The Airbus A350 is one of the most dynamic aircraft ever built, and it was designed to resist corrosion far better than earlier aluminum airframes because the corrosion-prone metal is replaced and protected. Over 70% of the aircraft’s structure uses advanced materials, more than 50% carbon-fiber composites plus titanium and modern aluminum-lithium compounds. This allows large surface areas to not undergo electrochemical rusting, with fewer fasteners and joints in classic corrosion hotspots. Where metals are present, Airbus selects alloys with resistance capabilities and applies barrier systems that isolate dissimilar metals to prevent galvanic couples. These systems are designed for drainage and sealing.