1.The relative humidity of the atmosphere
The amount of water vapor in the atmosphere as a percentage of saturated water vapor at the same temperature is called relative humidity. At a certain relative humidity, the corrosion rate of hardware door and window corner code is very small, but above the relative humidity, the corrosion rate increases sharply.
2.Temperature and humidity
The correlation between atmospheric temperature and humidity affects hardware corner corrosion. There are mainly the following situations: first, the atmospheric water vapor content increases with the increase of temperature; Second, high temperatures aggravate corrosion, especially in humid environments. The higher the temperature, the faster the corrosion rate.
3. Corrosive gas
Among the corrosive gases that pollute the air, sulfur dioxide has a great effect on the corrosion of metal Angle, especially on steel, copper and their alloys. Sulfur dioxide in the atmosphere comes mainly from the burning of coal. Carbon dioxide, the product of combustion, is also corrosive.
4. Other factors
The atmosphere contains a lot of dust, such as soot, coal ash, acid, base and salt particles such as chloride.