Low-Temperature Nitrocarburizing of Austenitic Stainless Steel for Combat Corrosion in H2S Environments
| Autor: | Zhenghua Tang, Jun Wang, Hanshan Dong, Longyi Li, Bo Zeng, Jing Yan, Xiaoying Li, Hongyuan Fan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Metallurgy technology industry and agriculture 0211 other engineering and technologies Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material Condensed Matter Physics 01 natural sciences Sulfur Corrosion Chromium X-ray photoelectron spectroscopy chemistry Mechanics of Materials Phase (matter) 0103 physical sciences engineering Austenitic stainless steel Spectroscopy 021102 mining & metallurgy |
| Zdroj: | Metallurgical and Materials Transactions A. 51:4242-4256 |
| ISSN: | 1543-1940 1073-5623 |
| DOI: | 10.1007/s11661-020-05802-4 |
| Popis: | The time-dependent experiment was performed to investigate the corrosion behavior of low-temperature liquid nitrocarburized (LNC) 304 austenitic stainless steel in wet H2S environments. Characteristics of H2S corrosion products, as well as localized corrosion behavior, were investigated using X-ray diffraction (XRD), scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), and optical profilometry. The results revealed that the untreated steels, of which the H2S corrosion product layer on the untreated surface thickened but displayed a layered defect structure as the corrosion proceeded, had a higher weight loss than the LNC. Energy-dispersive spectroscopy (EDS) served to reveal the relationship between corrosion behavior and the content of sulfur, chromium, and other elements, and the valences of these elements were illustrated by XPS. The surface morphology after removing corrosion products showed that the presence of nitrocarburized S phase could prevent general corrosion and inhibit pit propagation. |
| Databáze: | OpenAIRE |
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