A study about the thickness uniformity of electroformed nickel sheet on 304 stainless steel
To address the issue of the thickness non-uniformity of electroformed nickel plates resulted from uneven current density distribution, this study investigated the impact of electroforming process parameters and cathode fixturing structure on enhancing the uniformity of nickel plate thickness and mit-igating dendritic growth. The results show the uniformity of nickel sheet is the best when the current density is set at 11 A·dm-2, the anode length at 3.5 cm, the electrode spacing at 2.5 cm, and the temper-ature at 45 ℃. The average thickness is 0.484 mm, and the range and standard deviation of thickness de-creases are 0.157 mm and 0.044 mm, respectively. Forthermore, by optimizing the rack design and in-troducing cathode shielding, thickness at the contact points is enhanced and nodular can be alleviated. The electroforming time can be shorted from 10 h to 4 h. Moreover, the thickness range and the stan-dard deviation are reduced down to 0.116 mm and 0.036 mm, respectively. The optimal conditions ob-tained brings about the homogeneous thickness of the nickel sheet and a 60％ reduction in the electro-forming time. These improvements increase utilization ratio of anode nickel shots, thereby contributing to cost savings.
万方数据
维普
