Anti-aging aluminum alloy and preparation method thereof
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An aluminum alloy, anti-aging technology, applied in the direction of anodic oxidation, coating, hyaluronic acid coating, etc., to achieve the effect of preventing electrochemical corrosion, good compatibility and high thermal stability
Pending Publication Date: 2022-06-10
瑞晟通金属(广东)有限公司
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However, the surface of boron nitride lacks functional groups that can undergo chemical reactions. It is chemically inert and has poor compatibility with polymers, which is not conducive to the dispersion in polymers.
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Embodiment 1
[0032] In the preparation method of the modified boron nitride, the rotation speed of the stirrer in step S22 is 35000r / min.
[0033] In the preparation method of the modified boron nitride, the temperature of the vacuum drying oven in both step S21 and step S22 is 70° C., and the drying time is 12 hours.
[0034] Comparative example 1
[0035] A kind of anti-aging aluminum alloy, its preparation method comprises the following steps:
[0036] The volume ratio of perchloric acid and ethanol in the described perchloric acid ethanol solution is: 4:1;
[0037] The preparation method of described modified boron nitride comprises the following steps:
[0038] In the preparation method of the modified boron nitride, the speed of the mixer in step S22 is 25000r / min;
[0039] Comparative example 2
[0040] A kind of anti-aging aluminum alloy, its preparation method comprises the following steps:
[0041] The volume ratio of perchloric acid and ethanol in the described perchloric a...
Embodiment 2
[0050] The anti-aging ability of the aluminum alloy is tested by the constant current corrosion weight loss method, and the experimental conditions are: in the water environment of 75°C, 0.3A / cm 2 The current was charged at a constant current for 100 hours, and then compared using the weight loss method. The test results are shown in Table 1.
[0051] Table 1 Performance test results
[0052] In addition, it can also be seen from the test results of Examples 1-3 that different proportions of coating components can affect the anti-aging effect of the anti-aging aluminum alloy, and Example 1 is the best proportion.
[0053] From the test results of Example 1 and Comparative Example 1, it can be seen that the anti-aging ability of the aluminum alloy with anodic oxidation treatment is significantly improved compared with the untreated aluminum alloy.
[0054] From the test results of Example 1 and Comparative Example 2, it can be known that adding boron nitride to the coating, th...
Embodiment 3
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Abstract
The preparation method comprises the following steps that S1, pretreatment is conducted, specifically, an aluminum alloy matrix is polished, grease and other impurities on the surface of a metal sheet are removed, cleaning and blow-drying are conducted, and the metal sheet is obtained; s2, electrochemical polishing: respectively connecting a platinum electrode and a metal sheet to a negative electrode and a positive electrode of a constant potential rectifier, and putting into a perchloric acid ethanol solution; polishing is conducted for 2-4 min under the voltage of 19-21 V, and cleaning and blow-drying are conducted for standby application; s3, aluminum alloy surface treatment is conducted, specifically, a platinum electrode and the polished aluminum alloy are connected to the negative electrode and the positive electrode of a constant potential rectifier respectively and immersed in a phosphoric acid solution, then the device is placed in a constant-temperature water bath at the temperature of 60 DEG C, 25-35 V is applied between the two electrodes, anodic oxidation is conducted for 18-22 min, and cleaning and blow-drying are conducted for standby application; and S4, post-treatment is conducted, specifically, the surface of the treated aluminum alloy is evenly coated with paint through a conventional brush coating method, then the treated aluminum alloy is placed in a vacuum drying box at the temperature of 60 DEG C to be dried for 12 h, and degassing curing is conducted at the room temperature for 7 d. The anti-aging aluminum alloy not only has anti-aging capability, but also has excellent corrosion resistance.
Description
technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to an anti-aging aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is widely used in various fields due to its low density, excellent mechanical properties, strong electrical and thermal conductivity, good formability and excellent physical and chemical comprehensive properties. The disadvantage is that the aging resistance is not high, and the surface is easy to absorb air. The water in the water forms a water film, and the impurities in the air or on the human body dissolve in this water film to form an electrolyte solution, and electrochemical corrosion occurs, especially the Cl in the impurity － The existence of the aluminum alloy can destroy the passivation film, thereby causing localized corrosion such as pitting corrosion, which seriously affects the performance and safety performance of the material. Anodizing and painting ...
Claims
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