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

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

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

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Research Themes

Natural and Built Environments

Priority Areas

Engineering, technology and nanotechnology

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