Corrosion behavior of 316 stainless steel for advanced high‐temperature water‐cooled nuclear plant

Abstract

Corrosion occurs widely in the supercritical water system materials under high temperature and pressure. To select reliable candidate materials, corrosion behavior of many alloys was investigated. This study focused on investigating the corrosion behavior of 316 stainless steel (316 SS) in supercritical water (798 K/24 MPa). After exposed to SCW for 200 h, the oxidation kinetics, surface morphology, and diffusion of elements were investigated by weight measurement, scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The surface of 316 SS showed isolated and discontinued oxide scales. The oxide scale was determined to be a monolayer layer, and the main composition was determined to be Fe-Cr-rich spinel with a few amounts of magnetite attached to the surface. A few pores due to pitting corrosion were found on the surface, and the oxidation mechanism was also investigated.

WITHDRAWN: Hot Corrosion Evaluation of Cr 3 C 2 /8YSZ based Plasma Sprayed Coatings on SS316 in Na 2 SO 4 – V 2 O 5 Molten Salt Environment at 700 0 C

“…The molten salts act as corrosive species that react with metal surfaces in a hot gas environment. Thus, coating on austenitic steel is highly preferable to counteract the deposited corrosive species and protect the components [1][2][3][4][5]. Plasma spray coating has shown to be an appropriate and cost-effective method for solving a wide range of issues in the manufacturing sector.…”