea Atomic Energy Research Institute)
Publication Information
Korean Journal of Materials Research / v.12, no.1, 2002 , pp. 3-9 More about this Journal
Abstract
The corrosion behavior of alloys in a molten salt was investigated along with the oxidation characteristics in the air. The basic composition of alloys in the study was Fe-25Ni-7Cr with Si and RE(rare-earth metal) as additives. The corrosion rate of the alloys was low in a molten salt of LiCl while the rate was high in the mixed molten salt of LiCl and $Li_2O$. When Si is added to the base alloy of Fe-25Ni-7Cr, corrosion resistance was improved as the Si content is increased up to 3%, however, it was observed that the corrosion resistance was getting worse as the Si content is increased. The base alloy with 2.43% of Si and 0.9% of RE(KSA-65), showed higher corrosion rate compared to that of KSA-63 alloy with an equivalent amount of only Si. The corrosion resistance of KSA-65 was similar to that of the base alloy(KSA-60). The oxidation resistance of KSA-65 alloy was greatly increased even at $850^{\circ}C$ for a long term exposure.
Keywords
molten salt corrosion; high temperature oxidation; molten salt;
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