Metal sculptures are a popular choice for outdoor art, but their performance in high-humidity or coastal environments depends on material selection, protective treatments, and maintenance. Metals like bronze, stainless steel, and corten steel are highly resistant to corrosion, making them ideal for such conditions. Bronze develops a protective patina over time, while stainless steel's chromium content prevents rust. Corten steel forms a stable rust layer that halts further degradation.

To enhance durability, artists often apply protective coatings like wax, lacquer, or specialized sealants. Regular cleaning to remove salt deposits and pollutants is crucial in coastal areas. Proper placement—avoiding direct exposure to salt spray—can also extend a sculpture's lifespan.

For collectors, choosing the right metal and ensuring ongoing care are key to preserving these artworks in challenging climates. With the right approach, metal sculptures can endure and even thrive in humid or salty air, adding timeless beauty to coastal landscapes.