Date:

2025-04-30

Title of Paper:

Early oxidation of Super304H stainless steel and its scales stability in supercritical water environments

Journal:

International Journal of Hydrogen Energy

Summary:

The early oxidation of Super304H stainless steel exposed to supercritical water at 450
C,
540
C, and 580
C was characterized. After a 40 h exposure, distribution density of oxide
grains produced on samples increased with experimental pressures, while initial aqueous
pH had a negligible influence on short-term corrosion morphologies, implying that the
outer oxide layer of scales may form via solid growth mechanism rather than by metals
dissociation/oxides precipitation process. After a repeated 24 h cycles of exposure at
condition of 540
C/25 MPa followed by that of 500
C/23 MPa up to 5 cycles, partial spallation
of the scales appeared along inner and outer layer interface, not substrate/scales
interface due to the enhanced adhesion of scales on the substrate by pinning effects and
production and convergence of cavities at the inner/outer layer interface.

Co-author:

Yanhui Li, Shuzhong Wang, Panpan Sun, Zhenxia Tong, Donghai Xu, Yang Guo

Volume:

41(35)

Page Number:

15764-15771

Translation or Not:

No

Date of Publication:

2016-09-19