09-28-2022, 07:30 AM
Aluminum may not be best for constant submersion, but it is popular for boats, docks, pontoons, site furniture and ladders because it is both light and strong. When raw aluminum is exposed to air and water (rather than constantly submerged) the aluminum oxide that develops on the surface can provide protection against further corrosion. The grade is important though: common 3000-series grades of aluminum can oxidize quickly in a marine environment. If you’re sourcing an aluminum item to go in or around water, make sure you’re getting something considered marine grade, either 5000 series or some of the 6000 series builder’s aluminum. With care and maintenance, these grades give long use life for aluminum objects near the water.