Which type of failure describes a separation between SFRM and substrate?

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Multiple Choice

Which type of failure describes a separation between SFRM and substrate?

Adhesive failure occurs at the bond between two different materials, such as sprayed fire-resistive material and the substrate. When the SFRM separates from the surface, the crack or debond happens right at that interface, indicating the adhesive bond failed rather than the coating material itself. This is different from cohesive failure, which would crack within the SFRM itself while still remaining attached to the substrate, and from delamination, which refers to separation between layers within a layered system. The situation described—coating peeling away from the substrate—points to a bond-at-the-interface failure, i.e., adhesive failure.

Adhesive failure occurs at the bond between two different materials, such as sprayed fire-resistive material and the substrate. When the SFRM separates from the surface, the crack or debond happens right at that interface, indicating the adhesive bond failed rather than the coating material itself. This is different from cohesive failure, which would crack within the SFRM itself while still remaining attached to the substrate, and from delamination, which refers to separation between layers within a layered system. The situation described—coating peeling away from the substrate—points to a bond-at-the-interface failure, i.e., adhesive failure.

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