Novel method for anodic oxidation of beryllium aluminum alloy

Abstract

The invention discloses a novel method for anodic oxidation of a beryllium aluminum alloy material, and belongs to the field of alloy materials. The method is composed of the following steps that (1),the surface of the beryllium aluminum alloy is treated in a machining manner so as to improve the surface smoothness, and then is repeatedly washed with deionized water to be clean; (2), the beryllium aluminum alloy material subjected to the surface treatment is soaked with an organic solution for 5-10 minutes to remove oil; (3), a chemical oil removal process is carried out on the beryllium aluminum alloy material, and the duration time is 10-15 seconds; (4), chemical polishing is carried out on the surface of the beryllium aluminum alloy by utilizing an acidic solution, wherein the polishing time is 10-15 seconds; (5), a proper cathode and anode area ratio is determined, a proper rack is selected to fix an anode, a proper interelectrode distance is selected to fix the positions of the two poles, and then an anodic oxidation process is started; and (6), hole sealing is carried out by adopting a potassium dichromate solution after the oxidation process is finished. According to the method, anodic oxidation is carried out on the surface of the beryllium aluminum alloy, so that the corrosion tendency of the beryllium aluminum alloy is prevented and reduced, and the corrosion resistance and the surface performance of the beryllium aluminum alloy are improved.

Description

Technical field [0001] The invention belongs to the field of surface protection of alloy materials, and particularly relates to a new method of anodic oxidation for surface protection of beryllium aluminum alloy materials. Background technique [0002] Beryllium aluminum alloy is widely used as a new aviation product due to its excellent physical properties. The user's product is used in a special environment. The moisture in the air condenses on the metal surface to make the electrolyte solution exist, which provides conditions for electrochemical corrosion. Based on the current status of enterprise aviation product research and development, in order to prevent and reduce the corrosion tendency of beryllium aluminum alloy and improve the corrosion resistance and surface performance of beryllium aluminum alloy, the experimental research on the surface protection process of beryllium aluminum alloy anodizing has very practical significance. The two phases of beryllium and aluminum...

AI Technical Summary

Problems solved by technology

The process description in the above patent applications and technical publications is not clear, and the main solvent chromic anhydride used is carcinogenic to the human body. Strict protection requirements must be followed in the actual production process, which objectively increases the operating cost of the actual process.

Images