Alumnimum window and door hardware accessories have the best resistant to corrosion, but because of air and environment’s influence, it is also doing a harm to the aluminum window and door hardware acessories’corrodion. And the air and environment’s influences are air humidness, environment humidness and air pollution.
  1, Air humidness
  Aluminum window and door hardware accessories always in the humidity air and the air will become the drop and erosion the hardware accessories.  So the air humidness is the mainly reason, when air humidness arrives to a point that it will become a drop, so the erosion can’t avoid.
  So we must keep the window and door in the dry air, especially in the room. When we meet humidness day, we keep ventilate and scrub them usually.
  2, Environment humidness
  In Summer, it is hot and high temperature. With the high temperature, Aluminum window and door hardware accessories’s erosion increases faster. Because the different temperature of day and night, there are more drop, so the erosion is stronger. In usually, when the temperature is over 6 degree from day and night and the temperature in 5 to 50, it will do harm to the accessories in the air humidness in 60% to 80%.

 3,Air pollution
  In these years, the air pollution is becoming more and more seriousness. And there are many Acid and alkali substances adsorbing on the window and door hardware accessories. So it is ecorrised by them. Because of the air pollution, there is more and more acid rain, and it also does a harm to the window and door accessories.
  So we should protect the environment and protect the air to keep our window and door accessories better.