In vitro corrosion behavior of biodegradable WE43 alloy under various physiological flow velocities.
In: Journal of Materials Science, Jg. 59 (2024-05-15), Heft 18, S. 7854-7872
Online
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Zugriff:
In the present work, the influence of the simulated physiological flow field on the in vitro corrosion behavior of biodegradable WE43 (Mg-4.05 wt% Y-3.64 wt% RE-0.52 wt% Zr) magnesium alloy has been studied, using Hanks' balanced salt solution (HBSS) as the corrosion medium. The results indicate that the corrosion rate of WE43 alloy is time-dependent under each condition. After immersion for 168 h, the corrosion rate of WE43 alloy with a flow rate of 5.33 cm/s is about 3.49 mm/year, which is 1.7 times higher than that under static condition. The contradictory between the dynamic dissolution and re-deposition of the corrosion products is strongly related to the flow velocity. Initially, an accelerated mass transfer at a low flow rate would promote the corrosion layer generation of WE43 alloy, dominating the integrity of the corrosion layer, while continually high shear stress induced by a high flow rate field would destroy the integrity of the corrosion layer, primarily mitigate the thickness of the Ca-P layer. Owing to the corrosion product evolution and the influences of Cl−, the corrosion mode of the WE43 alloy herein transforms from localized corrosion to relatively uniform corrosion with the increase in flow rate. [ABSTRACT FROM AUTHOR]
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In vitro corrosion behavior of biodegradable WE43 alloy under various physiological flow velocities.
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Autor/in / Beteiligte Person: | Dai, Jianwei ; Zhang, Xiangang ; Zhang, Lu ; Zhan, Linjuan ; Yang, Juyi ; Han, Linyuan ; Li, Xuan ; Guo, Zhijun ; Bai, Jing ; Xue, Feng ; Chu, Chenglin |
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Zeitschrift: | Journal of Materials Science, Jg. 59 (2024-05-15), Heft 18, S. 7854-7872 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0022-2461 (print) |
DOI: | 10.1007/s10853-024-09617-1 |
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