The essence of rust is a chemical reaction between metal and oxygen in the air, such as iron and oxygen reactions to produce rust such as iron oxide or iron trioxide. The rust and iron are loose, so oxygen can come into direct contact with the iron and react with it to produce more rust. And aluminum alloy doors and windows are different, aluminum elements and oxygen chemical reaction to produce alumina, alumina will be tightly attached to the surface of the aluminum frame, become a protective film, aluminum elements and air isolation, to prevent aluminum alloy doors and windows continue to rust, so usually the situation aluminum alloy will not continue to rust.
1. In general, the surface of aluminum alloy doors and windows is oxidized, directly to form a protective film to prevent aluminum alloy internal oxidation. Therefore, when handling and installation should pay attention to protection, to avoid in the transport and installation, due to collision, stampede caused by the oxidation of the protective film damage. Now a lot of luxury house decoration will generally use the door and window in the aluminum alloy doors and windows in the transport process using four layers of packaging, not only to prevent the damage of glass, but also to prevent the aluminum alloy surface oxide film in the process of transport damage.
2. Aluminum alloy doors and windows in the long-term seepage, damp parts may produce abnormal corrosion phenomenon. Therefore, aluminum alloy doors and windows in the construction process need to do a good job of waterproofing, moisture-proof measures. Generally for aluminum alloy door and window border and wall hole gap should use sound insulation moisture, non-corrosive materials, such as the use of polyurethane PH foam filling material to prevent treatment. At the same time, aluminum alloy doors and windows themselves should have a good performance of the drainage tank, to prevent internal water accumulation. Such as the door and window in the design of drainage tank, the use of internal and external position of the wrong method of processing, to prevent cold wind, dust into, even when the wind pressure is very large, can effectively discharge water, to prevent water accumulation.
3. If aluminum alloy doors and windows have been rusty, do not worry. Use fiber brush with clean water to brush the rust, pay attention not to use steel sand, sandpaper, wire balls and other meridian grinding. When the surface rust of the aluminum doors and windows is removed, the exposed aluminum element reacts with the oxygen in the air to produce a new protective film. The use of sandpaper, wire balls, etc. will destroy the original alumina protective film, resulting in a new oxidation reaction of aluminum alloy. Will make the aluminum alloy door and window frame more and more thin, and ultimately affect the life of aluminum alloy doors and windows.