化学镀Ni-Co-P 工艺配方优化

为获得化学镀Ni-Co-P工艺配方的合理配比,运用单因素对比实验,探讨了各种添加剂对化学镀Ni-Co-P合金镀液和镀层性能的影响,确定了各添加剂浓度范围,选取5个工艺参数,设计了L16(45)正交实验方案,用极差法分析了各参数对工艺性能影响的顺序,确定了最佳工艺配方。结果表明:当溶液中硫酸镍40 g/L,硫酸钴2 g/L,次磷酸钠25 g/L,柠檬酸钠50 g/L,硼酸为20 g/L,添加剂A为20-40 g/L,pH值7.0,温度90℃时,可以得到可以得到含钴量3.7%、含磷量约6%的Ni-Co-P中磷合金镀层,镀层表面胞状物均匀分布,组织致密。

Optimization of Technology of Ultrasonic Electroless Ni-Co-P Plating Process

In order to obtain the optimized factors of ultrasonic Electroless Ni-Co-P Plating by using orthogonal
design experiments,a group of orthogonal tests was arranged and the effect of different additives on electroplating solutions and deposits properties was investigated,concentrations of additives were determined,5 processing parameters
were selected. L16(45) orthogonal test scheme was designed,range analysis was employed to find out the influence sequence on the technology and thus the optimum formula and process were ensured. The test results on optimum condition show that the alloy deposits with 88. 71wt% Ni,3. 72wt% Co,5. 99wt% P are obtained. The obtained Ni-Co-P coating are in fine crystal grain size,well distributed on the substrate surface. The optimized factors are as follows:nickel salt is 40 g/ L,cobaltous sulfate in the solution is 2 g,sodium hypophosphite in the solution is 25 g/L,sodium citrate in the solution is 50 g/L,boric acid in the solution is 20 g/L,the others annexing agent in the solution is 20 to 40 g/L,the pH value is 7. 0,the temperature is 90.