Preparation method of nickel-coated copper powder for conductive rubber
A technology of conductive rubber and nickel-clad copper, which is applied in the direction of liquid chemical plating, coating, metal material coating process, etc., can solve the problems of high cost, increased energy consumption, environmental pollution, etc., and achieve the reduction of plating cost and saving Effects of energy consumption and water conservation
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[0060] Example 1
[0061] The designed formula nickel content is 30%, the copper powder mass is 2g, and the powder particle size is 75μm. The formula of the plating solution: nickel sulfate 39g / L, sodium hypophosphite 40g / L, sodium citrate 44g / L, and the loading of copper powder is 20g / L. The volume of the final plating solution is about 100ml, and the plating pH is 12 to 13. The preparation process is as follows figure 1 shown.
[0062] take a 1 =a 2 =2.0g sodium hydroxide, dissolved to get A 1 , A 2 ; measure B 1 =10ml, B 2 =2ml; Mixed Solution A 2 with B 2 , to obtain a solution C≈20ml, where a 2 The concentration is 100g / L in C, B 2 The concentration in C is 100ml / L; the A 1 , copper powder, B 1 Slowly add them into the plating solution beaker in turn, and keep stirring the plating solution; the plating reaction time is 10 to 20 minutes. During the plating process, slowly add the C solution dropwise for 20 to 30 minutes at an average rate of 1 to 2 ml / min to m...
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[0067]Example 2
[0068] Design example 1 comparative test, plating pH=11-12, other operations are the same as example 1, and the composition analysis of EDS coating is shown in Table 1.
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[0069] Example 3
[0070] Design example 1 comparative test, plating pH=13-14, other operations are the same as example 1, and the composition analysis of EDS coating is shown in Table 1.
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