Journal
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
Volume 47, Issue 1, Pages 887-894Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13369-021-05747-9
Keywords
High-nitrogen stainless steel; Corrosion; Electrochemical; Passive film; XPS
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Funding
- National Natural Science Foundation of China [52001142, 51401092]
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The electrochemical corrosion behavior of an aged Fe-18Cr-15Mn-0.66 N high-nitrogen austenitic stainless steel in 3.5 wt.% NaCl solution was studied, showing that the passive films formed were mainly composed of Cr oxide/hydroxide and iron oxides. XPS depth profile analysis indicated an increase in Cr and Fe contents near the passive film/HNSS interface, while the contents of Cr and Fe oxide/hydroxide decreased.
The electrochemical corrosion behavior of an aged Fe-18Cr-15Mn-0.66 N high-nitrogen austenitic stainless steel in 3.5 wt.% NaCl solution was studied using the measurements of polarization curves and electrochemical impedance spectroscopy, and the composition of the passive films formed on the HNSS was investigated using x-ray photoelectron spectroscopy (XPS). XPS analyses results showed that the passive films formed in this solution were composed of Cr oxide/hydroxide (mainly) and iron oxides (partially). The XPS depth profile suggested that near the passive film /HNSS interface, both Cr and Fe contents increased, but the Cr and Fe oxide/hydroxide contents decreased.
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