Placing benches near the ocean requires careful material selection to combat the relentless, corrosive effects of salt spray. The most resistant materials will ensure longevity, safety, and minimal maintenance. For superior performance, prioritize these options:
Marine-Grade Aluminum (5000 or 6000 series): This is a top contender. It naturally forms a protective oxide layer, is exceptionally lightweight, and is highly resistant to saltwater corrosion. Ensure it has a powder-coated finish for an extra layer of protection and color retention.
Type 316 Stainless Steel: Often called "marine-grade stainless," it contains molybdenum, which drastically increases its resistance to chloride corrosion compared to standard 304 stainless. It is strong, durable, and maintains its appearance with occasional washing.
High-Quality Plastic Polymers (HDPE) or Recycled Plastic: These are completely impervious to salt corrosion. Made from dense polyethylene, they are low-maintenance, eco-friendly, and ideal for heavy-use areas, though they may lack the aesthetic weight of metal.
Treated Hardwoods (Like Ipe or Teak): These dense tropical hardwoods have natural oils that resist moisture, rot, and insect damage. When used with stainless steel or silicon bronze fasteners, they can perform well, but require periodic sealing to maintain their integrity.
Materials to Avoid: Avoid standard carbon steel, wrought iron, and low-grade aluminum. Even with coatings, salt spray will eventually penetrate, leading to rapid rust and deterioration.
For the longest-lasting solution near the ocean, invest in marine-grade aluminum or 316 stainless steel. Pair your material choice with appropriate, corrosion-resistant hardware for a bench that will withstand the harsh coastal environment for years to come.