Stress corrosion cracking (SCC) in bronze sculptures is a significant concern for artists, collectors, and conservators. This phenomenon occurs when a combination of tensile stress and corrosive environments leads to the formation of cracks in the metal. The most common causes include exposure to chlorides, sulfides, or ammonia in the atmosphere, which accelerate chemical reactions on the bronze surface. High humidity or coastal environments exacerbate these effects, as saltwater mist introduces chloride ions that penetrate the metal's protective patina.

Another key factor is residual stress from the casting process or mechanical deformation during sculpting. Poor alloy composition, such as excessive zinc or lead content, can also make bronze more susceptible to SCC. Additionally, improper maintenance—like using harsh cleaning agents—can strip the protective oxide layer, leaving the metal vulnerable.

To mitigate these risks, regular inspections, controlled storage conditions, and gentle cleaning methods are essential. Understanding these causes helps preserve bronze sculptures for future generations.