What aluminum coatings resist damage from jet fuel exposure?

When selecting aluminum coatings for components exposed to jet fuel, several protective options demonstrate exceptional resistance to degradation. Anodized aluminum coatings create a hard, non-conductive oxide layer that effectively resists jet fuel penetration and subsequent damage. This electrochemical process yields a surface highly impervious to JP-5, JP-8, and other common aviation fuels. Epoxy-based coatings provide another reliable solution, forming a chemically resistant barrier that prevents fuel absorption and subsequent aluminum corrosion. These polymer coatings maintain their structural integrity even during prolonged fuel immersion. Polyurethane topcoats offer additional protection with excellent flexibility and resistance to fuel-related swelling or softening. For maximum protection in critical aerospace applications, many manufacturers combine conversion coatings with specialized sealants, creating multi-layer defense systems. Chemical conversion coatings like alodine provide a good foundation layer that enhances paint adhesion while offering basic fuel resistance. The most effective protection typically comes from properly applied multi-coat systems specifically engineered for fuel exposure, combining primer and topcoat technologies. Regular inspection and maintenance remain crucial since even the most robust coatings can eventually degrade when constantly exposed to jet fuel's chemical composition and operational temperature fluctuations.