Why are copper impellers preferred for conveying oil-based media in chemical pumps?

When transporting oil-based media such as diesel and gasoline, ATACH Pump factory usually recommends using chemical pumps made of copper for customers. 

Why can cast steel, stainless steel, and other materials also be used for transporting oil? 

Why aren't they preferred instead? 

When transporting oil-based media in chemical pumps, copper impellers (such as bronze impellers) are often the preferred choice, mainly due to their material properties and safety requirements. The following provides an analysis from key perspectives. 

Explosion-proof safety is a core factor. This is because oil-based media (such as gasoline and diesel) are highly flammable and explosive. 

Copper, as a non-ferrous metal, is less likely to generate sparks during friction or impact, thereby reducing the risk of ignition. 

For example, in petrochemical environments, explosion-proof requirements are strict. 

Copper material can effectively prevent static sparks from causing accidents. 

Similar regulations are also seen in the design of oxygen stations for the mandatory use of non-ferrous metals. 

The wear resistance and heat dissipation properties of the copper impeller contribute to enhancing the long-term operational stability of the pump. 

Its wear-resistant feature can extend the service life of the impeller, while the excellent heat dissipation capability prevents overheating under high load and maintains the pump's efficiency. 

In terms of material compatibility, copper has good corrosion resistance to most oil-based media, preventing corrosion of the impeller or contamination of the medium due to chemical reactions. 

However, it is important to note that in specific corrosive environments (such as sulfur-containing media), the suitability of copper may need to be evaluated. 

In such cases, stainless steel and other materials may also be considered as alternatives. 

Industry practices and standards further support the application of copper impellers. 

For instance, in the design of marine propellers or chemical pumps, copper is widely used due to its comprehensive properties. 

Although some practices may use cast steel or stainless steel, the need for explosion protection often makes copper the preferred option.