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Beryllium aluminum alloy and preparation method thereof

A technology of beryllium aluminum alloy and anodic oxidation film, which is applied in the direction of electrolytic coating, surface reaction electrolytic coating, anodic oxidation, etc., can solve the problems that beryllium aluminum alloy does not satisfy, does not have matting function, etc., and achieves the effect of uniform and stable color

Inactive Publication Date: 2018-03-06
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the technical problem that the existing prepared beryllium aluminum alloy does not meet the requirements of the existing optical structural parts, and does not have the extinction function, and provides a beryllium aluminum alloy with stronger corrosion resistance and extinction function and its preparation method, the method is simple and easy to implement, and the colored anodic oxidation film obtained is uniform and continuous, without partial non-film formation, no shedding, no local powdering, fading and other phenomena, the color is uniform and stable, and has high application value

Method used

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preparation example Construction

[0032] At the same time, the present invention also provides the preparation method of the above-mentioned beryllium aluminum alloy, the steps of which include: subjecting the beryllium aluminum alloy precursor to be treated to S1, alkali washing; S2, pickling; S3, acid erosion; S4, anodic oxidation; S5, heating Washing; S6, dyeing; S7, sealing the beryllium aluminum alloy.

[0033] The present invention can color the beryllium-aluminum alloy well by first washing with alkali, then pickling, and finally acid-etching, then anodizing and dyeing, and the prepared beryllium-aluminum alloy has stronger corrosion resistance and better extinction Function, the formed colored anodic oxidation film is uniform and continuous, without partial non-film formation, no shedding, no local powdering, fading and other phenomena, the color is uniform and stable, and the light fastness can reach 7-8 through ultraviolet irradiation experiments. After nitric acid pre-soaking, soaking in phosphorus-...

Embodiment 1

[0045] The beryllium-aluminum alloy precursor to be treated is immersed in an alkaline washing solution for cleaning. The alkaline washing solution includes 30g / L sodium carbonate, 20g / L sodium phosphate and 30g / L sodium hydroxide, the temperature is 60°C, and the cleaning time is 10 Seconds, then cleaned with deionized water, then immersed in a mixed acid solution containing 100g / L sulfuric acid and 50g / L chromic anhydride for 5 seconds, then cleaned with deionized water, and then immersed in acid etching solution for 3 seconds, Acid etching liquid is the mixed acid of the hydrofluoric acid of 40wt% nitric acid and 10ml / L, washes with deionized water at normal temperature subsequently, immerses in the anodic oxidation tank afterwards, electrolyte comprises chromic anhydride, boric acid and citric acid in the anodic oxidation tank, adjust Current up to 2.5A / dm 2 , constant flow oxidation for 45 minutes, followed by rinsing with hot water at 60°C for 1 minute, immersing the ber...

Embodiment 2

[0048] Dip the beryllium-aluminum alloy precursor to be treated into an alkaline cleaning solution, the alkaline cleaning solution includes 30g / L sodium carbonate, 20g / L sodium phosphate and 30g / L sodium hydroxide, the temperature is 70°C, and the cleaning time is 20 Seconds, then cleaned with deionized water, then immersed in a mixed acid solution containing 100g / L sulfuric acid and 50g / L chromic anhydride for 10 seconds, then cleaned with deionized water, and then immersed in acid etching solution for 5 seconds, Acid etching liquid is the mixed acid of the hydrofluoric acid of 40wt% nitric acid and 10ml / L, washes with deionized water at normal temperature subsequently, immerses in the anodic oxidation tank afterwards, electrolyte comprises chromic anhydride, boric acid and citric acid in the anodic oxidation tank, adjust Current up to 2.5A / dm 2 , constant flow oxidation for 60 minutes, followed by washing with hot water at 60°C for 2 minutes, immersing the beryllium aluminum...

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Abstract

The invention relates to the field of beryllium aluminum alloy, and particularly discloses beryllium aluminum alloy and a preparation method thereof. The beryllium aluminum alloy comprises a berylliumaluminum alloy matrix and a colored anode oxide film positioned on the surface of the beryllium aluminum alloy matrix. The method comprises the following steps: S1, performing alkaline cleaning on aberyllium aluminum alloy precursor to be treated; S2, performing acid cleaning; S3, performing acid attack; S4, performing anodic oxidation; S5, performing hot water rinsing; S6, dyeing; S7, performing sealing, so as to obtain the beryllium aluminum alloy. The obtained beryllium aluminum alloy is higher in corrosion resistance, has good extinction function, and is more applicable to optical structure elements.

Description

technical field [0001] The invention relates to the field of beryllium aluminum alloys, in particular to a beryllium aluminum alloy and a preparation method thereof. Background technique [0002] Beryllium aluminum alloy has the characteristics of light weight, high specific strength, high specific stiffness, good thermal stability, high toughness, and corrosion resistance. It combines many excellent characteristics such as low density of beryllium and easy processability of aluminum. It has broad application prospects in manufacturing, automotive fields and high-precision, high-speed electric welding machine manufacturing industries, and has become an increasingly important new material. Due to the inherent characteristics of the aluminum phase in the alloy, beryllium aluminum alloy has wear resistance The constraints of insufficient hardness and corrosion resistance limit the application of beryllium aluminum alloys, especially when beryllium aluminum alloys are used as op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/08C25D11/10C25D11/18
CPCC25D11/16C25D11/08C25D11/10C25D11/18
Inventor 张继真姚远谢晓麟谭双龙徐放王哈
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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