Anode oxidation pretreatment method for aluminium alloy
An anodizing and aluminum alloy technology, applied in the field of anodizing pre-treatment of aluminum alloy, can solve the problems of dark corrosion surface and pollution of electrophoresis tank, and achieve the effect of strong mechanical patterning ability, low aluminum consumption and fast sanding.
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Embodiment 1
[0034] The pre-treatment method of anodic oxidation of aluminum alloy includes the following methods and substances:
[0035] (1) Degreasing and dewaxing;
[0036] The composition of the bath liquid is: the degreasing and dewaxing agent is 140g / l, the working temperature is 10°C, and the working time is 3 minutes; the degreasing and dewaxing agent is composed of the following substances:
[0037] h 2 SO 4 43g / l,H 3 PO 4 35g / l, HNO 3 30g / l, behenyl alcohol 10g / l, acetic acid 7g / l, NH 4 HF 2 19g / l, Tx-10 0.1g / l, balance water;
[0038] (2) washing with water;
[0039] (3) brightening acid etching;
[0040] The composition of the bath solution is: brightening acid etching agent 160g / l, ammonium bifluoride 60g / l, pH=3.5, working temperature is 30°C, and treatment time is 10 minutes; brightening etching agent is composed of the following substances:
[0041] (NH 4 )H 2 PO 4 13g / l, behenyl alcohol 9g / l, NH 4 BF 4 28g / l, tartaric acid 28g / l, balance water;
[00...
Embodiment 2
[0052] The pretreatment method of aluminum alloy comprises the following steps:
[0053] (1) Degreasing and dewaxing;
[0054]The composition of the bath solution is: the degreasing and dewaxing agent is 150g / l, the working temperature is 25°C, and the working time is 2 minutes; the degreasing and dewaxing agent is composed of the following substances:
[0055] h 2 SO 4 38g / l,H 3 PO 4 31g / l, HNO 3 35g / l, behenyl alcohol 8g / l, acetic acid 6g / l, NH 4 HF 2 16g / lTx-10 0.3g / l, balance water;
[0056] (2) washing with water;
[0057] (3) brightening acid etching;
[0058] The composition of the bath solution is: brightening acid etching agent 180g / l, ammonium bifluoride 70g / l, pH=3.3, working temperature is 35°C, and treatment time is 9 minutes; brightening etching agent is composed of the following substances:
[0059] (NH 4 )H 2 PO 4 12g / l, behenyl alcohol 8g / l, NH 4 BF 4 23g / l, tartaric acid 22g / l, balance water;
[0060] (4) acid etching bright;
[0061] T...
Embodiment 3
[0070] The pretreatment method of aluminum alloy comprises the following steps:
[0071] (1) Degreasing and dewaxing;
[0072] The composition of the bath liquid is: the degreasing and dewaxing agent is 160g / l, the working temperature is 40°C, and the working time is 2 minutes; the degreasing and dewaxing agent is composed of the following substances:
[0073] h 2 SO 4 32g / l,H 3 PO 4 21g / l, HNO 3 25g / l, behenyl alcohol 7g / l, acetic acid 6g / l, NH 4 HF 2 11g / l, Tx-10 0.3g / l, balance water;
[0074] (2) washing with water;
[0075] (3) brightening acid etching;
[0076] The composition of the bath solution is: brightening acid etching agent 200g / l, ammonium bifluoride 80g / l, pH=3.0, working temperature is 40°C, and treatment time is 7 minutes; brightening acid etching agent is composed of the following substances:
[0077] (NH 4 )H 2 PO 4 9g / l, behenyl alcohol 8g / l, NH 4 BF 4 15g / l, tartaric acid 20g / l, balance water;
[0078] (4) acid etching bright;
[00...
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