Influence of the surface etching on the corrosion behaviour of a three‐dimensional printed Ti–6Al–4V alloy

Fojt, Jaroslav; Kačenka, Zdeněk; Jablonská, Eva; Hybášek, Vojtěch; Pruchova, Eva

doi:10.1002/maco.202011658

Cited by 6 publications

(6 citation statements)

References 25 publications

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“…The higher real area compared to the entered value caused a decrease in the calculated resistance. The specimen etching has a negative influence on the corrosion resistance, this effect is long term, as was mentioned in our previous study [33]. Nevertheless, the subsequent anodization increased the corrosion resistance to the same level or higher as for the original surface.…”

Section: Resultssupporting

confidence: 62%

Influence of Surface Finishing on Corrosion Behaviour of 3D Printed TiAlV Alloy

Fojt

Hybášek

Kačenka

et al. 2020

Metals

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Additive manufacturing is currently one of the promising methods for the fabrication of products of complex shapes. It is also used in medical applications, thanks to technological progress, which also enables the printing of metallic materials. However, the final products often have to undergo a final surface treatment. In this work, the influence of surface finishing on the corrosion behavior of the medical alloy Ti-6Al-4V prepared by the selective laser melting technique is studied. The samples were subjected to mechanical, chemical and electrochemical treatments. Corrosion behavior was investigated using DC and AC electrochemical techniques such as potentiodynamic and potentiostatic curves and electrochemical impedance spectroscopy. Furthermore, the influence of surface treatments on the possibility of localized corrosion attack was evaluated. The results showed that the surface treatments have a positive effect on the corrosion resistance and reduce the risk of crevice corrosion.

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Section: Resultssupporting

confidence: 62%

Influence of Surface Finishing on Corrosion Behaviour of 3D Printed TiAlV Alloy

Fojt

Hybášek

Kačenka

et al. 2020

Metals

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“…The etching conditions were selected based on the previous study of authors. Six minutes is the minimal time to achieve a surface with no partially melted particles [ 36 ]. The measurements of the cross-sectional area of the cubical specimens were performed by means of a digital micrometer (Mitutoyo, Mitutoyo Corporation, Tokyo, Japan) for all specimens.…”

Section: Methodsmentioning

confidence: 99%

“…However, the porous structures being implanted into the human body are supposed to deal with dynamic loading conditions in blood-like material and the environment of body fluids. These fluids and cells penetrate the porous structure that can induce a corrosion process of the implant [ 36 , 49 ]. This effect can lead to disruption of the physiological ion movement in human nerve cells.…”

Section: Future Workmentioning

confidence: 99%

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Post-Processing Treatment Impact on Mechanical Properties of SLM Deposited Ti-6Al-4 V Porous Structure for Biomedical Application

et al. 2020

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Additive manufacturing technologies allow producing a regular three-dimensional mesh of interconnected struts that form an open-cell porous structure. Regular porous structures have been used in the orthopedic industry due to outstanding bone anchoring. The aim of the study was to determine how the postprocessing influences the mechanical properties of porous structures made of titanium alloy CL 41TI ELI. The effect of hot isostatic pressing (HIP) as a method of increasing microstructural integrity was investigated here. The influence of surface etching (SE) technique, which was applied to the porous structure for cleaning unmelted titanium powder particles on the surface of connectors from the inner surfaces of a porous structure, was examined in this study. Mechanical properties were investigated by means of compression tests. The results point out that HIP has a minor effect on the mechanical behavior of considered porous structures. The SE is an effective method to clean the surface of a porous structure, which is very important in the case of biomedical applications when loose powder can cause serious health problems. Another effect of the SE is also the strut thickness reduction. Reducing strut thickness of a porous structure with the surface etching decreases its stiffness to the same extent as predicted by the relative density theoretical model but did not result in structural damage.

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“…Subjected to electropolishing with optimised parameters, an even and smoother surface of the Ti-6Al-4V alloy was achieved, and the corrosion resistance was increased because of the formation of a stable TiO 2 film on the surface [52] . In addition, the partially melted powder particles during the SLM process were successfully removed via surface etching using HF and HNO 3 solutions, but the corrosion rate of the SLM-produced Ti-6Al-4V alloy increased owing to the formation of a fluorine-containing corrosion product layer on the surface [53] .…”

Section: Corrosion Properties Of Dense Bulk Titanium Alloys Fabricated Via 3d Printingmentioning

confidence: 99%

Review on Corrosion Characteristics of Porous Titanium Alloys Fabricated by Additive Manufacturing

Gai

Bai

et al. 2021

J. Shanghai Jiaotong Univ. (Sci.)

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Porous titanium and its alloys have been considered as promising implants owing to their low elastic modulus and capability to provide channels for bone growth. Currently, additive manufacturing (3D printing) techniques have been successfully applied to produce porous titanium alloys owing to the advantages of controllable and precise fabrication. Considering the safety aspect, an understanding of corrosion in porous titanium alloys and the corresponding mechanisms is important for their long-term application in the human body. In this paper, the recent progress in improving the corrosion properties of porous titanium alloys fabricated via 3D printing techniques is reviewed. The effects of pore type, porosity, electrolyte, and modification of the material on the corrosion properties of porous titanium alloys are introduced and discussed. In addition, the limitations of traditional methods for measuring the corrosion performance of porous titanium alloys were analysed. Perspectives for evaluating and improving the corrosion performance of porous titanium alloys using new methods are provided.

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Influence of the surface etching on the corrosion behaviour of a three‐dimensional printed Ti–6Al–4V alloy

Cited by 6 publications

References 25 publications

Influence of Surface Finishing on Corrosion Behaviour of 3D Printed TiAlV Alloy

Influence of Surface Finishing on Corrosion Behaviour of 3D Printed TiAlV Alloy

Post-Processing Treatment Impact on Mechanical Properties of SLM Deposited Ti-6Al-4 V Porous Structure for Biomedical Application

Review on Corrosion Characteristics of Porous Titanium Alloys Fabricated by Additive Manufacturing

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