What are the effects of ozone exposure on painted aluminum outdoor sculptures?

Ozone exposure can significantly impact painted aluminum outdoor sculptures, leading to both aesthetic and structural damage. Over time, ozone reacts with the paint's chemical composition, causing fading, chalking, or peeling. This not only diminishes the artwork's visual appeal but also exposes the aluminum beneath to further environmental harm.

Aluminum itself is resistant to corrosion, but when the protective paint layer deteriorates, the metal may oxidize, especially in humid or polluted environments. Ozone accelerates this process by breaking down the paint's binders and pigments. Additionally, repeated ozone exposure can weaken the sculpture's surface, making it more susceptible to scratches and other physical damage.

To mitigate these effects, artists and conservators often use high-quality, UV-resistant paints and clear coatings designed to withstand ozone and other environmental stressors. Regular maintenance, including cleaning and touch-ups, can also prolong the sculpture's lifespan. Understanding these risks helps in preserving public art for future generations.