Metal sculptures in urban or industrial environments face constant exposure to pollutants like acid rain, smog, and chemical residues, which can cause corrosion and discoloration. To combat this, artists employ several strategies to ensure their creations remain durable and visually striking.

1. Material Selection: Artists often choose corrosion-resistant metals like stainless steel, bronze, or corten steel, which naturally develop a protective patina.

2. Protective Coatings: Applying specialized coatings such as wax, lacquer, or powder coatings creates a barrier against pollutants. Clear acrylic sprays are also popular for their UV and moisture resistance.

3. Galvanization: Some sculptures are galvanized with zinc to prevent rust, especially in humid or coastal areas.

4. Regular Maintenance: Routine cleaning with pH-neutral solutions and inspections help remove pollutant buildup before it causes damage.

5. Design Adaptations: Artists may incorporate drainage features or elevated bases to minimize contact with ground-level pollutants.

By combining these methods, artists ensure their metal sculptures withstand harsh environments while maintaining their artistic integrity for decades.