Talking about surface pretreatment of 3004 aluminum strip

Aluminum strips are mainly used for processing parts that require good form-ability, high corrosion resistance, or good solder-ability. Aluminum has good form-ability, corrosion resistance, candle resistance, fatigue strength and medium static intensity, which is used in the manufacture of aircraft fuel tanks, oil pipes, and transportation vehicles, ship sheet metal parts, instruments, street lamp brackets and rivets, hardware products, etc., 3004 aluminum strip is aluminum deep processing products formed by aluminum coil slitting processing, and it is industrially important raw materials.

The surface pretreatment of the 3004 aluminum strip for lamp base is mainly degreasing and derusting, and the method is the same as the pretreatment of the liquid paint. The conductive putty is applied according to the degree of defect of the workpiece, and after drying, it is smoothed with a sandpaper to perform the next process. If some parts of the workpiece are not required to be coated, they can be covered with protective glue before preheating to avoid spraying paint.

In the high-voltage electrostatic field, the powder gun is connected to the negative pole, and the workpiece is grounded to form a loop. The powder is sprayed out by the spray gun with compressed air, which is negatively charged, and is sprayed onto the workpiece according to the principle of opposite-phase attraction. Check the coating of the workpiece, if there are any leaks, bumps, needles and other defects, they should be reworked. Rework or re-injection of the detected workpiece with missing spray, pinhole, bump, or air bubble.

The aluminum strip is corrosion resistant, and the surface of aluminum and its alloys tends to form a dense, strong oxide protective film. This protective film gives aluminum excellent resistance to atmospheric corrosion and water corrosion, and is destroyed only by the intense action of halogen ions and alkali ions. Protective measures can improve the corrosion resistance of aluminum alloys. The 3004 aluminum strip has good electrical conductivity and thermal conductivity, and the electrical conductivity and thermal conductivity of aluminum are second only to silver, copper and gold. If calculated according to the mass conductivity, its conductivity is double that of copper. The aluminum strip is highly reflective, and the polished surface of aluminum has a reflectivity of more than 80% for white light. Aluminum has good reflectivity to infrared rays, ultraviolet rays, electromagnetic waves, and heat radiation.