First of all, "Tiny Cooling Fan" of different materials in the drag coefficient above, also has a great difference. If the vehicle is in motion the process of the emergence of the heating system imbalance, as well as the potential difference between the potential of the situation, are likely to lead to a cooling fan suffered electrochemical corrosion, and can not normally be used. In addition, "Tiny Cooling Fan" of different materials, in terms of corrosion resistance, there are also great differences. Take waterway copper radiator fan, and a steel column radiator fan to examples given it. System column "Tiny Cooling Fan" in the middle of the actual application, the air flow is generally low, people will appear dry and hot conditions. However, copper waterway radiator fan can be good to avoid this problem. However, the actual energy consumption during waterway copper radiator fan, than, those steel column radiator fan is higher than many.