Dec 15, 2020
How to clean cast aluminum heater?
What are the cleaning requirements for cast aluminum heaters? Jaye Heater will introduce for you:
During the kneading and cutting of the tube shell, end cap, tube core and liquid-filled tube, these parts of the cast aluminum heater are inevitably contaminated by dirt. For example, when kneading the inner groove tube, the lubricant will stay in the tube, and when other parts are processed, it will also be contaminated by oil and other dirt. If dirt is brought into the cast aluminum heater, not only the moisture function of the working medium will be deteriorated, but also the working medium itself will be contaminated and the transmission function will also be reduced.
Cast aluminum heater processing often leaves some metal chips in the shell, and long-term pipes will accumulate a lot of dust. If left untreated, the capillary channel will be blocked. The residual water in the aluminum or stainless steel tube shell will react with the tube wall to generate non-condensable gas, which will not only corrode the tube shell, but also block the condensation section and make the heat pipe unable to work normally. In addition, the welding of parts needs to be cleaned. The quality of welding is closely related to the surface cleanliness of the parts.
The cleaning process usually includes oil removal, oxide removal, refining and drying. Solvents (alcohol, carbon tetrachloride, etc.) can be used for degreasing or chemical degreasing (such as sodium hydroxide solution). The removal of the oxide film depends on the data. For aluminum and aluminum alloys, alkaline solutions can be used. For copper, copper alloys and stainless steel, acid corrosion can be used. Then wash with clean water, dry and store. Here, the manufacturers of cast copper heaters provide cleaning processes for aluminum and aluminum alloys, copper and copper alloys, and stainless steel. Of course, other suitable methods can also be used. It should be pointed out that whether it is pickling or alkaline cleaning, it should not be too long at any time to prevent excessive corrosion, especially for axial grooves and spiral grooves. Excessive corrosion will enlarge the groove and reduce the capillary force.
Copper mesh is often used, and the wire diameter is small, so acid cleaning is not suitable. The oil can be removed after immersing it in the solvent. The inside of the sintered die is very clean, so there is no need to clean it. If you need to clean it, you can soak it in a solvent, and then bake it for a long time to completely evaporate the residual solvent in the die. In addition, lye and acid are different in corrosiveness, and harmful gases will be emitted during the cleaning process. For example, when copper interacts with acid, a gradient gas is released. When longitudinal gas escapes through the acid solution, an acid mist will be formed. Therefore, it should be cleaned in a well-ventilated environment.
