A kind of anodic aluminum oxide film and its preparation method and application
An anodized aluminum, anodic oxidation technology, applied in the direction of anodic oxidation, surface reaction electrolytic coating, coating, etc., can solve the problems of difficult catalyst carrier or functional material, poor chemical stability, small specific surface area, etc., to avoid electrolysis Breakdown, easy operation, good repeatability
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Embodiment 1
[0036] A kind of anodized aluminum film, its preparation method comprises the following steps:
[0037] 1) Clean the aluminum sheet with a purity of ≥99.99% with absolute ethanol and deionized water successively, then use the aluminum sheet as the anode and the graphite plate as the cathode, and mix the solution of perchloric acid and absolute ethanol at 0° C. Perchloric acid with a fraction of 71% and absolute ethanol are mixed according to the volume ratio of 0.3:1) to perform constant voltage electrochemical polishing, the voltage is 18V, and the polishing time is 8min, to obtain an electrochemically polished aluminum sheet;
[0038] 2) The aluminum sheet that has been electrochemically polished is used as the anode, the graphite plate is used as the cathode, and the nitric acid-ethanol-water mixed solution at -15°C (by the concentration of 0.35mol / L nitric acid aqueous solution and absolute ethanol according to the volume ratio 0.2: 1 mixed) is used as the electrolyte for ...
Embodiment 2
[0044] A kind of anodized aluminum film, its preparation method comprises the following steps:
[0045] 1) Clean the aluminum sheet with a purity of ≥99.99% with absolute ethanol and deionized water successively, then use the aluminum sheet as the anode and the graphite plate as the cathode, and mix the solution of perchloric acid and absolute ethanol at 0° C. Perchloric acid with a fraction of 71% and absolute ethanol are mixed according to the volume ratio of 0.5:1) to carry out constant voltage electrochemical polishing, the voltage is 20V, and the polishing time is 5min to obtain an electrochemically polished aluminum sheet;
[0046]2) The aluminum sheet that has been electrochemically polished is used as the anode, the graphite plate is used as the cathode, and the nitric acid-ethanol-water mixed solution at -20°C (by the concentration of 0.25mol / L nitric acid aqueous solution and absolute ethanol according to the volume ratio 0.25: 1 mixed) is used as the electrolyte for...
Embodiment 3
[0050] A kind of anodized aluminum film, its preparation method comprises the following steps:
[0051] 1) Clean the aluminum sheet with a purity of ≥99.99% with absolute ethanol and deionized water successively, then use the aluminum sheet as the anode and the graphite plate as the cathode, and mix the solution of perchloric acid and absolute ethanol at 0° C. Perchloric acid and absolute ethanol with a fraction of 71% were mixed according to the volume ratio of 0.4:1) to perform constant voltage electrochemical polishing, the voltage was 19V, and the polishing time was 6 minutes to obtain an electrochemically polished aluminum sheet;
[0052] 2) The aluminum sheet that has been electrochemically polished is used as the anode, the graphite plate is used as the cathode, and the nitric acid-ethanol-water mixed solution at -18°C (by the concentration of 0.3mol / L nitric acid aqueous solution and absolute ethanol according to the volume ratio 0.25: 1 mixed) is used as the electroly...
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