Patterned aluminum coil is a relatively common building material, and its technological process is mainly divided into three parts: deesterification, sand mill and water washing. Among them, water washing is a very important process. In order to ensure the surface quality and welding quality of the aluminum coil, strict cleaning measures should be taken to completely remove the grease and oxide film on the surface of the aluminum coil and the welded joints. So how does the aluminum coil manufacturer clean the brushed aluminum coil?
1. Mechanical cleaning: Mechanical cleaning is often used when the workpiece is large in size, has a long production cycle, and is contaminated after multiple layers or chemical cleaning. First wipe the surface with acetone, gasoline and other organic solvents to remove oil, then directly brush with a copper wire brush or stainless steel wire brush with a diameter of 0.15mm~0.2mm until the metallic luster is exposed. Generally, it is not advisable to use a grinding wheel or ordinary sandpaper for grinding, so as to avoid the sand particles remaining on the metal surface and entering the molten pool during the drawing process to produce slag inclusions and other defects.
In addition, scrapers, files, etc. can also be used to clean the surface to be welded. After the workpiece and process are cleaned and cleaned, the oxide film will regenerate during the storage process, especially in a humid environment, in an environment polluted by acid, alkali and other vapors, the oxide film grows faster. Therefore, the storage time of workpiece and wire drawing after cleaning and cleaning and before wire drawing should be shortened as much as possible. In the case of humid climate, wire drawing should generally be done within 4 hours after cleaning. After cleaning, if the storage time is too long (more than 24h), it should be reprocessed.
2. Chemical cleaning: The chemical cleaning efficiency is high and the quality is stable. The wire drawing process is suitable for cleaning workpieces with small size and batch production. There are two types of dipping method and scrubbing method. Use acetone, gasoline, kerosene and other organic solvents to remove oil from the surface, wash with 5%~10% NaOH solution at 40℃~70℃ for 3min~7min (for pure aluminum, the time is slightly longer but not more than 20min), rinse with running water, and then use Pickling with 30% HNO3 solution at room temperature to 60℃ for 1min~3min, rinse with running water, air dry or dry at low temperature.
The above is the cleaning method of the brushed aluminum coil introduced by Sanmen United. The cleaning steps of the brushed aluminum coil are the basis. If the brushing process is done well, the quality of the finished product can be better.
Sanmen United Building Materials Co., Ltd. (aluminum coil manufacturer) is a modern enterprise specializing in deep processing of aluminum surfaces. The products cover a variety of surface effects and are favored by the majority of users. The company has now formed a production and sales of color-coated aluminum, mirror aluminum, brushed aluminum, wood-grained aluminum, stone-grained aluminum, embossed aluminum, etc., with quality control, product development, and after-sales service.
The company will adhere to continuous innovation, integrity-based, quality first, and won the recognition and trust of customers. The company's products are exported to dozens of countries and regions such as India, Vietnam, Russia, South Korea, the Middle East, and Southeast Asia. We look forward to working with our trading partners. Establish a solid, mutually beneficial and win-win strategic partnership. Contact: 0086-576-83381188