A single nickel transition layer for electroplating chrome on copper tube of crystallizer
A crystallizer copper tube and transition layer technology, which is applied in the field of simple nickel transition layer, can solve the problems of high electroplating process requirements, instability, and unstable plating layer, and achieve the effect of simple plating solution composition and prolonged service life
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Embodiment 1
[0018] A single nickel transition layer for electroplating chromium on a crystallizer copper tube, the single nickel transition layer is located between the crystallizer copper tube and the electroplated chromium layer, the thickness of the coating is about 3 μm, and the transition layer includes nickel formed between the nickel and the copper tube Three-layer structure of copper metallurgical bonding layer, pure nickel layer and nickel-chromium metallurgical bonding layer formed by nickel and chromium; the transition layer is plated on the copper tube of the crystallizer by electroplating, and the composition of the plating solution used in the electroplating is: sulfamic acid Nickel 500g / L, nickel sulfate 35g / L, sodium lauryl sulfate 55g / L; electroplating process: pH4, bath temperature 55°C, cathode current density 4.5A / dm 2 , dipping time 20min.
[0019] The composition and process used for the subsequent coating layer in conjunction with the transition layer are: the bath ...
Embodiment 2
[0021] A single nickel transition layer for electroplating chromium on copper tubes of crystallizers, the single nickel transition layer is located between the copper tubes of the crystallizer and the electroplated chromium layer, the thickness of the coating is about 4 μm, and the transition layer includes nickel formed between nickel and copper tubes Three-layer structure of copper metallurgical bonding layer, pure nickel layer and nickel-chromium metallurgical bonding layer formed by nickel and chromium; the transition layer is plated on the copper tube of the crystallizer by electroplating, and the composition of the plating solution used in the electroplating is: sulfamic acid Nickel 600g / L, nickel sulfate 25g / L, sodium lauryl sulfate 65g / L; electroplating process: pH6, bath temperature 45°C, cathode current density 6.5A / dm 2 , immersion plating time 10min.
[0022] The composition and process used in the subsequent coating layer in conjunction with the transition layer a...
Embodiment 3
[0024] A single nickel transition layer for electroplating chromium on copper tubes of crystallizers, the transition layer of single nickel is located between the copper tubes of crystallizers and the electroplated chromium layer, the thickness of the coating is about 3.5 μm, and the transition layer includes nickel and copper tubes formed between Three-layer structure of nickel-copper metallurgical bonding layer, pure nickel layer, and nickel-chromium metallurgical bonding layer formed by nickel and chromium; the transition layer is plated on the copper tube of the crystallizer by electroplating, and the composition of the plating solution used in the electroplating is: aminosulfonic Nickel acid 550g / L, nickel sulfate 30g / L, sodium lauryl sulfate 60g / L; electroplating process: pH5, bath temperature 50°C, cathode current density 5A / dm 2 , dipping time 15min.
[0025] The composition and process used for the subsequent coating layer in conjunction with the transition layer are:...
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