The assessment of fire risk rating of wood specimens coated with metal oxides in different oxidation states in case of fire (I)

Abstract

ABSTRACT The fire risk rating assessment of wood was evaluated using fire performance index-VIII, fire growth index-VIII, and fire risk index-IX from previously described Chung’s equations. The burning properties of the materials was measured using a cone calorimeter (ISO 5660-1). SnO, SnO2, FeO and Fe2O3 were used as the metal oxides, and sodium silicate was mixed to increase the flame-retardant effect. The fire performance index-VIII was 15.5–139.3 times higher than the uncoated specimen. The fire growth index-VIII was 12–71 times lower than the uncoated specimen. The fire risk index-IX of the coated specimens was 239–9861 times lower than the uncoated specimens. SnOSS was the lowest risk material according to the fire risk rating FRI-IX. A lower oxidation state was a safer material for an initial fire than a higher oxidation state. All specimens showed an improved fire risk compared to uncoated specimens.