Study on the corrosion resistance properties of a 18Cr-ODS in supercritical water

摘要：

The corrosion behavior of a 18Cr-ODS steel exposed in supercritical water (SCW) at600 /25MPa was studied in order to evaluated the suitability of the ODS steel ℃ eel in thesupercritical water reactor (SCWR). The effects of exposure time on the corrosion behaviorwere investigated. Gravimetry, scanning electron microscope/electron dispersive X-rayspectroscopy (SEM/EDS) and X-ray diffraction (XRD) were employed to characterize theoxide layer. The results showed that the weight gain increased as increasing exposure time,following a parabolic law. A layer formed on the surface of the sample consisting of adiffusion layer, a chromium-rich inner layer and an iron-rich outer layer. XRD results showedthat the phases of the outer layer are mainly hematite and magnetite. Hematite contentincreased and magnetite decreased as elapsing of exposure time. Cracks and porosity couldalso be observed on the outer oxide layer. Diffusion plays an important role in the corrosionprocess.

关键词： SCWR ODS steel ferritic steel corrosion properties

作者: Hu Helong Zhou Zhangjian Li Ming Zhang Lefu Li Shaofu Wang Man Ge Changchun

作者单位: University of Science and Technology Beijing,Beijing,China Shanghai Jiaotong University,Shanghai,China

会议类型: 国际会议

会议名称: 3rd China-Canada Joint Workshop on Supercritical Water-Cooled Reactors(第三届中国-加拿大超临界水堆研讨会 (CCSC-2012)

会议地点: 西安

会议语种:英文

页码: 1-9

在线出版日期: 2012-04-18（万方平台首次上网日期，不代表论文的发表时间）