(Journal of Aeronautical Materials, 2024-05-01) Khanyi, Nhlanhla F.; Tabakov, Pavel Yaroslavovich; Inambao, Freddie L.
Aqueous Film Forming Foam (AFFF) has become a critical component within the aviation
industry. However, relatively few reports address the causes of the poor performance of AFFF
during fire conditions due to the rarity of air crashes. Herein, the impact of mild steel, stainless
steel, and high-density polyethylene on the foaming ability and foam stability of AFFF was
experimentally investigated. The functional groups, particle shape, size, size distribution, and
elementary analysis were conducted using the Fourier transform infrared spectroscopy,
transmission electron microscopy, dynamic light scattering, and inductively coupled plasma
atomic emission spectroscopy. The results showed that all three materials affect the foam ability
and foam stability of AFFF in some manner, with mild steel having the most severe impact. The
recommendations to use cross-linked polyethylene and fiberglass materials for better storing AFFF
concentrate were thoroughly discussed.
