Ultrafine grained Mg-1Zn-1Mn-0.3Zr alloy and its corrosion behaviour
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2016, Vol 74, Issue 2
Abstract
Purpose: The goal of this paper is to present the corrosion properties of the ultrafine grainedMg-1Zn-1Mn-0.3Zr bulk alloy after surface modification during HF and NaHCO3 treatment.Design/methodology/approach: An ultrafine grained Mg-1Zn-1Mn-0.3Zr bulk alloy wassynthesized by consolidating mechanically alloyed powders. The phase and microstructureanalysis was carried out using X-ray diffraction, scanning electron microscopy and theproperties were measured using corrosion testing equipment.Findings: The sintering of Mg-1Zn-1Mn-0.3Zr powders led to the formation of bulk materialwith an average grain size of about 73 nm. Ultrafine grained Mg-1Zn-1Mn-0.3Zr alloy wasmore corrosion resistant than microcrystalline Mg.Practical implications: The results showed an improved corrosion resistance of HF andNaHCO3 treated Mg-1Zn-1Mn-0.3Zr alloy in Ringer solution compared with the untreatedsample. The corrosion rate of treated samples followed the order HF <NaHCO3.Originality/value: Ultrafine grained Mg-1Zn-1Mn-0.3Zr biomaterials due to denser MgF2or MgCO3 surface layers, compared with untreated samples, possess unique surfaceproperties and consequently are considered to be the future generation of biomaterials.
Authors and Affiliations
K. Kowalski, M. Jurczyk
Keywords
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