Bronze sculptures are prized for their durability and timeless beauty, but over time, they often develop discoloration due to various factors. The most common causes include oxidation, which creates a green or brown patina; exposure to pollutants like sulfur dioxide, leading to black or dark spots; and salt corrosion, especially in coastal areas, which can cause pitting and uneven coloring. Additionally, improper cleaning methods or contact with acidic substances can accelerate tarnishing.

To treat discolored bronze, professionals typically start with gentle cleaning using distilled water and soft brushes to remove surface dirt. For stubborn patina or corrosion, chemical treatments like ammonium carbonate or electrolytic reduction may be used, followed by wax or lacquer coatings to protect the surface. Preventive measures, such as controlling humidity and avoiding direct sunlight, can also help maintain the sculpture’s original appearance. Regular maintenance ensures these artworks remain vibrant for generations.