At present, there are many types of corrosion-resistant centrifugal fans used for industrial waste gas transportation and emission in China, generally made of hard polyvinyl chloride, polyester fiberglass, stainless steel, etc. These fans have insurmountable weaknesses in performance. Due to the poor strength of the impeller, hard polyvinyl chloride fans can only be used in low-pressure situations and are prone to aging, with a short service life; However, due to limitations in processing technology, it is difficult for polyester fiberglass fans to meet the requirements for impeller strength and aerodynamic performance; Stainless steel fans are difficult for users due to their high cost, large investment, and limited corrosion resistance. To overcome the weaknesses of the above fans and provide a high-performance, corrosion-resistant, and high-strength fan for the transportation and emission of corrosive gases, our company has jointly developed a new type of GBF4-72 series centrifugal fan with the support of relevant design units. The impeller of this type of fan is made of high-quality carbon steel as the skeleton and compounded with polyester fiberglass processed by specific processes. It not only has the corrosion resistance of a full fiberglass fan, but also retains the structural strength of a steel fan. Its aerodynamic performance meets the 4-72 fan performance requirements, with a flat curve, wide range of use, and low noise. It has been proven to be an ideal corrosion-resistant fan in China.