Deplating solution and method for aluminium alloy
A technology of deplating solution and aluminum alloy, which is applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., which can solve the problems of high production cost, complicated processing process, and few breakthroughs in direct deplating and rework of secondary high-gloss anodes. , to achieve the effect of reducing rework cost and scrap rate
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Embodiment 1
[0026] The content of the following components: sodium hydroxide 20g / L, sodium metaaluminate 15g / L, triethanolamine 25ml / L, ammonium chloride 15g / L, sodium bicarbonate 5g / L, ammonium sulfate 20g / L, ammonium molybdate Take 5g / L stripping solution as an example.
[0027] First, the deplating solution is configured according to the above-mentioned component content, and then the aluminum alloy shell is immersed in the deplating solution for deplating treatment to remove the high-gloss anode film layer. No voltage is applied during the deplating process, and the bubbling method is used. Deplating treatment is carried out in a manner, wherein the deplating temperature is controlled at 60° C. to 80° C., and the time is controlled at 15 to 40 s. The traditional post-treatment process is carried out on the aluminum alloy casing after deplating treatment, comprising the following steps: again immersing the aluminum alloy casing in a nitric acid solution to neutralize the residual depla...
Embodiment 2
[0030] The deplating method steps and post-treatment process steps of this embodiment are the same as in Example 1, and the difference from Example 1 is that the composition content of the deplating solution used is different. In this embodiment, the deplating solution provided The components of the plating solution are sodium hydroxide 25g / L, sodium metaaluminate 11g / L, triethanolamine 30ml / L, ammonium chloride 18g / L, sodium bicarbonate 4g / L, ammonium sulfate 25g / L, ammonium molybdate 8g / L.
[0031] According to the relevant test standards, the parameters of the aluminum alloy casing after the above process are tested, including gloss, roughness, film thickness and color difference. The test results are shown in Table 1.
Embodiment 3
[0033] The deplating method steps and post-treatment process steps of this embodiment are the same as in Example 1, and the difference from Example 1 is that the composition content of the deplating solution used is different. In this embodiment, the deplating solution provided The components of the plating solution are sodium hydroxide 30g / L, sodium metaaluminate 8g / L, triethanolamine 35ml / L, ammonium chloride 20g / L, sodium bicarbonate 3g / L, ammonium sulfate 30g / L, ammonium molybdate 10g / L.
[0034] According to the relevant test standards, the parameters of the aluminum alloy casing after the above process are tested, including gloss, roughness, film thickness and color difference. The test results are shown in Table 1.
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