Aged bronze sculptures often develop surface flaking due to a combination of environmental, chemical, and mechanical factors. One primary cause is corrosion, where exposure to moisture, salt, or pollutants accelerates oxidation, weakening the metal's surface. Over time, this leads to flaking or peeling of the patina—the protective outer layer.

Another key factor is thermal stress. Repeated expansion and contraction from temperature fluctuations can crack the patina, causing fragments to detach. Similarly, physical abrasion from handling, cleaning, or environmental debris can wear down the sculpture’s surface.

Poor maintenance practices, such as using harsh chemicals or abrasive tools, also contribute to flaking. Additionally, inadequate initial casting or patination may result in weak adhesion between layers, making the sculpture prone to deterioration.

To mitigate flaking, experts recommend regular inspections, controlled environments, and gentle cleaning methods. Proper conservation ensures these timeless artworks endure for future generations.