Effect of electrolyte composition on the microstructure and bio-corrosion behavior of micro-arc oxidized coatings on biomedical Ti6Al4V alloy

Jingtao Wang; Yaokun Pan; Rui Feng; Hongwei Cui; Benkui Gong; Lei Zhang; Zengli Gao; Xiaoli Cui; Hongbin Zhang; Zhiqiang Jia

Journal of Materials Research and Technology (Mar 2020)

Effect of electrolyte composition on the microstructure and bio-corrosion behavior of micro-arc oxidized coatings on biomedical Ti6Al4V alloy

Jingtao Wang,
Yaokun Pan,
Rui Feng,
Hongwei Cui,
Benkui Gong,
Lei Zhang,
Zengli Gao,
Xiaoli Cui,
Hongbin Zhang,
Zhiqiang Jia

Affiliations

Jingtao Wang: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Yaokun Pan: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China; Corresponding author.
Rui Feng: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Hongwei Cui: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Benkui Gong: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Lei Zhang: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Zengli Gao: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Xiaoli Cui: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China
Hongbin Zhang: College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China
Zhiqiang Jia: School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255000 Shandong, PR China

Journal volume & issue: Vol. 9, no. 2
pp. 1477 – 1490

Abstract

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In view of the low bioactivity and the inability to form bone fusion with surrounding bones in vivo, bioactive ceramic coatings were prepared on the bio-inert Ti6Al4V (TC4) alloys by micro-arc oxidation (MAO) technology in two different electrolytes. The effects of electrolyte composition and applied positive voltage on the microstructure and corrosion resistance of the MAO coating were studied. The surface morphology, composition, and microstructure of the MAO coatings were systematically characterized. The corrosion behaviors of the MAO coatings were studied by electrochemical corrosion test and simulated body fluid (SBF) immersion test in vitro. After soaking in SBF solution, CaP apatites formed on the surface of the MAO coatings. Results showed that the MAO coatings obtained from the silicate electrolyte grew rapidly and corroded faster in SBF solution, while MAO coatings obtained from the calcium phosphate electrolyte had excellent surface and corrosion resistance properties. The formation and corrosion mechanisms of the MAO coatings obtained from the two different electrolytes were discussed. Keywords: Titanium alloys, Microstructure, Micro-arc oxidation, Electrochemical corrosion, Bioactivity

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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