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

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.

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Paper Citation


in Harvard Style

Hosaka T., Amanina I., Saruwatari N., Yoshihara S. and J. MacDonald B. (2017). Influence of Microstructural Evolution Processed by ECAP on Corrosion Behavior of Pure Magnesium in RPMI-1640 Medium . In Proceedings of the 10th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES, (BIOSTEC 2017) ISBN 978-989-758-216-5, pages 118-125. DOI: 10.5220/0006143201180125


in Bibtex Style

@conference{biodevices17,
author={Taito Hosaka and Iman Amanina and Naohiro Saruwatari and Shoichiro Yoshihara and Bryan J. MacDonald},
title={Influence of Microstructural Evolution Processed by ECAP on Corrosion Behavior of Pure Magnesium in RPMI-1640 Medium},
booktitle={Proceedings of the 10th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES, (BIOSTEC 2017)},
year={2017},
pages={118-125},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006143201180125},
isbn={978-989-758-216-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 10th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIODEVICES, (BIOSTEC 2017)
TI - Influence of Microstructural Evolution Processed by ECAP on Corrosion Behavior of Pure Magnesium in RPMI-1640 Medium
SN - 978-989-758-216-5
AU - Hosaka T.
AU - Amanina I.
AU - Saruwatari N.
AU - Yoshihara S.
AU - J. MacDonald B.
PY - 2017
SP - 118
EP - 125
DO - 10.5220/0006143201180125