铁离子对高温水中因科镍合金625腐蚀行为的影响

Effect of Iron Ion on Corrosion Behavior of Inconel 625 in High-Temperature Water.

作者信息

Zhou Huiling, Chen Yipeng, Sui Yi, Lv Yunfei, Zhu Zhiyuan, Yang Lanlan, He Zhen, Li Chengtao, Fang Kewei

机构信息

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.

A. O. Smith (China) Water Heater Co., Ltd., Nanjing 210038, China.

出版信息

Scanning. 2020 Oct 21;2020:9130362. doi: 10.1155/2020/9130362. eCollection 2020.

DOI:10.1155/2020/9130362

PMID:33149799

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7599422/

Abstract

The corrosion behavior of an ultralow iron nickel-based alloy Inconel 625 under high-temperature water has been evaluated. The results show that surface oxidation and pitting were the principal corrosion mechanisms of Inconel 625 during the initial immersion period. The surface layer of the oxide film is first Ni-enriched and then Fe-enriched as immersion time increases. The iron ions dissolved from the autoclave could lead to the formation of NiFeO and have a great influence on the oxidation behavior of Inconel 625. The oxides nucleated by solid-state reactions with selective dissolution of Fe and Ni and then grew up through precipitation of cations from solution.

摘要

已评估了一种超低铁镍基合金因科镍合金625在高温水中的腐蚀行为。结果表明，在初始浸泡期，表面氧化和点蚀是因科镍合金625的主要腐蚀机制。随着浸泡时间的增加，氧化膜的表面层首先富镍，然后富铁。从高压釜中溶解的铁离子会导致NiFeO的形成，并对因科镍合金625的氧化行为有很大影响。氧化物通过与铁和镍的选择性溶解进行固态反应成核，然后通过溶液中阳离子的沉淀而生长。