Intergranular corrosion in bronze sculptures is a persistent challenge for conservators and artists alike. This form of corrosion occurs along grain boundaries, weakening the metal's structural integrity and compromising its aesthetic appeal. To combat this issue, several proven methods can be employed.

1. Material Selection: Opt for bronze alloys with low susceptibility to intergranular corrosion, such as those with controlled tin content (below 8%) and added phosphorus or aluminum to stabilize the microstructure.

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

3. Environmental Control: Maintain stable humidity levels (ideally below 40% RH) and minimize exposure to chlorides, sulfur compounds, and acidic pollutants through proper display cases or indoor storage.

4. Electrochemical Treatments: Consider cathodic protection systems for outdoor sculptures, using sacrificial anodes or impressed current to counteract corrosive processes.

5. Regular Maintenance: Implement a routine inspection and cleaning schedule using pH-neutral solutions to remove corrosive deposits before they penetrate the metal surface.

By combining these approaches, conservators can significantly extend the lifespan of bronze artworks while preserving their historical and artistic value. Each sculpture may require a tailored solution based on its composition, age, and environmental exposure.