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http://dx.doi.org/10.3365/KJMM.2011.49.1.025

Effect of Surface Treatments of Stainless Steels on Oxidation Behavior Under Operating Condition of IT SOFC Interconnect  

Moon, Min-Seok (Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University)
Woo, Kee-Do (Dept. of Metallurgical System Engineering & RCAMD, Chunbuk National University)
Kim, Sang-Hyuk (Dept. of Metallurgical System Engineering & RCAMD, Chunbuk National University)
Yoo, Myung-Han (Dept. of Mechanical Design Engineering, Chunbuk National University)
Publication Information
Korean Journal of Metals and Materials / v.49, no.1, 2011 , pp. 25-31 More about this Journal
Abstract
Solid oxide fuel cells (SOFCs) have many attractive features for widespread applications in generation systems. Recently, stainless steels have attractive materials for metallic bipolar plate because metallic bipolar plates have many benefits compared to others such as graphite and composite bipolar plates. SOFC operates on high temperature of about $800{\sim}1000^{\circ}C$ than other fuel cell systems. Thus, many studies have attempted to reduced the operation temperature of SOFC to about $600{\sim}800^{\circ}C$, which is the intermediate temperature (IT) of SOFC. Low cost and high-temperature corrosion resistance are very important for the practical applications of SOFC in various industries. In this study, two specimens, 304 and 430 stainless steels with and without different pre-surface treatments on the surface were investigated. And, specimens were exposed at high temperature in the box furnace under oxidation atmosphere of $800^{\circ}C$. Oxidation behavior have been investigated with the materials exposed at different times (100 hrs and 400 hrs) by SEM, EDS and XRD. By increasing exposure time, the amount of metal oxide increased in the order like; STS304 < STS430 and As-received < As-polished < Sand-blast specimens.
Keywords
metals; surface modification; oxidation; X-ray diffraction; metallic interconnecter;
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Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 1
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