|
Vol.49, No.1, 25 ~ 32, 2011
|
| Title |
| Effect of Surface Treatments of Stainless Steels on Oxidation Behavior Under Operating Condition of IT SOFC Interconnect |
| 문민석 Min Seok Moon , 우기도 Kee Do Woo , 김상혁 Sang Hyuk Kim , 유명한 Myung Han Yoo |
|
|
|
| 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 800~1000℃ 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. |
|
|
| Key Words |
| metals, surface modification, oxidation, X-ray diffraction, metallic interconnecter |
|
|
 |
|
