화학공학소재연구정보센터
Thin Solid Films, Vol.544, 69-73, 2013
Microstructure and electrochemical corrosion behavior of Cr-Ni-Fe alloy deposits electroplated in the presence of trivalent Cr ions
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 75 wt.% when the electroplating current density changed from 15 to 25 A/dm(2). 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 15 A/dm(2) 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 20 A/dm(2) was better than that of the Cr-Ni-Fe alloy deposit obtained at 25 A/dm(2), despite having almost identical chemical compositions. These results were obtained by performing an electrochemical test and microstructure observations. (C) 2013 Elsevier B.V. All rights reserved.