Bronze sculptures exposed to marine environments with high levels of salt spray undergo unique aging processes due to the corrosive nature of saltwater. The interaction between bronze—a copper alloy—and salt accelerates oxidation, leading to distinct visual and structural changes over time.

Initially, salt spray causes surface tarnishing, forming a reddish-brown copper oxide layer. Prolonged exposure triggers further reactions, resulting in the iconic green-blue patina (primarily copper carbonate and chloride compounds). While this patina can protect the underlying metal, excessive salt accumulation may lead to pitting corrosion, weakening the sculpture's integrity.

Marine environments also promote galvanic corrosion if the bronze contains other metals, exacerbating deterioration. To mitigate damage, artists and conservators apply protective coatings like wax or lacquer, though these require regular maintenance in coastal areas.

Understanding these aging mechanisms helps in preserving outdoor bronze artworks, balancing natural patination with structural longevity. Proper placement, cleaning routines, and corrosion-resistant alloys can extend a sculpture's lifespan even in harsh coastal conditions.