Galvanic corrosion is a common challenge when creating mixed-metal sculptures, as dissimilar metals react electrochemically in the presence of an electrolyte like moisture. To preserve your artwork, follow these best practices:

1. Material Compatibility: Choose metals close to each other on the galvanic series (e.g., stainless steel and bronze) to minimize potential differences. Avoid pairing highly reactive metals like aluminum with noble metals like copper.

2. Insulation Techniques: Use non-conductive barriers such as rubber gaskets, Teflon tape, or specialized coatings to physically separate dissimilar metals and prevent direct contact.

3. Protective Coatings: Apply corrosion-resistant finishes like powder coating, anodizing, or clear sealants to shield metal surfaces from moisture and environmental exposure.

4. Sacrificial Anodes: Incorporate a more reactive metal (e.g., zinc or magnesium) that corrodes preferentially, protecting the primary metals in the sculpture.

5. Environmental Control: Display sculptures indoors or in low-humidity areas. For outdoor installations, ensure proper drainage and avoid prolonged exposure to saltwater or industrial pollutants.

6. Regular Maintenance: Inspect sculptures periodically for signs of corrosion, clean surfaces with pH-neutral solutions, and reapply protective coatings as needed.

By combining these strategies, artists can significantly extend the lifespan of mixed-metal sculptures while maintaining their aesthetic integrity.