Corrosion Resistance in Mg-1Mn-Ha Alloy as Biomaterial from Mechanosynthesis Process in Ringer Lachtate Media

Ketahanan Korosi pada Paduan Mg –1Mn–HA Sebagai Bahan Biomaterial Hasil Proses Mechanosynthesis dalam Media Ringer Lachtate

Abstract

Recently, further research is being carried out to replace non-biodegradable biomaterials that have toxicity properties in the body, but biodegradable materials have chemical-physical properties and mechanical properties that do not resemble real bone, therefore we need the right alloy for biodegradable biomaterials. Magnesium is biodegradable, biocompatible, non-toxic, with an elastic modulus of 42 GPa which is relatively close to the modulus of bone elasticity (3 - 40 GPa). The method used in the manufacture of biomaterials from biodegradable materials is the mechanical integration of the Mg - 1% Mn - Hydroxyapatite alloy using the mechanosynthesis method. With a milling time of 2 hours at a speed of 1000 rpm. Compaction pressure of 10 MPa and sintering time of 2 hours, causing the formation of porosity resulting from this method filled with hydroxyapatite (HA) reacts to form tissue bonds with the bone. Characterization of Mg - 1% Mn - HA alloy was carried out using micro Vickers hardness testing, metallography, corrosion rate, SEM-EDS, and XRD. The hardness value of the Mg - 1Mn alloy, the average hardness value of the Mg - 1Mn Non-HA alloy is 34.87 HVN, Mg - 1Mn - 10% HA is 42.03 HVN, Mg - 1Mn - 15% HA is 43.19 HVN, and Mg - 1Mn - 20% HA, namely 47.79 HA. XRD analysis shows that the phase formed in the Mg-1% Mn alloy is formed by the Mg + α Mn alloy and in the Mg-1% Mn mixture, which is formed Mg + α Mn and Ca10 (Po4) 6 (OH) 2. The corrosion rate value of the Mg - 1Mn - Non-HA alloy has a corrosion rate of 1.035e3 mpy while the Mg - 1Mn - 10% HA alloy sample has a corrosion rate of 487 mpy.

Keywords: biomaterial, biodegradable, mechanosynthesis, hidroxyapatite, ringer lachtate solution