Film removal agent and film removal method for aluminum high light mobile phone middle frame surface anode oxide film

Abstract

The invention provides a film removal agent and a film removal method for a aluminum high light mobile phone middle frame surface anode oxide film. The film removal agent comprises the following massportion components of 1 part to 10 parts of inorganic base, 1 part to10 parts of complexing agent, 1 part to 10 parts of penetrating agent and 0.1 part to 1 part of brightener. The film removal methodcomprises the following steps of S1), degreasing and oil removing treatment, S2), anode oxide film removal treatment, S3), neutralization and ash removal treatment, and S4) drying treatment. According to the film removal agent and the film removal method for the aluminum high light mobile phone middle frame surface anode oxide film, not only the oxide film on a product surface is quickly removed,but also the product surface does not be damaged; after the film removal treatment is finished, the product surface has the advantages that the high gloss surface does not be damaged, over reaction does not cause corrosion to the aluminum alloy surface, and the requirements that the air tightness test is qualified in the enterprise production are met; and the film removal agent does not contain chromate, fluoride, nitrate, phosphate and other medicament that pollute the environment, the environmental protection requirements are fully met, and waste liquid can be discharged after simple neutralization.

Description

technical field [0001] The invention relates to the technical field of mold release for electronic products, in particular to a release agent for anodized film on the surface of an aluminum high-gloss mobile phone middle frame and a release method thereof. Background technique [0002] At present, aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Among them, the seven-series aluminum alloy is widely used in aircraft parts, missile parts, truck ship parts and other devices that require strength. In recent years, it has been widely used in the 3C electronics industry. Most electronics companies choose Seven-series aluminum alloys are used as smart electronic components. [0003] Among them, anodizing treatment is an indispensable and important link in the pretreatment process of seven-series aluminum alloys. Therefor...

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Problems solved by technology

[0003] Among them, anodizing treatment is an indispensable and important link in the pretreatment process of seven-series aluminum alloys. Therefore, the treatment of defective products after anodizing has become a major issue that enterprises need to consider in production. Among them, especially the surface of seven-series high-gloss aluminum alloys The stripping treatment of anodized film is more difficult. Traditional acidic systems such as phosphoric acid, chromic anhydride, and ammonium bifluoride system stripping agents have gradually faded out of the market due to reasons such as non-environmental protection. Some researchers have developed acidic stripping agents for phosphate molybdate systems. agent, not only for a long time and high temperature, but also will affect the high-gloss surface of the seven-series high-gloss aluminum alloy, because the phosphate protective film formed after the stripping treatment will cause the surface of the high-gloss aluminum alloy to participate in the reaction, and then after anodic oxidation treatment, it will be Obvious dense bright pits can be seen on the high-gloss surface, which cannot meet the rework operation

[0004] The traditional alkaline system release agent may be effective for the less demanding five-series or some six-series products, but in recent years, large electronic product manufacturers have chosen seven-series aluminum alloys, so the traditional alkaline release agent When the oxide film on the aluminum alloy surface is removed, the surface will be severely corroded, and if it is a seven-series high-gloss aluminum alloy, the corrosion of the high-gloss surface will appear foggy, and the surface of the aluminum alloy will also be severely corroded; The film agent has a large amount of erosion on the surface of the substrate, which cannot meet the air tightness test requirements of production

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