The durability of a metal sculpture in outdoor environments is heavily influenced by the type of metal used. Different metals react uniquely to weather conditions, affecting their longevity and appearance over time.

Stainless steel is a popular choice due to its resistance to rust and corrosion, making it ideal for humid or coastal areas. However, it can be expensive and may require occasional polishing to maintain its shine.

Bronze is another durable option, developing a protective patina over time that shields it from further corrosion. This natural aging process adds character, making bronze sculptures a favorite for outdoor art installations.

Corten steel, often used in modern sculptures, forms a rust-like layer that prevents deeper corrosion. While it may appear weathered, its structural integrity remains intact for decades with minimal maintenance.

On the other hand, iron and regular steel are prone to rust unless treated with protective coatings. Regular maintenance, such as sealing or painting, is necessary to prevent deterioration in harsh climates.

Ultimately, the best metal for an outdoor sculpture depends on the desired aesthetic, budget, and willingness to perform upkeep. Choosing the right material ensures the artwork withstands the elements while retaining its beauty for years to come.