Metal sculptures, while durable, often face structural weaknesses due to environmental factors, material fatigue, or design flaws. The most common issues include:

1. Stress Cracks: Thin or uneven metal sections develop fractures from repeated stress. Mitigation involves reinforcing weak points with additional welding or internal supports.

2. Corrosion: Exposure to moisture causes rust, especially in outdoor sculptures. Regular sealing with anti-corrosive coatings (e.g., wax or polyurethane) and stainless-steel alloys prevent deterioration.

3. Joint Failures: Weak weld points or soldered joints may loosen over time. Re-welding using high-temperature techniques and periodic inspections ensure stability.

4. Thermal Expansion: Temperature changes cause metal to warp. Designers incorporate expansion gaps or flexible materials (e.g., bronze) to accommodate movement.

5. Base Instability: Poor anchoring leads to tilting or collapse. Solutions include weighted foundations, deep concrete footings, or seismic-resistant mounts.

Proactive maintenance—cleaning, touch-up coatings, and structural assessments—extends a sculpture’s lifespan. For valuable pieces, consult professional conservators to address complex damage.