Creating metal sculptures that withstand saltwater corrosion requires careful planning and execution. The first step is selecting the right materials. Stainless steel, particularly grades 316 or 2205, offers excellent corrosion resistance due to their high chromium and molybdenum content. Bronze, especially aluminum bronze, is another superb choice for marine environments.

Proper surface treatment significantly enhances durability. Applying multiple layers of marine-grade epoxy primer and polyurethane topcoat creates a robust barrier against saltwater. For added protection, consider galvanization or powder coating, which provide long-lasting shields against corrosive elements.

Design considerations are equally important. Avoid creating crevices or pockets where saltwater can accumulate. Smooth, flowing designs with proper drainage holes help prevent water retention. Regular maintenance, including rinsing with fresh water and periodic reapplication of protective coatings, will extend the sculpture's lifespan in marine settings.

For electrical components in kinetic sculptures, use waterproof enclosures and corrosion-resistant connectors. Sacrificial anodes made of zinc can be incorporated to protect more valuable metals through cathodic protection.

By combining these material selections, protective treatments, and design strategies, artists can create stunning metal sculptures that endure harsh saltwater environments while maintaining their aesthetic appeal for years to come.