|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||I-36: Influence of Thermal Treatment on Corrosion Rates of Mg-RE and Mg-10%Zn-0.3%Ca Alloys in 3.5%NaCl Solution
||Marilia Girardi Zorzato, Joseph Robson, Dirk Engelberg, Julie Gough
|On-Site Speaker (Planned)
||Marilia Girardi Zorzato
Magnesium alloys are biocompatible materials with suitable mechanical properties for orthopaedic applications. The main driver for their potential use as implant materials is that they will act as temporary implants avoiding stress-shielding effects. However, rapid degradation of magnesium alloys in physiological medium is undesirable for some applications. Degradation must be controlled in order to allow enough time for the body to absorb and/or eliminate corrosion products, and maintain the implant’s mechanical integrity until tissue has sufficiently healed. Application of heat treatments can improve corrosion behaviour of Mg alloys by modifying the metal internal structure. This work aims to evaluate the influence of different thermal treatments on the corrosion rates of a Mg-RE alloy and a Mg-10%Zn-0.3%Ca alloy in 3.5%NaCl solution. Microstructure (grain size and precipitate distribution) of these alloys after solution treatment, ageing and overageing were compared to as-received condition. Potentiodynamic corrosion tests were performed and related to microstructural analysis.