GB/T 21872-2008
ActiveSulphonic acid hardener for foundry no-bake furan resin
铸造自硬呋喃树脂用磺酸固化剂
Application Summary AI generated
GB/T 21872-2008 specifies the technical requirements, test methods, inspection rules, and packaging for sulphonic acid hardeners used in foundry no-bake furan resin systems. It is applied in the metal casting industry, specifically for sand mold and core production where furan resin binders are cured at room temperature using these acidic hardeners. The standard ensures consistent curing performance and quality control for foundries producing ferrous and non-ferrous castings.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.