CORROSION BEHAVIOR OF Zr-10Mo ALLOYS IN NIOBIUM-DOPED LACTATE RINGER’S SOLUTION

Abstract

CORROSION BEHAVIOR OF Zr-10Mo ALLOYS IN NIOBIUM-DOPED LACTATE RINGER'S SOLUTION. This research discusses the corrosion behavior of Zr-10Mo alloys in Niobium-doped lactate ringer's solution. The addition of Niobium of 1%, 3% and 5% on Zr-10Mo alloys aims to study the effect of adding Niobium to the hardness, microstructure and corrosion resistance of Zr-Mo alloys. The alloys are made by melting the materials of Zr, Mo and Nb with a certain percentage of weight using single arc melting furnace in Argon atmosphere with high purity and Tungsten eletrodes. The alloys (as cast) are subjected to hardness testing using C-scale rockwell, microstructure using optical microscopy, compounds and phases in the alloys (as cast) using XRD and corrosion testing using polarization method in lactate ringers' solution. The hardness value increases by the addition of Niobium, Zr-10Mo-1Nb alloy of 34 HRC, Zr-10Mo-3Nb alloy of 38 HRC and Zr-10Mo-5Nb alloy of 41.5 HRC. The basketweave-shaped microstructure with the addition of Niobium creates relatively smaller grain size. The value of corrosion rate decrases by the addition of Niobium at the immersion times of 0 minute, 60 minutes and 120 minutes, Zr-10Mo-1Nb alloy of 4.208 mpy, Zr-10Mo-3Nb alloy of 3.538 mpy and Zr-10Mo-5Nb alloy of 2.813 mpy, included in the excellent category (1-5 mpy).

Corrosion Behavior of Ternary Zr-25Ti-5Sn Alloy Doped with Ge as Biomaterials Implant in Simulation Body Fluid Solution

“…Ultra high purity jetting as a protective gas. Smelting is done 4 times, each material is 15 grams of Zr-25Ti-5Sn without gerrmanium (Ge) doping and Zr-25Ti-3Sn-2Gegermanium (Ge) doping [8].…”

“…Stages of metallographic testing, carried out before the surface preparation of the sanding installation is completed with sandpaper paper 1000 mesh, 1500 mesh and 2000 mesh to the polishing installation using velvet cloth and zirconia powder (ZrO 2 ) as an abrasive material to be able to use scratches on the surface as desired pattern planning interpretation of microstructure [8]. The etching stage to clarify the microstructure by corroding grain boundaries.…”

“…The etching stage to clarify the microstructure by corroding grain boundaries. The etching solution used was a mixture of 10 mL of fluoride acid solution (HF), 5 mL of HNO 3 , and 100 mL of aquadest with an immersion method for 20seconds [8]. Observation of the microstructure was carried out using an Olympus BX60M optical microscope with a magnification of 100x magnification [8].…”

“…Corrosion testing is carried out using the polarization method on the as cast. By using electrochemical testing methods with polarization technique ASTM G59 in simulation body fluid solution media using DC 105 software [8]. The output of this test is a tafel polarization curve and corrosion potential curve which is then observed for changes in the polarization curve.…”

“…Improvement in material performance related to its properties can be done in several ways, one of which is to vary the composition by changing the concentration or adding a combining element, This study aims to determine the value of zirconium-based metallic glass corrosion rate, study the effect of variations in alloy composition and variation of concentration on the zirconium-based metallic glass material corrosion rate, and determine the potential of zirconium-based metallic glass material for implant material. [8,7] Currently, with the increase of the population of over 65 years old persons, in countries such as Japan, United States, Germany etc, the need for the use of artificial implants is also increasing, making necessary more thorough studies on materials that may be used for such an end. Some Zr and Ti alloys present, among other qualities, excellent mechanical properties, very good corrosion resistance, biocompatibility, and good durability, they become interesting and promising materials for use in implants.…”