Study of Microstructure and Corrosion Behavior of Cast Zn–Al–Mg Alloys

Abstract Zn-based alloys have found increasing interest as orthopedic biodegradable implantable materials, hence it was the aim of this work to investigate microstructure and corrosion behavior Zn–0.5Al– x Mg cast with different additions in simulated body fluid (SBF). The samples were prepared using a simple stir casting method molten poured iron mold. SEM results showed that adding greatly influenced where degree fineness increased rise content. Moreover, polarization measurements revealed Zn–0.5Al–0.6Mg alloy attained lowest degradation rate 0.33 mm/year compared other investigated which complies requirements ideal rates for bone implants. This helps metal last until healing tissue proceeds. fine structure uniform distribution Aluminum oxide MgZn 2 intermetallic phases along grain boundaries most likely main factors superior stability SBF. However, higher concentrations (1 wt%) lowered resistance Zn–Al–Mg attributed accelerated galvanic between Zn 11 inhomogeneous products on surface due size coarse alloy.