Aluminum profile spraying process
An aluminum profile and process technology, applied in coating, device for coating liquid on the surface, surface pretreatment, etc., can solve the problems of uneven paint surface, poor visual effect, and failure to reach customers on the surface of aluminum plate. The effect of high quality finished product, convenient processing and lower production cost
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Embodiment 1
[0024] Such as figure 1 Shown, a kind of aluminum profile spraying process comprises the following steps:
[0025] 1) Pickling and degreasing: Use 80% phosphoric acid solution to rinse the surface of the aluminum profile to remove the grease on the surface of the aluminum profile;
[0026] 2) Alkali cleaning: at room temperature, rinse the degreased aluminum profile with 100-200g / L NaOH for 2 minutes;
[0027] 3) Washing: washing with water;
[0028] 4) Passivation treatment: place the washed aluminum profile in 98% concentrated H 2 SO 4 As an anode in the solution, the anode is polarized with an external current to passivate the aluminum profile, and the current density is 6A / dm2;
[0029] 5) Alkali cleaning: at room temperature, rinse the degreased aluminum profile with 100g / L NaOH;
[0030] 6) Pure water washing: rinse the surface of the aluminum profile with pure water;
[0031] 7) Drying: Naturally air-dry at room temperature;
[0032] 8) Hanging: hang the dried al...
Embodiment 2
[0038] Such as figure 1 Shown, a kind of aluminum profile spraying process comprises the following steps:
[0039] 1) Pickling and degreasing: Use 80% phosphoric acid solution to rinse the surface of the aluminum profile to remove the grease on the surface of the aluminum profile;
[0040] 2) Alkali cleaning: at room temperature, rinse the degreased aluminum profile with 100g / L NaOH for 0.5min;
[0041] 3) Washing: washing with water;
[0042] 4) Passivation treatment: place the washed aluminum profile in 98% concentrated H 2 SO 4 As an anode in the solution, the anode is polarized with an external current to passivate the aluminum profile, and the current density is 4A / dm2;
[0043] 5) Alkali cleaning: at room temperature, rinse the degreased aluminum profile with 100g / L NaOH;
[0044] 6) Pure water washing: rinse the surface of the aluminum profile with pure water;
[0045] 7) Drying: Naturally air-dry at room temperature;
[0046] 8) Hanging: hang the dried aluminum ...
Embodiment 3
[0052] Such as figure 1 Shown, a kind of aluminum profile spraying process comprises the following steps:
[0053] 1) Pickling and degreasing: Use 80% phosphoric acid solution to rinse the surface of the aluminum profile to remove the grease on the surface of the aluminum profile;
[0054] 2) Alkali cleaning: at room temperature, rinse the degreased aluminum profile with 200g / L NaOH for 3 minutes;
[0055] 3) Washing: washing with water;
[0056] 4) Passivation treatment: place the washed aluminum profile in 98% concentrated H 2 SO 4 As an anode in the solution, the anode is polarized with an external current to passivate the aluminum profile, and the current density is 8A / dm2;
[0057] 5) Alkali cleaning: at room temperature, use 200g / L NaOH to rinse the degreased aluminum profile;
[0058] 6) Pure water washing: rinse the surface of the aluminum profile with pure water;
[0059] 7) Drying: Naturally air-dry at room temperature;
[0060] 8) Hanging: hang the dried alum...
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