Author/Authors :
Zhou, Huiling School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , Chen, Yipeng School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , Sui, Yi School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , Zhu, Zhiyuan School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , Yang, Lanlan School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , He, Zhen School of Materials Science and Engineering - Jiangsu University of Science and Technology - Zhenjiang , China , Lv, Yunfei Chengde Petroleum College - Chengde , China , Li, Chengtao Suzhou Nuclear Power Research Institute - Suzhou , China , Fang, Kewei Suzhou Nuclear Power Research Institute - Suzhou , China
Abstract :
The corrosion behavior of an ultralow iron nickel-based alloy Inconel 625 under high-temperature water has been evaluated. Theresults show that surface oxidation and pitting were the principal corrosion mechanisms of Inconel 625 during the initialimmersion period. The surface layer of the oxidefilm isfirst Ni-enriched and then Fe-enriched as immersion time increases.The iron ions dissolved from the autoclave could lead to the formation of NiFe2O4and have a great influence on the oxidationbehavior of Inconel 625. The oxides nucleated by solid-state reactions with selective dissolution of Fe and Ni and then grew upthrough precipitation of cations from solution.
Keywords :
Iron Ion , Corrosion Behavior , Inconel 625 in High-Temperature Water , PWR
