The water pump impeller made of cast iron has strong toughness, wear resistance and good corrosion resistance, and the cost is low, which is an ideal water pump impeller material.
The cast iron water pump impeller has the following advantages:
1. Toughness: The cast iron impeller of water pump has high strength and toughness, is not easy to break or deform, and can maintain stability under the impact of violent water flow.
2. Wear resistance: The cast iron impeller of water pump has good wear resistance due to its high material hardness, and can withstand the friction between the blades and the water flow during high-speed rotation.
3. Good corrosion resistance: There is a dense layer of iron oxide on the surface of cast iron material, which can prevent the material from corrosion to a certain extent.
4. Low cost: The molding process of cast iron material is mature, the manufacturing cost is low, and it is suitable for the manufacture of small and medium-sized water pumps.
Some disadvantages of cast iron water pump impellers:
1. Compared with water pump impellers made of other materials, cast iron has poor thermal conductivity.
2. Cast iron is more prone to fatigue fracture than other high-strength materials.
3. Cast iron is a brittle material that is prone to microcracks and fractures when subjected to hot and cold cycles and impacts. 
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