The GB/T 8491-2009 standard specifies a series of key contents for high silicon corrosion resistant cast iron parts. It clarifies the classification and grade of high silicon corrosion resistant cast iron parts, and gives technical requirements in detail, including chemical composition, mechanical properties, corrosion resistance performance and other indicators. At the same time, it also standardizes test methods, inspection rules and signs, Encasement and other matters. This standard provides mass control basis for production enterprises to ensure that high silicon corrosion resistant cast iron parts can perform well in various corrosion environments. It is widely used in chemical industry, metallurgy and other fields to effectively prolong the service life of equipment and ensure the Stability of industrial production.