Outdoor metal sculptures face constant exposure to environmental factors like humidity and temperature, which can significantly impact their durability and appearance. High humidity accelerates oxidation, leading to rust and corrosion, especially in iron and steel sculptures. Prolonged moisture exposure weakens structural integrity, causing cracks or warping over time.

Temperature fluctuations also play a critical role. Extreme heat can expand metal, while cold contracts it, creating stress that may result in fractures. Coastal areas, with salty air, exacerbate corrosion, requiring more frequent maintenance.

To protect sculptures, apply weather-resistant coatings like wax or specialized sealants. Regular cleaning to remove dirt and pollutants prevents chemical reactions. Stainless steel or bronze, though costlier, offer better resistance. Seasonal inspections help detect early damage, ensuring timely repairs.

By understanding these environmental challenges, artists and collectors can implement proactive measures to preserve outdoor metal art for generations.