| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel electroplating film having a high elongation percentage of≥8%, and to provide its production method. SOLUTION: The mixing ratio between nickel sulfate (hexahydrate) and nickel chloride (hexahydrate) in a plating bath, [nickel sulfate(hexahydrate)/nickel chloride (hexahydrate)] is set to the range of 250/50 to 190/110 based on g/L, thus the nickel electroplating film to be formed is made into the one in which Vickers hardness is≤210, the average crystal grain size is≥2.5μm, the ratio [A/B] between the peak intensity [A] in the (111) face 1 and the peak intensity [B] in the (200) face 2 obtained by X-ray diffraction is≥3, and an elongation percentage is≥8%. COPYRIGHT: (C)2008,JPO&INPIT
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