Electroless Deposition of Ni-Sn Layers Having High Sn Content（＞30 at.%）on Fe Substrates（2）

Chemical Resistance Property of Electroless Deposited Ni–Sn–P Layers Having High Sn Content

“…The importance of the addition of a Sn element in the Ni−Sn−P layers to provide high surface chemical resistance to NaClO aq was discussed based on the results obtained with field-emission scanning electron microscopy−energy-dispersive X-ray spectroscopy (FE-SEM−EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In addition, because the Ni−Sn−P layers have various chemical resistance properties, as we have reported, 8,9 the application of Ni−Sn−P layers to various areas, such as electronic, decoration, and auto industry areas, is expected. Therefore, the hardness of the Ni−Sn−P layers was compared with that of the electroless-deposited Ni− P layer.…”

“…The composition of the bath for the electrodeposition of Ni–Sn–P and electroless deposition methods are shown in our previous papers. − The preparation method of the Ni–Sn–P layers can be simply expressed as follows. The Ni and Sn sources were nickel­(II) sulfate [NiSO 4 , 99.9%, FUJIFILM Wako Pure Chemical Corporation (FUJI)] and sodium stannate trihydrate (Na 2 SnO 3 ·3H 2 O, 85.0+%, FUJI).…”

“…Therefore, the development of the surface with high corrosion resistance against NaClO aq is increasingly needed. We recently developed electroless deposition of a nickel–tin–phosphorus (Ni–Sn–P) layer on a cold-rolled commercial steel plate (SPCC). − The Ni–Sn–P layers have high Sn content (>30 at. %) and exhibit high corrosion resistance against hydrogen peroxide and sodium hydroxide aqueous solutions. , In this study, the chemical resistance of Ni–Sn–P layers against NaClO aq was examined for the first time.…”

“…We recently developed electroless deposition of a nickel–tin–phosphorus (Ni–Sn–P) layer on a cold-rolled commercial steel plate (SPCC). − The Ni–Sn–P layers have high Sn content (>30 at. %) and exhibit high corrosion resistance against hydrogen peroxide and sodium hydroxide aqueous solutions. , In this study, the chemical resistance of Ni–Sn–P layers against NaClO aq was examined for the first time. The importance of the addition of a Sn element in the Ni–Sn–P layers to provide high surface chemical resistance to NaClO aq was discussed based on the results obtained with field-emission scanning electron microscopy–energy-dispersive X-ray spectroscopy (FE-SEM–EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS).…”