That's a great question! Dealing with a wet, rusty bin base is a common headache in cities. Here’s what I’ve found works well, from simple fixes to more involved solutions.
First, the goal is to stop water from pooling. If your bin sits flat on concrete or asphalt, it traps moisture. The easiest fix is to elevate it slightly. You can place it on a simple platform made of pressure-treated wood or plastic bricks. This creates an air gap for evaporation. For permanent public bins, a concrete pad poured with a slight slope is the gold standard.
Drill drainage holes if your bin doesn't have them. A few small holes (about 1/4 inch) in the lowest part of the sides—not the very bottom—let water escape without compromising strength. Just be sure to smooth any sharp edges.
Material choice is key. If you're replacing a bin, opt for galvanized steel, heavy-duty plastic, or stainless steel. For existing metal bins, a thorough rust treatment followed by a protective coating is vital. Scrub off loose rust, apply a rust converter, and finish with a tough, waterproof paint or rubberized sealant designed for metal.
Regular maintenance is your best defense. Make it a habit to check and clear the base of leaves, dirt, and debris every time you empty the bin. This prevents clogs that hold moisture. During winter, clear away snow and ice promptly.
Finally, consider a custom-fit rubber or plastic mat for inside the bottom. It creates a barrier between wet trash and the metal surface.
It really comes down to keeping the area dry and creating a physical barrier between the metal and moisture. A little proactive care saves a lot of hassle and expense from replacement down the line!