The speed at which urban outdoor furniture rusts near the ocean depends primarily on the material and its protective finish. In the harsh, salty marine environment, standard untreated steel can show signs of surface rust within weeks, with significant corrosion occurring in a single season. The constant salt spray accelerates the oxidation process dramatically compared to inland areas.
To combat this, material selection is critical. Aluminum, especially with a powder-coated finish, offers excellent resistance, often lasting years without issue. Stainless steel (Grade 304 or, better, 316 marine-grade) is highly resilient. Conversely, wrought or cast iron, even with paint, requires vigilant maintenance. Protective powder coatings, galvanization, and regular cleaning with fresh water to remove salt residue are essential to slow corrosion. Ultimately, investing in inherently rust-resistant materials designed for coastal use is the most effective strategy for long-lasting furniture by the sea.