FE-CR-NI-MO ايجاد رسوب آلياژي چهار جزيي

THE ELECTRODEPOSITION OF QUATERNARY Fe-Cr-Ni-Mo ALLOYS

The electrodeposition of alloy thin films has been gained importance in recent years for its practical applicability in electronic and computer industries. The use of binary or higher alloys significantly increases the possibility of satisfying the varieties of practical requirements not met by the application of pure metals. These requirements include protective, decorative, optical and antifriction surfaces with the more recent addition of requirements such as magnetic susceptibility, coercive force and electrical conductivity. In this research, electrochemical behavior of quaternary Fe-Cr-Ni-Mo alloy deposits was studied. Using the cyclic voltammetry the reduction potential regions were defined and then the current density - potential curves were plotted using chronopotentiometry technique. Also, the nucleation and growth mechanism of alloy deposits was studied by current - transient curves (chronoamperometry). It was observed that the deposition of the Fe-Cr-Ni-Mo alloys occurred in -1.2 V and the alloy composition was changed under more cathodic potentials. The results demonstrates that the alloy deposits are found with composition of stainless steel and magnetic thin films due to a variation of bath parameters such as current density and pH. The nucleation was instantaneous in the high overpotential with a three-dimensional growth mechanism.