How do artists prevent galvanic corrosion when combining aluminum with other metals in figurative sculptures?

Artists often combine aluminum with other metals to create stunning figurative sculptures, but this can lead to galvanic corrosion—a chemical reaction that deteriorates metals when they come into contact in the presence of an electrolyte (like moisture). To prevent this, artists use several techniques:

1. Insulating Materials: Non-conductive barriers like rubber, plastic, or specialized coatings are placed between dissimilar metals to prevent direct contact.

2. Protective Coatings: Applying paints, powder coatings, or anodizing aluminum creates a protective layer that resists moisture and oxidation.

3. Sacrificial Anodes: Metals like zinc or magnesium are attached to the sculpture, corroding preferentially and protecting the aluminum.

4. Careful Metal Selection: Pairing metals with similar electrochemical potentials (e.g., aluminum with stainless steel) reduces corrosion risk.

5. Environmental Control: Keeping sculptures indoors or in dry conditions minimizes exposure to moisture, a key catalyst for galvanic corrosion.

By employing these methods, artists ensure their metal sculptures remain durable and visually striking for years.