AISI 304不锈钢中嵌入的MnS在NaCl溶液中周围腐蚀产物的演变

Evolution of the Corrosion Products around MnS Embedded in AISI 304 Stainless Steel in NaCl Solution.

作者信息

Li Dan, Hao Hongliang, Wang Zhichao, Nyakilla Edwin Ernest

机构信息

Ordos Research Institute of Energy, Peking University, Ordos 017010, China.

School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China.

出版信息

Materials (Basel). 2024 Aug 15;17(16):4050. doi: 10.3390/ma17164050.

DOI:10.3390/ma17164050

PMID:39203228

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11356085/

Abstract

The characterization and evolution of corrosion products deposited on/around MnSs, a typical kind of inclusive particle embedded in AISI 304 stainless steel, was analyzed using a quasi-in-situ method in a 3.5 wt.% NaCl solution. On/around the MnS inclusion, a corrosion product layer with spinel FeCrO as the main component was formed, with a thickness of several hundred nanometers. Below the layer, there was a cavity layer in which part of the MnS remained, forming secondary pitting along the MnS/matrix boundary. The mechanism of corrosion product deposition and evolution accompanied by MnS dissolution, as well as the characteristics of the corrosion products, are discussed.

摘要

采用准原位方法，在3.5 wt.%的NaCl溶液中，分析了沉积在AISI 304不锈钢中典型的夹杂颗粒——硫化锰（MnS）上/周围的腐蚀产物的特征和演变。在MnS夹杂物上/周围，形成了以尖晶石FeCrO为主要成分的腐蚀产物层，厚度为几百纳米。在该层之下，存在一个空洞层，其中部分MnS残留，沿MnS/基体边界形成二次点蚀。讨论了伴随MnS溶解的腐蚀产物沉积和演变机制以及腐蚀产物的特征。