Influence of Surrounding Cations on the Surface Degradation of Magnesium Alloy Implants under a Compressive Pressure.

ABSTRACT: The effect of cations in the surrounding solutions on the surface degradation of magnesium alloys, a well-recognized biodegradable biomaterial, has been neglected compared with the effect of anions in the past. To better simulate the compressive environment where magnesium alloys are implanted into the body as a cardiovascular stent, a device is designed and employed in the test so that a pressure, equivalent to the vascular pressure, can be directly applied to the magnesium alloy implants when the alloys are immersed in a medium containing one of the cations (K(+), Na(+), Ca(2+), and Mg(2+)) found in blood plasma. The surface degradation behaviors of the magnesium alloys in the immersion test are then investigated using hydrogen evolution, mass loss determination, electron microscopy, pH

SUBMITTER: Ning C 

PROVIDER: S-EPMC4924522 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature