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 language | English |
|---|---|
| Pages (from-to) | 430-437 |
| Number of pages | 8 |
| Journal | Keikinzoku/Journal of Japan Institute of Light Metals |
| Volume | 67 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
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