IT SOFC 인터커넥터 구동 조건에서의 스테인레스 소재의 산화거동에 미치는 표면전처리의 영향

• Published in: 대한금속·재료학회지, 49(1) Vol. 49; no. 1; pp. 25 - 31
• Main Authors: 문민석, Min Seok Moon, 우기도, Kee Do Woo, 김상혁, Sang Hyuk Kim, 유명한, Myung Han Yoo
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 20.01.2011; 대한금속·재료학회
• Subjects: metallic interconnecter; metals; oxidation; surface modification; X-ray diffraction; 재료공학
• ISSN: 1738-8228; 2288-8241

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 800~1000℃ than other fuel cell systems. Thus, many studies have attempted to reduced the operation temperature of SOFC to about 600~800℃, 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℃. 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.