According to the type of profile, modern building doors and windows can be roughly divided into plastic windows, composite windows, and aluminum alloy windows. Among them, aluminum alloy windows are the main building door and window products in China today, and they account for a large proportion in today's buildings. In fact, aluminum alloy windows have advantages in wind pressure resistance, water tightness, air tightness, and environmental protection. This is because compared to plastic windows with the same cross-section, the moment of inertia of aluminum alloy windows is 3-4 times that of plastic windows; By using thermal insulation bridges in aluminum alloy profiles, the thermal insulation and insulation performance of aluminum alloy windows have been greatly improved, which is very suitable for today's strongly advocated energy-saving requirements.
Meteorological factors affecting corrosion of aluminum alloy door and window hardware:
1. Humidity
Door and window accessory manufacturersIntroduction: Due to the condensation of moisture in the air into a liquid water film, which is a necessary condition for the formation of corrosive primary batteries, air humidity is the main factor. When the humidity reaches a critical value, a water film will form on the surface, and the corrosion rate will increase.
2. Temperature
Door and window accessory manufacturersIntroduce how to accelerate corrosion by increasing temperature under high temperature and humidity. When the temperature suddenly changes from high temperature (at night), water vapor in the atmosphere will condense into a film, which will also accelerate the corrosion process. The longer the humidity, the more severe the corrosion. Generally speaking, the temperature difference between day and night is greater than 6 C. The temperature is 5. C-50. When the range of C changes, condensation occurs as long as the relative humidity reaches 65% -75%.
3. Air pollution
Door and window accessory manufacturersUnder normal circumstances, there is almost no corrosive medium in the air, only oxygen can frequently corrode metals. However, with the continuous development of industrial enterprises in various countries, harmful gases and dust in the air have also greatly increased, such as coal, kerosene, and diesel. After combustion, carbon dioxide and other gases are produced. There is also a large amount of dust, such as smoke, coal ash, chlorides, and other acid, alkali, salt particles, which are scattered into the atmosphere. Some corrosive agents themselves corrode, while others corrode into droplets and corrode metals.
Anti corrosion measures for aluminum alloy door and window hardware:
1. Choose appropriate materials
1) Using materials with similar potential differences to aluminum profiles
2) Using zinc alloy with appropriate surface treatment
3) Choose more stainless steel materials
2. Perform corresponding surface treatment
1) Metal plated protective layer
2) Plating non-metallic protective layer
3. Adopting double-layer corrosion protection
4. Adopting new technologies, processes, and materials
