Formation Mechanism and Properties of Oxide Film on 310-ODS Steel in Supercritical Water

Abstract

Abstract: Abstract： The general corrosion susceptibility of 310ODS steel was evaluated in 600℃ supercritical deaerated water by weight gain. The sample periods were 100, 300, 600, 1 000, and 1 500 h. The surface oxide film of 310ODS steel was analyzed by using scanning electron microscope (SEM), energy disperse spectroscopy (EDS) and Xray diffractometer (XRD). The results show that a dense oxide film is formed on the surface of 310ODS steel during the early days (300 h) and the corrosion rate decreases rapidly. The oxide film is a doublelayer structure with a dense Crenriched inner layer and a porous Feenriched outer layer. The inner layer becomes uniform and the outer layer does not change with the immersing time. The oxidation process of 310-ODS steel in 600℃ supercritical deaerated water meets the solidstate growth mechanism and Y2O3 in the grain boundaries improves the corrosion resistance.

Key words: Key words： 310-ODS steel； supercritical water, general corrosion

CLC Number:

TL 341

LU Hui,SHEN Zhao,ZHANG Lefu. Formation Mechanism and Properties of Oxide Film on 310-ODS Steel in Supercritical Water[J]. Journal of Shanghai Jiaotong University, 2016, 50(04): 528-533.

References

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