Title: EFFECT OF TRISODUM PHOSPHAT CONCENTRATION ON THE MORPHOLOGY AND CORROSION RESISTANCE OF MAGNESIUM ALLOY AZ31B USING PLASMA ELECTROLYTIC OXIDATION (PEO)
Abstract:Magnesium is one of the candidate materials for biodegradable implants. Magnesium has the same mechanical properties as human bone, but the degradation rate of magnesium fast. Surface engineering tech...Magnesium is one of the candidate materials for biodegradable implants. Magnesium has the same mechanical properties as human bone, but the degradation rate of magnesium fast. Surface engineering technology is required to decrease the degradation rate on magnesium substrate. This research, using the surface engineering technology of Plasma Electrolytic Oxidation (PEO). the electrolyte solution of PEO used was KOH and Na 3 PO 4 .12H 2 O. The KOH concentration is 1g/l and Na 3 PO 4 .12H 2 O concentration was varied 0.5, 1, and 2.26 g/l. From the XRD analysis, was found MgO and Mg 3 (PO 4 ) 2 and there are pores on the surface. When the Na 3 PO 4 .12H 2 O concentration is increased until 2.26 g/l the pores are homogenous, dense, and large. From the potentiodynamic polarization test results that PEO coating can decrease the corrosion rate of magnesium AZ31B from 50.219 mmpy to 0.1368 mmpy.Read More