Metal sculptures exposed to outdoor or industrial environments face significant threats from chemical pollutants, acid rain, and industrial emissions. To ensure longevity, artists employ specialized techniques and materials. One common method is using corrosion-resistant metals like stainless steel, bronze, or aluminum, which naturally withstand harsh conditions. Additionally, protective coatings such as powder coating, epoxy resins, or wax seals act as barriers against pollutants.

Regular maintenance, including cleaning with pH-neutral solutions, prevents buildup of harmful substances. Some artists also apply anti-corrosion treatments like galvanization or anodizing for extra protection. Strategic placement—away from high-pollution zones—further minimizes damage. By combining durable materials, protective finishes, and proactive care, artists ensure their metal sculptures remain resilient against environmental degradation for years to come.