Abstract
Cr–Ni–Fe alloy deposits containing different Cr, Ni and Fe contents were created by varying the electroplating current density in an eco-friendly trivalent Cr-based bath with Ni2+ and Fe2+ ions. The Cr content of the Cr–Ni–Fe alloy deposits increased from 14 to 75wt.% when the electroplating current density changed from 15 to 25A/dm2. The mapping result obtained with a scanning electron microscope showed that a uniform ternary Cr–Ni–Fe alloy deposit could be obtained from the proposed bath, and X-ray diffraction results indicated the Fe-based alloy electroplated at 15A/dm2 was crystalline, whereas the Cr-based alloy deposits electroplated at a high current density had an amorphous structure. The electrochemical corrosion test results showed that the corrosion resistance of the Cr–Ni–Fe alloy deposit electroplated at 20A/dm2 was better than that of the Cr–Ni–Fe alloy deposit obtained at 25A/dm2, despite having almost identical chemical compositions. These results were obtained by performing an electrochemical test and microstructure observations.
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