How does a curtain wall system perform in coastal or corrosive environments over long-term use?

In coastal and corrosive environments, a metal curtain wall system’s longevity depends on material selection, protective finishes, and a proactive maintenance program. Salt-laden air accelerates corrosion particularly at joint crevices and fastener interfaces; therefore, specifying corrosion-resistant alloys—marine-grade stainless steel for anchors and properly alloyed aluminum extrusions—reduces long-term risk. Surface pretreatment and high-performance PVDF coatings with thicker film builds enhance resistance to UV and salt attack; anodizing may also be suitable depending on aesthetic and maintenance requirements. Design details that avoid water-trapping crevices, promote drainage, and allow airflow reduce salt deposition and corrosion initiation. Fasteners should be stainless steel with compatible alloys to prevent galvanic corrosion. Regular wash-down schedules to remove salt, sand and airborne pollutants are recommended; inaccessible drain channels and cavities should be inspected and cleaned periodically. For projects in Gulf ports or coastal Caspian environments, specifying sacrificial sacrificial anodes is uncommon for facades but enhanced material selection and finish systems are standard practice. With appropriate detailing, coatings, and maintenance, metal curtain wall systems can provide decades of reliable service even in highly corrosive settings.