Nickel-based alloy electrolytic polishing liquid and polishing method thereof
A nickel-based alloy and electrolytic polishing technology, which is applied in the field of electrolytic polishing, can solve the problems of fixed size, unsure composition, and inability to obtain an ideal polished surface, etc., to achieve obvious metallic luster, good appearance, and improved corrosion resistance.
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[0043] Example 1
[0044] For the electrolytic polishing process of the nickel-based alloy sealing plate of the nuclear power reactor core make-up tank, the specific steps are as follows:
[0045] (1) Perform activation pretreatment on the nickel-based alloy electrolytic polishing workpiece to ensure that there is no excess water on the surface of the workpiece; the pretreatment is to remove the surface oil stains on the workpiece with lye, and then put the clean workpiece into a concentration containing hydrogen peroxide 2 5% 5% dilute nitric acid enters the activation for 10 minutes, rinses with tap water after activation, and puts into the electrolytic cell after there is no obvious water flow on the surface of the workpiece.
[0046] (2) The composition of the electrolyte in the electrolytic cell is (in weight percentage): a concentration of 85wt% phosphoric acid 65%, 98wt% sulfuric acid 12%, ammonium thiocyanate 4%, 1,4-butynediol 7%, diacetyl oxime 6%, polyethylene glycol (M=4...
Example
[0049] Examples 2~4
[0050] Using the raw materials and methods of Example 1, the only difference is the composition of the electrolyte in the electrolytic cell. The composition of the electrolyte is shown in Table 1. Other processes and process parameters are the same as in Example 1. Among them, the concentration of nitric acid is 85 wt%, and the concentration of sulfuric acid is 98 wt%.
[0051] The roughness and metallographic inspection results of the polished workpiece are shown in Table 3.
[0052] Table 1 The composition of the electrolyte used in Examples 1 to 4
[0053]
Example
[0054] Examples 5-8
[0055] Using the raw materials and methods of Example 1, the only difference is that the process parameters are different during electrolysis. The detailed process parameters are shown in Table 2. The roughness and metallographic inspection results of the polished workpiece are shown in Table 3.
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