What are the main characteristics and application range of hard aluminum alloys? Due to the advantages of low relative density, light weight, and high strength, hard aluminum alloys are widely used in aerospace and other fields. Their surface treatment often uses sulfuric acid anodizing technology with relatively low cost and good film quality.
However, due to various reasons, surface white spots often appear on hard aluminum alloy after sulfuric acid anodizing and black filling, which affects the appearance quality of the parts. This phenomenon is occasional and irregular. From the analysis of data collected in production, it can be seen that the surface of machined hard aluminum alloy parts has more white spots. To improve product quality and solve the problem of white spots on the surface of aluminum alloy anodizing, it is necessary to identify the causes and propose solutions.
This type of alloy has good strength and heat resistance, but its corrosion resistance is not as good as pure aluminum and rust resistant aluminum alloys. The commonly used aluminum coating method improves the corrosion resistance of hard aluminum products in marine and humid atmospheres.
This type of alloy is widely used in various components and rivet materials. It is also widely used in shipbuilding, construction and other departments. Adding iron and nickel to the aluminum copper magnesium system can develop into forged alloys with good high-temperature strength and process performance. The aluminum copper manganese alloy has good process performance and is easy to weld, mainly used for heat-resistant and weldable structural materials and forgings. Melting method ingot, then pressure processing into material. Density slightly higher than aluminum
