2021 journal article

Electrochemical study of the dissolution of oxide films grown on type 316L stainless steel in molten fluoride salt

CORROSION SCIENCE, 186.

co-author countries: United States of America 🇺🇸
author keywords: Molten fluoride salt; Type 316L stainless steel; Corrosion; EIS
Source: Web Of Science
Added: June 10, 2021

The corrosion behavior of oxide films grown on Type 316L stainless steel (SS) in molten FLiNaK (LiF-NaF-KF: 46.5−11.5−42 mol.%) salt was investigated. The results show that the oxide film formed on Type 316L SS is unstable and can only temporarily protect materials from corrosion in molten FLiNaK salt. Based on the electrochemical impedance spectroscopy, the oxide dissolution rate is calculated to be 0.85 nm/h at 700 °C in molten FLiNaK salt. After the oxide film dissolved, Cr and Fe are selective dealloyed from the steel, leading to intergranular corrosion of Type 316L SS in molten fluoride salt.