Influence of microstructural evolution processed by ECAP on corrosion behavior of pure magnesium in RPMI-1640 medium

Taito Hosaka, Iman Amanina, Naohiro Saruwatari, Shoichiro Yoshihara, Bryan J. MacDonald

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Influence of microstructure changes caused by Equal-channel angular pressing (ECAP) process on corrosion behavior of pure magnesium in RPMI-1640 medium was investigated. The grain size of ECAPed samples (30µm) were greatly reduced compared with the grain size of the annealed sample (200µm). Then, the immersion test has been carried out for a certain period of time. It was revealed that mass loss of the ECAPed sample is larger than the as-received sample and the annealed sample. Thus, it could be considered that many crystal defects yielded by ECAP process reduced the corrosion resistance. However, the corrosion resistance has been improved to a certain extent according to reduction of crystal defects through the heat treatment at the recrystallization temperature or lower. In addition, the amount of gas generation of the ECAP sample after immersion test is larger compared with the as-received sample. Therefore, correlation between the amount of gas generated and the mass loss was confirmed. Based on qualitative identification of the elements by Energy Dispersive X-ray Spectrometry (EDS), the corrosion products of the sample surface after the immersion test has been estimated to be a kind of calcium phosphate. These above results have indicated the potential for fabrication of magnesium as bioabsorbable materials.

Original languageEnglish
Title of host publicationBIODEVICES 2017 - 10th International Conference on Biomedical Electronics and Devices, Proceedings; Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017
EditorsNathalia Peixoto, Ana Fred, Hugo Gamboa, Mario Vaz
PublisherSciTePress
Pages118-125
Number of pages8
ISBN (Electronic)9789897582165
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes
Event10th International Conference on Biomedical Electronics and Devices, BIODEVICES 2017 - Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017 - Porto, Portugal
Duration: 2017 Feb 212017 Feb 23

Publication series

NameBIODEVICES 2017 - 10th International Conference on Biomedical Electronics and Devices, Proceedings; Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017
Volume2017-January

Other

Other10th International Conference on Biomedical Electronics and Devices, BIODEVICES 2017 - Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017
CountryPortugal
CityPorto
Period17/2/2117/2/23

Keywords

  • Biomaterial
  • Corrosion Behaviour
  • ECAP Process
  • Microstructural Evolution
  • Pure Magnesium
  • RPMI 1640 Medium

ASJC Scopus subject areas

  • Biomedical Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Hosaka, T., Amanina, I., Saruwatari, N., Yoshihara, S., & MacDonald, B. J. (2017). Influence of microstructural evolution processed by ECAP on corrosion behavior of pure magnesium in RPMI-1640 medium. In N. Peixoto, A. Fred, H. Gamboa, & M. Vaz (Eds.), BIODEVICES 2017 - 10th International Conference on Biomedical Electronics and Devices, Proceedings; Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017 (pp. 118-125). (BIODEVICES 2017 - 10th International Conference on Biomedical Electronics and Devices, Proceedings; Part of 10th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2017; Vol. 2017-January). SciTePress. https://doi.org/10.5220/0006143201180125