When comparing bronze and iron sculptures, rust resistance is a critical factor for artists and collectors. Bronze, an alloy primarily composed of copper and tin, naturally develops a protective patina over time. This patina acts as a barrier against corrosion, making bronze sculptures highly resistant to rust. The greenish or brownish layer not only prevents further oxidation but also adds a unique aesthetic appeal, often enhancing the artwork's value.

In contrast, iron sculptures are prone to rust when exposed to moisture and oxygen. Unless treated with protective coatings like paint or sealants, iron will corrode over time, leading to structural weakness and aesthetic degradation. While some artists embrace rust as part of the artwork's character, it requires ongoing maintenance to prevent excessive damage.

Bronze's superior rust resistance makes it ideal for outdoor installations and long-term preservation, whereas iron sculptures demand more care and are better suited for controlled environments. Both metals offer distinct artistic qualities, but bronze stands out for its durability and low-maintenance appeal.