How to treat aluminum alloy die casting metal surface?
How much do you know about the surface treatment of hard chrome electroplating process for aluminum alloy die casting? The surface treatment technology of aluminum alloy die casting is in high demand in the market, especially the hard chrome plating process. Why is the hard chrome plating process of aluminum alloy die casting so popular? First look briefly at the surface treatment of aluminum alloy die - cast block metal.
What do you know about the surface treatment ofaluminum alloy die-castinghard chromium electroplating process? The surface treatment technology of aluminum alloy die-casting metal has a high demand in the market, especially hard chromium electroplating process. Why is the hard chromium electroplating process of aluminum alloy die-casting so popular? First, let's take a brief look at the surface treatment method of aluminum alloy die-casting block metal.
and environmental chemical polishing of aluminum and aluminum alloys.
Make clear Develop a new energy-saving chemical polishing technology based on phosphoric acid sulfuric acid. In this technology, to achieve zero emission of nitrogen oxides and get rid of the quality defects of similar technologies in the past, the key to the new technology is to add some chemicals with special effects in the basic solution to replace nitrate. Therefore, it is necessary to analyze the tri acid chemical polishing process of aluminum, especially the effect of nitric acid. The main effect of nitric acid in aluminum chemical polishing is to inhibit pitting and improve polishing glossiness. Combined with the chemical polishing experiment in pure phosphoric acid sulfuric acid, it is believed that the special chemicals added in phosphoric acid sulfuric acid should be able to inhibit pitting and reduce overall corrosion, At the same time, it must have a good leveling and lighting effect p>
Electrochemical surface strengthening treatment of aluminum alloy p>
and the process, properties, morphology, composition and structure of ceramic like amorphous composite conversion film formed by anodic oxidation deposition of aluminum in neutral system. The results of the process study show that_ 2WO_ 4, the concentration of film forming accelerator is controlled at 2.5 ~3.0g/L, the concentration of complexing membrane agent is controlled at 1.5~3.0g/L, Na_ 2WO_ The concentration of 4 is 0.5~0.8g/L, and the peak current density is 6~12a/DM~ 2. Under weak stirring, a complete, uniform and glossy gray inorganic non-metallic film with a thickness of 5~10 can be obtained μ m. The micro strength is 300~540 HV has excellent corrosion resistance. The neutral system has good adaptability to aluminum alloy and can prevent aluminum from rusting p>