Dezincification, a form of corrosion where zinc leaches out of bronze alloys, poses a significant threat to sculptures with high copper content. To preserve these artworks, several proven methods can be employed.

1. Material Selection: Opt for bronze alloys with lower zinc content (below 15%) to reduce dezincification risks. Silicon bronze or aluminum bronze are excellent alternatives.

2. Protective Coatings: Apply microcrystalline wax or specialized lacquers like Incralac to create a barrier against moisture and pollutants. Regular reapplication is essential for long-term protection.

3. Environmental Control: Maintain stable humidity levels (below 55%) and avoid exposure to chlorides or acidic pollutants. Indoor display with climate control is ideal.

4. Cathodic Protection: For outdoor sculptures, consider sacrificial anodes made of more reactive metals to divert corrosion away from the bronze.

5. Regular Maintenance: Implement a cleaning regimen using pH-neutral solutions and inspect for early signs of corrosion.

By combining these strategies, conservators can significantly extend the lifespan of high-copper bronze artworks while preserving their aesthetic and structural integrity.