Metal sculptures, while durable, are prone to several structural failures that can compromise their integrity over time. The most common issues include corrosion, welding defects, material fatigue, and stress fractures.

1. Corrosion: Exposure to moisture and environmental elements leads to rust, weakening the metal. Prevention involves using corrosion-resistant materials like stainless steel or applying protective coatings such as powder coating or galvanization.

2. Welding Defects: Poor welding can cause cracks or weak joints. Skilled craftsmanship and post-weld inspections are critical to ensuring strong, seamless connections.

3. Material Fatigue: Repeated stress from wind or vibrations can cause metal to weaken. Proper anchoring and periodic maintenance help mitigate this risk.

4. Stress Fractures: Thin or improperly supported sections may crack under pressure. Reinforcing high-stress areas during design prevents such failures.

By selecting high-quality materials, employing expert fabrication techniques, and conducting regular upkeep, artists and conservators can significantly extend the lifespan of metal sculptures.