Bronze patinas are prized for their aesthetic and protective qualities, but surface flaking can compromise both. The most common causes of flaking include improper application of patina solutions, environmental exposure, and underlying corrosion.

1. Improper Application: Uneven or overly thick patina layers can lead to poor adhesion, causing flaking. To repair, gently remove loose flakes and reapply the patina in thin, controlled layers.

2. Environmental Factors: Humidity, pollutants, and salt air accelerate corrosion beneath the patina. Cleaning with a mild detergent and applying a protective wax or lacquer can prevent further damage.

3. Subsurface Corrosion: Bronze oxidation weakens the metal’s surface. Professional conservators may use mechanical cleaning or chemical stabilizers to halt corrosion before reapplying the patina.

For severe flaking, consult a metal conservation expert to ensure the artifact’s longevity. Regular maintenance and controlled environments are key to preserving bronze patinas.