Preparation method of superhydrophobic surface of metal zirconium
A technology of superhydrophobic surface and metal zirconium, which is applied to the device for coating liquid on the surface, special surface, pretreated surface, etc. Mass preparation and industrial production, reduced maintenance costs, good reproducibility
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Embodiment 1
[0026] The zirconium foil with a purity of 99.6% was polished with 800# water sandpaper until there were no obvious scratches on the surface, and then ultrasonically cleaned in acetone for 3 minutes. Then do the following in order:
[0027] ①Chemical etching: Put the cleaned zirconium foil in a chemical etching solution at 3°C for 1 second, take it out, rinse it with water, and repeat the above operation 5 times;
[0028] The chemical etching solution is prepared by dissolving 15g / L boric acid in a mixture of hydrofluoric acid, nitric acid and water with a volume ratio of 2:5:3; wherein hydrofluoric acid, boric acid and nitric acid are all analytically pure (below same).
[0029] ②Anodizing: Use the zirconium foil that has been chemically etched in step ① as the anode, use the large-area graphite sheet as the cathode, and use the organic alcohol solution containing a small amount of fluoride aqueous solution as the anodizing solution for anodizing treatment. The anodizing v...
Embodiment 2
[0036] The zirconium plates with a purity of 98.0% were polished with 400, 600 and 800# water sandpaper until there were no obvious scratches on the surface, and then ultrasonically cleaned in acetone for 3 minutes. Then do the following in order:
[0037] ①Chemical etching: Put the cleaned zirconium plate in the chemical etching solution at 8°C for 2 seconds, take it out, then rinse it with water, and repeat the above operation 4 times.
[0038] ②Anodizing: Use the zirconium plate that has been chemically etched in step ① as the anode, use the large-area graphite sheet as the cathode, and use the organic alcohol solution containing a small amount of fluoride aqueous solution as the anodizing solution for anodizing treatment. The anodizing voltage is 80V , the temperature is 35°C, and the time is 6h.
[0039] The fluoride aqueous solution is prepared from sodium fluoride, sodium hexafluorosilicate and water. The mass percentage of fluorine in the anodic oxidation solution is ...
Embodiment 3
[0045] The zirconium plate with a purity of 98.5% was polished with 400, 600 and 800# water sandpaper until there were no obvious scratches on the surface, and then ultrasonically cleaned in acetone for 3 minutes. Then do the following in order:
[0046] ①Chemical etching: Place the cleaned zirconium plate in a chemical etching solution at 5°C for 1.5 seconds, take it out, rinse it with water, and repeat the above operation 5 times.
[0047] ②Anodizing: Use the zirconium plate that has been chemically etched in step ① as the anode, use the large-area graphite sheet as the cathode, and use the organic alcohol solution containing a small amount of fluoride aqueous solution as the anodizing solution for anodizing treatment. The anodizing voltage is 80V , the temperature is 25°C, and the time is 5h.
[0048] The fluoride aqueous solution is prepared from sodium fluoride, sodium tetrafluoroborate and water. The mass percent content of fluorine in the anodic oxidation solution is 0.4...
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