The smoke production behaviour of epoxy film former and the synergistic smoke suppression effect of epoxy cross-linked structure and ferrocene (FC) on epoxy-based intumescent flame-retardant (IFR-EP) coating have been investigated. The results show that the cross-linked structure of epoxy/polyamide resin can not only effectively enhance thermal stability and suppress smoke in the early combustion stage, but also reduce the production of toxic and flammable gases and promote the production of non-flammable gases. On the other hand, the FC can suppress smoke by radical reactions in the early combustion stage and promote the production of denser residue char. Moreover, the FC can also effectively reduce the total smoke rate in the whole combustion process.
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