Aluminum alloy die-casting products are mainly used in electronics, automobiles, motors, home appliances and some communication industries. Some high-performance aluminum alloy products with high performance, high precision and high toughness are also used in industries with high requirements such as large aircraft and ships. The main use is also on the parts of some instruments.

Environmentally friendly chemical polishing of aluminum and aluminum alloys: The development of a new environmentally friendly chemical polishing technology based on phosphoric acid monosulfate, which achieves zero emissions of NOx and overcomes the quality defects of similar technologies in the past. The key to the new technology is to add some special-effect compounds to the base fluid instead of nitric acid. Combined with the chemical polishing test in simple mono-phosphoric acid, it is believed that the special substances added in the mono-phosphoric acid should be able to suppress pitting corrosion and alleviate general corrosion, and must have better leveling and brightening effects.

Aluminum phosphating: The effects of accelerator, fluoride, Mn2+, Ni2+, Zn2+, PO4 and Fe2+ on the phosphating process of aluminum were studied in detail by means of SEM, XRD, potential-time curve and membrane weight change. Studies have shown that cerium nitrate has the characteristics of good water solubility, low dosage and rapid film formation, and is an effective accelerator for phosphating of aluminum. With the increase of Zn2+ concentration, the membrane weight increased; PO4 content had a greater impact on the phosphating membrane and increased PO4. The content causes the phosphating film to increase in weight.

Electrochemical surface strengthening treatment of aluminum and its alloys: the process, properties, morphology, composition and structure of amorphous composite conversion coatings of aluminum and its alloys in a neutral system to form a ceramic-like amorphous composite conversion coating. Film formation process and mechanism. The results of the process research show that in the neutral mixed system of Na_2WO_4, the concentration of the film-forming accelerator is controlled to 2.5-3.0 g/, the neutral system has good adaptability to aluminum alloy, and various series such as rust-proof aluminum and forged aluminum. Good film formation on aluminum alloy.

Alkaline electrolytic polishing process of aluminum: 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 it was obtained for the first time. An additive that lowers operating temperature, extends solution life, and improves polishing. The feasibility of using DC pulse electropolishing method to polish aluminum under alkaline conditions was explored. The results show that the pulse electrolysis polishing method can achieve the leveling effect of DC constant pressure electropolishing, but its flattening speed is slow.