Aluminum alloy surface treatment methods, namely, surface treatment process: spraying, paint, plating, anodizing, infiltration, fuel injection, sandblasting.
Spray: the use of pressure or electrostatic force to paint or powder attached to the surface of the workpiece, so that the workpiece has anti-corrosion and the appearance of decorative effect.
Paint: Primer on the substrate, topcoat, every time the paint, are sent to the dust-free temperature barn, baking.
Electroplating: the process of attaching a layer of metal to the surface of a metal or other material by electrolysis. Can play to prevent corrosion, improve wear resistance, conductivity, reflective and enhance the role of aesthetics.
Anodizing: Electrochemical oxidation of metals or alloys. An oxide film is formed on the surface of the metal or alloy as an anode by electrolysis. Metal oxide films change the surface state and performance, such as surface coloring, improve corrosion resistance, enhance wear resistance and hardness, protect the metal surface.
Infiltration: is a microporous (slit) infiltration sealing process. The sealing medium (usually low viscosity liquid) is infiltrated into the pores (slits) by means of natural permeation (i.e., microporous self-priming), vacuuming and pressurization, and the gap is filled and then cooled by natural (room temperature) Or heating methods such as the gap in the sealing medium curing, to seal the role of the gap.
Fuel: spray the paint on the surface of the product, naturally dry.
Sandblasting: the use of compressed air as the driving force to form a high-speed jet beam will spray (copper ore, quartz sand, emery, iron sand, sea sand) high-speed jet to be processed surface, so that the surface of the workpiece surface Or the shape of the change, due to the impact of the surface of the workpiece on the workpiece and cutting the role of the workpiece surface to obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the workpiece surface is improved, thus improving the workpiece fatigue resistance, The adhesion between it and the coating, extending the durability of the coating, but also conducive to the leveling and decoration of the paint.
Aluminum and aluminum alloy compared with other metal materials, has the following characteristics:
1, The density is small Aluminum and aluminum alloy density close to 2.7g /, about iron or copper 1/3.
2, High strength Aluminum and aluminum alloys have high strength. After a certain degree of cold processing can strengthen the matrix strength, part of the grade of aluminum can also be enhanced by heat treatment.
3, Good thermal conductivity The thermal conductivity of aluminum is second only to silver, copper and gold.
4, Good corrosion resistance the surface of aluminum is easy to produce a layer of dense and solid AL2O3 protective film, can protect the substrate from corrosion. Through the artificial anodizing and coloring, can obtain good casting performance of cast aluminum alloy or processing plastic deformation of aluminum alloy.
5, Easy processing Add a certain amount of alloying elements, you can get a good casting performance of the cast aluminum alloy or good plastic deformation of the deformation of aluminum.