Effects of Dolomite on Thermal Performance of Intumescent Fire Retardant Coating for Structural Steel

Intumescent fire retardant (IFR) coating is designed to protect the substrate against fire. In case of fire, intumescent coating expends and form a thick porous char layer act as thermal barriers which is strong enough to protect the substrate from fire and retain its structural integrity. IFR coating consist of 3 main ingredients; an acid source (ammonium polyphosphate-APP), carbon source (expendable graphite-EG) and a blowing agent (melamine-MEL). The main objective of this project is to develop an IFR coating with reinforced of Dolomite filler and study the thermal performance, residual weight, char morphology and gaseous product of IFR coating for protection of steel substrate. The coating was formulated using the basic formula (APP-MEL-EG) with addition of Dolomite