Effect of flow state of corrosive solution on corrosion behavior of AZ31B magnesium alloy tube inside

Yuki Soya, Taito Hosaka, Shouichirou Yoshihara, Chiaki Sakamoto, Bryan J. MacDonald

Research output: Contribution to journalArticle

Abstract

Magnesium is an essential element for human health and is a suitable material for bio-absorbable implant because the risk of hypermagnesemia is quite low. In recent years, a number of studies have been carried out using bioabsorbable materials for implantable scaffolds. It is desirable the device performance can be tailored to the anatomical site in which the device is implanted, so the key problem for these devices was to control the corrosion rate of magnesium. However, the effect of the blood flow over the devices on the corrosion behavior is not obvious yet. In the present study, we investigated the corrosion behavior of various specimens immersed in fluid flows. The corrosive environment was reproduced by pulsatile flow of NaCl solution representing blood flow in the human body. It was found that the corrosion behaviors of the specimens were strongly affected by the induced strain, the surface condition and the flow rate. In contrast, the change in the fluid flow characteristics such as laminar flow and turbulent flow had less strong effect on the corrosion behavior.

Original languageEnglish
Pages (from-to)430-437
Number of pages8
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume67
Issue number9
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

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Keywords

  • Corrosion behavior
  • Fluid flow
  • Magnesium alloy
  • Simulated body fluid
  • Wall shear stress

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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