Document Type
Journal Article
Publication Title
Materials & Design
Publisher
Elsevier
School
School of Engineering
RAS ID
36010
Funders
Jiangsu Province six talent peaks project Natural Science Foundation of Jiangsu Guangxi University Key Research and Development Program of Shaanxi Edith Cowan University
Abstract
The corrosion behavior of laser powder bed fusion produced (L-PBF-produced) titanium alloys involving flowing body fluid is still unclear. Therefore, this work investigates in vitro corrosion behavior and the characteristics of passive films formed on L-PBF-produced Ti–6Al–4V in both static and dynamic Hank’s solutions. Electrochemical measurements, immersion tests, X-ray photoelectron spectroscopy and scanning electron microscopy were conducted. In comparison to the L-PBF-produced Ti–6Al–4V in static Hank’s solution, the samples showed lower charge transfer resistance and higher passivation current density (anodic current density as well) in dynamic Hank’s solution. Meanwhile, a more apparent deposition of apatite and hydroxyapatite is found on the L-PBF-produced Ti–6Al–4V in dynamic Hank’s solution. Such outcomes mainly result from the enhancement of film/solution interfacial transportation in dynamic Hank’s solution. The dynamic Hank’s solution provides more calcium and phosphate ions to the surface of the passive film and also takes away the dissolved metal ions. Therefore, more salt deposition and a lower-quality passive film are found.
DOI
10.1016/j.matdes.2021.109907
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
Chen, L. Y., Zhang, H. Y., Zheng, C., Yang, H. Y., Qin, P., Zhao, C., ... Zhang, L. C. (2021). Corrosion behavior and characteristics of passive films of laser powder bed fusion produced Ti–6Al–4V in dynamic Hank’s solution. Materials & Design, 208, article 109907. https://doi.org/10.1016/j.matdes.2021.109907