Method of preparing copper-based microcrystal coating of aluminum alloy
An aluminum alloy and microcrystalline technology, applied in the field of materials, can solve the problems of slow growth rate, complicated post-processing, complicated process, etc., and achieve the effects of simple operation, beautiful appearance and reducing environmental pollution.
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Embodiment 1
[0016] Put the aluminum substrate in water, and use a membrane-type air pressure ion exchanger for electrolysis, control the conductivity of the water to 20~μS / cm, then add emulsifier OP to the water, control the concentration of OP in the water to 5mg / L, Analyze for 1h to obtain a conductive aluminum matrix;
[0017] Place the conductive aluminum matrix in the stress relief solution, soak for 30 hours, then take out water to clean the surface, and then dry it at 220°C for 15 hours to obtain the stress relief aluminum matrix; in the stress relief solution, bis-octylsuccinic acid The sodium concentration is 12g / L, and the concentration of sodium metasilicate is 12 g / L;
[0018] Put the stress-relieving aluminum matrix into the degreasing solution, and add OP to the degreasing solution at a temperature of 75°C under stirring conditions, until the concentration of OP is 1g / L, keep it warm for 35min, and then take it out with water at a temperature of 60±5°C. The surface is clean...
Embodiment 2
[0022] Method is with embodiment 1, and difference is:
[0023] Control the conductivity of water to 30μS / cm, control the concentration of OP to 4mg / L, and conduct electrolysis for 3h;
[0024] Soak in the stress relief solution for 35 hours, and dry at 160°C for 18 hours; the concentration of sodium dioctylsuccinate in the stress relief solution is 30 g / L, and the concentration of sodium metasilicate is 32 g / L;
[0025] At the temperature of the degreasing solution at 65°C, the concentration of OP is 2g / L, the temperature is kept for 30min, the surface is washed with normal temperature water for 4min, the concentration of disodium cocoamphodipropionate in the degreasing solution is 40g / L, and the concentration of Pingping is 20g / L;
[0026] The preform temperature is 50°C, and the current density is 4A / dm 2 Under the condition of processing 25s, the concentration of nickel sulfate in the prefabricated solution is 200 g / L, the concentration of sodium citrate is 150 g / L, and t...
Embodiment 3
[0029] Method is with embodiment 1, and difference is:
[0030] Control the conductivity of water to 40μS / cm, control the concentration of OP to 3mg / L, and conduct electrolysis for 5h;
[0031] Soak in the stress relief solution for 40 hours, and dry at 120°C for 20 hours; the concentration of sodium bisoctylsuccinate in the stress relief solution is 45 g / L, and the concentration of sodium metasilicate is 50 g / L;
[0032] At the temperature of the degreasing solution at 55°C, the concentration of OP is 3 g / L, the temperature is kept for 20 minutes, and the surface is washed with normal temperature water for 5 minutes. L;
[0033] The preform temperature is 40°C, and the current density is 5A / dm 2 Under the conditions of treatment for 20s, the concentration of nickel sulfate in the prefabricated solution is 1300 g / L, the concentration of sodium citrate is 50 g / L, and the concentration of boric acid is 150 g / L;
[0034] The temperature of the microcrystal treatment solution i...
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