Effect of aging treatment on microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N stainless steel
| Autor: | Jian Chen, Huiling Zhou, Z.B. Wang, Jiasheng Zou, Lanlan Yang, Xinyi Wang, Fuhui Wang, Xiaojing Wang, Yanxin Qiao |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Polymers and Plastics Precipitation (chemistry) Mechanical Engineering Metals and Alloys Oxide Electrochemistry Microstructure Corrosion chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Mechanics of Materials Materials Chemistry Ceramics and Composites Pitting corrosion Grain boundary Composite material |
| Zdroj: | Journal of Materials Science & Technology. 107:197-206 |
| ISSN: | 1005-0302 |
| DOI: | 10.1016/j.jmst.2021.06.079 |
| Popis: | The effect of aging treatment on the microstructure and corrosion behavior of a Fe-18Cr-15Mn-0.66N high-nitrogen stainless steel (HNSS) in 3.5 wt.% NaCl solution was investigated using a series of electrochemical tests, scanning electronic microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results showed that the aging treatment led to the precipitation of Cr2N particles along the grain boundaries and their morphologies changed from dispersive particles to continuous network as the aging time increased up to 60 min. Aging time had minor effects on the corrosion potential and corrosion current density, but resulted in the sharp decrease in the pitting corrosion potential. The passive film behaved as a n-type semiconductor, and the donor density of the passive film increased with the aging time. Meanwhile, the fraction of stable oxide (Cr2O3) in the passive film decreased with the aging time. It demonstrates that the aging treatment deteriorated the protectiveness of the passive film, hence weakened the corrosion resistance of HNSS. |
| Databáze: | OpenAIRE |
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