The corrosion activity of amorphous plates of Ca_(60)Mg_(15)Zn_(25)alloy was investigated.The biocompatible elements were selected for the alloy composition.The electrochemical corrosion and immersion tests were carried out in a multi-electrolyte fluid and Ringer’s solution.Better corrosion behavior was observed for the samples tested in a multi-electrolyte fluid despite the active dissolution of Ca and Mg in Ringer’s solution.The experimental results indicated that reducing concentration of NaCl from 8.6 g/dm~3for Ringer’s solution to 5.75 g/dm~3caused the decrease of the corrosion rate.The volume of the hydrogen evolved after 480 min in Ringer’s solution(40.1 ml/cm~2)was higher in comparison with that obtained in a multi-electrolyte fluid(24.4 ml/cm~2).The values of opencircuit potential(E_(OCP))for the Ca_(60)Mg_(15)Zn_(25)glass after 1 h incubation in Ringer’s solution and a multielectrolyte fluid were determined to be-1553 and-1536 m V vs.a saturated calomel electrode(SCE).The electrochemical measurements indicated a shift of the corrosion current density(j_(corr))from 1062μA/cm~2for the sample tested in Ringer’s solution to 788μA/cm~2for the specimen immersed in a multi-electrolyte fluid.The corrosion products analysis was conducted by using the X-ray photoelectron spectroscopy(XPS).The corrosion products were identified to be CaCO_3,Mg(OH)_2,CaO,MgO and Zn O.The mechanism of corrosion process was proposed and described based on the microscopic observations.The X-ray diffraction and Fourier transform infrared spectroscopy(FTIR)also indicated that Ca(OH)_2,CaCO_3,Zn(OH)_2and Ca(Zn(OH)_3)_2·2H_2O mainly formed on the surface of the studied alloy. The corrosion activity of amorphous plates of Ca_ (60) Mg_ (15) Zn_ (25) alloy was investigated. The biocompatible elements were selected for the alloy composition. The electrochemical corrosion and immersion tests were carried out in a multi-electrolyte fluid and Ringer’s solution.Better corrosion behavior was observed for the samples tested in a multi-electrolyte fluid despite the active dissolution of Ca and Mg in Ringer’s solution. The experimental results indicated that reducing concentration of NaCl from 8.6 g / dm ~ 3 for Ringer’s solution to 5.75 g / dm ~ 3caused the decrease of the corrosion rate. The volume of the hydrogen evolved after 480 min in Ringer’s solution (40.1 ml / cm ~ 2) was higher in comparison with that obtained in a multi-electrolyte fluid (24.4 ml / cm ~ 2) .The values ​​of opencircuit potential (E_ (OCP)) for the Ca_ (60) Mg_ (15) Zn_ (25) glass after 1 h incubation in Ringer’s solution and a multielectrolyte fluid were determined to be -1553 and -1536 m V vs. a saturated calomel electrode (SCE). The ele Ctrochemical measurements indicated a shift of the corrosion current density (j_ (corr)) from 1062 μA / cm ~ 2 for the sample tested in Ringer’s solution to 788 μA / cm ~ 2 for the specimen immersed in a multi-electrolyte fluid. by using the X-ray photoelectron spectroscopy (XPS). The corrosion products were identified to be CaCO_3, Mg (OH) _2, CaO, MgO and Zn O. The mechanism of the corrosion process was proposed and described based on the microscopic observations. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) also indicated that Ca (OH) _2, CaCO_3, Zn (OH) _2and Ca (Zn (OH) _3) _2 · 2H_2O mainly formed on the surface of the studied alloy.