The impact of mild steel, stainless steel, and high-density polyethylene on the foaming ability and foam stability of aqueous film forming foam in aviation

Abstract

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.