Sulfuric acid-boric acid-additive ternary anodizing fluid
An anodizing and additive technology, applied in anodizing and other directions, can solve problems such as fatigue fracture and corrosion failure, and achieve the effect of satisfying the corrosion resistance of the film layer, reducing the current concentration tendency, and reducing the control accuracy requirements.
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Embodiment 1
[0033] 1. The test material is brand 2024 bare aluminum plate, the heat treatment system is T3 (2024-T3), and the size is 100mm×50mm×2.5mm;
[0034] 2. The anodizing bath solution is 100ml of deionized water, adding 2ml of H with a mass percentage concentration of 98%. 2 SO 4 , 0.2g of boric acid and 10mg of benzotriazole corrosion inhibitor;
[0035] Three, the specific steps are
[0036] Alkali washing step: immerse in NaOH aqueous solution at 55°C for 2 minutes to take it out, and rinse the surface of the sample with water; NaOH aqueous solution is 100ml of tap water with 5.5g of NaOH added;
[0037] Light-emitting step: put the sample treated by the alkali washing step into the three-acid light-emitting solution at 20°C for 2 minutes, take it out, and rinse the surface of the sample with deionized water; add 5g of CrO to 100ml of the three-acid light-emitting solution 3 , 8ml of HNO 3 , 1 ml of HF. CrO 3 For analytical purity. HNO 3 The mass percent concentration i...
Embodiment 2
[0048] 1. The test material is brand 2024 bare aluminum plate, the heat treatment system is T3 (2024-T3), and the size is 100mm×50mm×2.5mm;
[0049] Two, the anodic oxidation tank solution is the 2-mercaptobenzothiazole corrosion inhibitor of 4ml of H2SO4, 0.5g of boric acid and 50mg of mass percentage concentration added in the deionized water of 100ml;
[0050] Three, the specific steps are
[0051] Alkaline washing step: immerse in NaOH aqueous solution at a temperature of 50°C for 2 minutes to take it out, and rinse the surface of the sample with water; the NaOH aqueous solution is 100ml of tap water with 6g of NaOH added;
[0052] Light-emitting step: put the sample treated by the alkali washing step into the tri-acid light-emitting solution at 25°C for 1 min, take it out, and rinse the surface of the sample with deionized water; add 6g of CrO to 100ml of the three-acid light-emitting solution 3 , 6ml of HNO 3 , 0.8ml of HF. HNO 3 The mass percent concentration is 65%...
Embodiment 3
[0061] 1. The test material is 7050 bare aluminum plate, the heat treatment system is T7451 (7050-T7451), and the size is 100mm×50mm×4mm;
[0062] 2. The anodizing bath solution is 100ml of deionized water, adding 6ml of H with a mass percentage concentration of 98%. 2 SO 4 , 0.8g of boric acid and 70mg of 8-hydroxyquinoline corrosion inhibitor;
[0063] Three, the specific steps are
[0064] Alkaline washing step: immerse in NaOH aqueous solution at a temperature of 60°C for 1min to take it out, and rinse the surface of the sample with water; NaOH aqueous solution is 100ml of tap water with 5.5g of NaOH added;
[0065] Light-emitting step: put the sample treated by the alkali washing step into the three-acid light-emitting solution at a temperature of 15°C for 3 minutes, take it out, and rinse the surface of the sample with deionized water; add 4g of CrO 3 , 7ml of HNO 3 , 1.2ml of HF. HNO 3 The mass percent concentration is 65%. The mass percent concentration of HF i...
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