How is corrosion prevented in aircraft structures?

Aircraft corrosion prevention uses multiple strategies: Material selection (corrosion-resistant alloys, anodizing aluminum), Protective coatings (primer, paint, sealants), Galvanic isolation (separating dissimilar metals with insulation, sealant, or coatings), Design features (drainage paths, access for inspection, avoiding water traps), and Maintenance programs (regular inspection, cleaning, re-treatment). Particularly critical at fastener holes, lap joints, and dissimilar metal interfaces. Cladding (pure aluminum layer on alloy) and chromate conversion coatings provide additional protection. Corrosion can significantly reduce fatigue life if not controlled.