  We have performed a study of the magnetic, magnetoelastic, and corrosion
resistance properties of seven different composition magnetoelastic-resonant
platforms. For some applications, such as structural health monitoring, these
materials must have not only good magnetomechanical properties, but also a high
corrosion resistance. In the fabricated metallic glasses of composition
Fe(73-x)NixCr5Si10B12, the Fe/Ni ratio was varied (Fe + Ni = 73% at.) thus
changing the magnetic and magnetoelastic properties. A small amount of chromium
(Cr5) was added in order to achieve the desired good corrosion resistance. As
expected, all the studied properties change with the composition of the
samples. Alloys containing a higher amount of Ni than Fe do not show magnetic
behavior at room temperature, while iron-rich alloys have demonstrated not only
good magnetic properties, but also good magnetoelastic ones, with
magnetoelastic coupling coefficient as high as 0.41 for x=0 in the
Fe73Ni0Cr5Si10B12 (the sample containing only Fe but not Ni). Concerning
corrosion resistance, we have found a continuous degradation of these
properties as the Ni content increases in the composition. Thus, the corrosion
potential decreases monotonously from 46.74 mV for the x=0 composition,
Fe73Ni0Cr5Si10B12 to -239.47 mV for the x=73 composition Fe0Ni73Cr5Si10B12.
