The Erosion-Corrosion Performance of SA213-T22 Steel in Low Velocity Conditions
| Autor: | Alberto Martínez-Villafañe, F. H. Stott, Facundo Almeraya-Calderón, J. G. Gonzalez-Rodriguez, José G. Chacón-Nava |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Erosion corrosion Metallurgy Oxide Tribology Atmospheric temperature range Metal chemistry.chemical_compound chemistry Mechanics of Materials Fluidized bed visual_art visual_art.visual_art_medium General Materials Science Deposition (chemistry) |
| Zdroj: | Journal of Materials Engineering and Performance. 10:699-704 |
| ISSN: | 1059-9495 |
| Popis: | The erosion-corrosion (E-C) behavior of SA213-T22 steel has been studied in a laboratory fluidized-bed (FB) facility in the temperature range from 100 to 600 °C. Tests were carried out on pin specimens in air using alumina particles of 560 µm average size at impact velocities from 1.5 to 4.5 m/s. The trends of wear with temperature showed small weight gains at velocities up to 1.5 m/s. Erodent deposition was a dominant process at temperatures below about 300 °C and velocities below about 2 m/s. At higher velocities, a peak wastage temperature was observed at about 350 °C. The wastage/temperature curves observed in both cases suggested four temperature regions. In each region, a different E-C regime operates. Scanning electron microscopy (SEM) revealed various wastage mechanisms, i.e., (a) oxide chipping, (b) development of a compact and adherent oxide scale, (c) oxide and metal removal, and (d) fracture and spalling within the oxide layer and at the scale/metal interface. In the present study, the latter mechanism was responsible for the high wastage rates observed at temperatures above about 450 °C and impact velocities above 3.5 m/s. |
| Databáze: | OpenAIRE |
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