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What are the two Polishing Processes for Aluminum Alloy Die Castings?

What are the two Polishing Processes for Aluminum Alloy Die Castings?

Pulished on Apr. 01, 2020

The surface technology of aluminum alloy die-casting parts is rich and diverse, and the surface effect of aluminum alloy die-casting parts are very beautiful, and the surface effect is very fine. Let's take a look at the other two polishing processes of aluminum alloy die-casting parts with Aluminum Alloys Die Casting Parts Manufacturer.

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1. The alkaline electrolytic polishing process for aluminum alloy die castings

The research of alkaline polishing solution system was carried out, and the effects of corrosion inhibitors and viscosity agents on the polishing effect were compared. The alkaline solution system with good polishing effect was successfully obtained, and for the first time, it was possible to reduce the operating temperature and extend the use of the solution. Additives that improve the longevity and polishing effect. The experimental results show that adding appropriate additives to the NaOH solution can produce a good polishing effect. Exploratory experiments have also found that the surface reflectance of aluminum can reach 90% after DC constant pressure electrolytic polishing with NaOH solution of glucose under certain conditions, but due to the unstable factors in the experiment, further research is needed. The feasibility of using DC pulse electrolytic polishing method to polish aluminum under alkaline conditions was explored. The results show that the pulse electrolytic polishing method can achieve the leveling effect of DC constant pressure electrolytic polishing, but its leveling speed is slow.

2.Environment-friendly chemical polishing of aluminum alloy die-castings and aluminum alloys

It is determined to develop a new environmentally friendly chemical polishing technology using phosphoric acid monosulfuric acid as the base liquid. This technology should achieve zero emissions of NOx and overcome the quality defects of similar technologies in the past. The key to the new technology is to add some compounds with special effects in the base fluid to replace nitric acid. For this reason, the tri-acid chemical polishing process of aluminum needs to be analyzed first, and the role of nitric acid must be particularly studied. The main role of nitric acid in aluminum chemical polishing is to suppress pitting corrosion and improve polishing brightness. Combined with the chemical polishing test in pure phosphoric acid monosulfuric acid, it is believed that the special substance added in phosphoric acid monosulfuric acid should be able to inhibit pitting corrosion and slow down overall corrosion, and at the same time, it must have good leveling and bright effects.

Application of Precision Aluminum Die Casting Parts Aluminum material and aluminum alloy have good fluidity and plasticity, so it can make a variety of complex and difficult die castings. Castings made of aluminum alloy and metal aluminum have higher accuracy and Surface finish, which greatly reduces the amount of machining of castings, greatly reduces labor intensity, and saves electricity and metal materials. It has high internal quality and external quality. Aluminum die-casting parts are widely used in various industries such as automobile manufacturing, internal combustion engine production, motorcycle manufacturing, electric motor manufacturing, transmission machinery manufacturing, precision instruments, landscaping, power construction, etc. Become the new favorite of die-casting industry.

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