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Anodic oxidation process for 7-series aluminum alloy

An anodizing, aluminum alloy technology, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of limited dyeable color, high power consumption, bright appearance, etc., to achieve strong processing ability, The effect of uniform pores in the oxide film and simple process

Inactive Publication Date: 2016-06-15
GUANGDONG WEILV ALUMINUM IND CO LTD
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Problems solved by technology

[0004] The anodic oxidation process requires high voltage (25-100V) and low temperature (0°C-5°C), resulting in high power consumption. Several colors such as black and primary colors cannot get a very bright appearance, which greatly limits the colors that can be dyed

Method used

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Embodiment 2

[0065] An anodic oxidation process for 7-series aluminum alloys, comprising the following steps in turn: degreasing treatment—first peeling treatment—chemical polishing treatment—second peeling treatment—anodizing treatment—pre-dyeing treatment—dyeing—sealing Hole treatment, specifically:

[0066] (1) Degreasing treatment: Sand blast the 7 series aluminum alloy material. After the treatment, degrease with a weakly alkaline degreasing agent of trisodium phosphate. The conditions are: the degreasing concentration is 60g / L, the temperature is 60°C, and the soaking time After soaking for 3 minutes, wash with clean water several times to remove the degreasing agent remaining on the surface, and obtain the 7-series aluminum alloy material a;

[0067] (2) The first peeling treatment: Use nitric acid to perform the first peeling treatment on the 7-series aluminum alloy material a, the conditions are: the concentration of nitric acid is 300g / L, at room temperature, and the immersion ti...

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Abstract

The invention discloses an anodic oxidation process for 7-series aluminum alloys, relates to the technical field of metal surface treatment, and in particular to an anodic oxidation process for 7-series aluminum alloys, comprising the following steps in sequence: degreasing treatment-first film peeling Treatment—Chemical Polishing—Second Stripping Treatment—Anodizing Treatment—Dyeing Pretreatment—Dyeing—Sealing Treatment. This anodizing process requires low voltage, high temperature, large power consumption, and good uniformity of oxide film pores. According to different dyeing conditions, the appearance of various colors can be obtained. The process is simple, the process capacity is strong, the production efficiency is high, and it is suitable for batch industrial production.

Description

technical field [0001] The invention discloses an anodic oxidation process for 7-series aluminum alloys, relates to the technical field of metal surface treatment, and in particular relates to an anodic oxidation process for 7-series aluminum alloys. technical background [0002] In order to overcome the defects of aluminum alloy surface hardness, wear resistance, etc., expand the scope of application, and prolong the service life, surface treatment technology has become an indispensable part of the use of aluminum alloys, and anodic oxidation technology is currently the most widely used and most successful. of. [0003] The composition of the 7 series aluminum alloy is (mass percentage) Zn5.0%~6.1%, Mg2.3%~2.8%, Cu1.4%~1.8%, Si0.3%~0.4%, Fe0.3% ~0.35%, Mn<0.3%, Cr0.18%~0.28%, Ti<0.2%, other impurities <0.15%, and the rest is Al. At present, the anodic oxidation of 7 series aluminum alloy mainly adopts hard oxidation process, and the commonly used processes includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04C25D11/14
CPCC25D11/04C25D11/14
Inventor 李育民张之岭张伟
Owner GUANGDONG WEILV ALUMINUM IND CO LTD
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