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Journal of Materials Science

, Volume 54, Issue 21, pp 13753–13766 | Cite as

Chemical leveling mechanism and oxide film properties of additively manufactured Ti–6Al–4V alloy

  • Yifei Zhang
  • Jianzhong LiEmail author
  • Shuanghang Che
  • Zhongdong Yang
  • Yanwen Tian
Metals & corrosion
  • 125 Downloads

Abstract

This paper presents a new approach to modify the surface of the Ti–6Al–4V alloy fabricated by additive manufacturing. This method is particularly suitable for titanium or titanium alloy components with complex shapes (such as pipes, holes and internal flow paths) which are difficult to be polished by conventional methods. The corresponding electrochemical tests were carried out in Hanks’ balanced salt solution. The results demonstrated that the chemical polishing of additively manufactured Ti–6Al–4V obtained a high-quality surface through the combination of oxidation corrosive action and polishing liquid flow by reducing the peak-to-valley spacing and smoothing the alloy surface. After chemical polishing, a passivation film consisted of rutile and anatase formed on the alloy surface, which showed n-type semiconductor characteristics and had a lower donor density, leading to the increase in the corrosion resistance.

Notes

Acknowledgements

This work was supported by the Iron and Steel Joint Research Found of National Natural Science Foundation and China Baowu Steel Group Corporation Limited (Grant Number U1760118); and the National Natural Science Foundation of China (Grant Number 51374053).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of MetallurgyNortheastern UniversityShenyangChina
  2. 2.Liaoning Key Laboratory for Metallurgical Sensors and TechnologyNortheastern UniversityShenyangChina

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