That's a great question! Rusty hinges on an outdoor bin are a common headache, making the lid hard to open and eventually leading to breakage. The good news is, preventing rust is straightforward with a little regular maintenance. Here’s a natural, step-by-step approach I use and recommend.
First, start with a good cleaning. If there's already some surface rust, use a stiff brush (a wire brush works well) to scrub it off. For stubborn spots, a paste of baking soda and water can help. Rinse everything thoroughly with water and let the hinges dry completely. This is the most important step—applying any product to a damp surface traps moisture and can make things worse.
Next, apply a lubricant and protectant. A product like WD-40 or a dedicated silicone spray is perfect for this. Spray a generous amount directly onto the hinge pins and all moving parts. Work the lid open and closed a few times to work the lubricant deep into the joints. This not only makes the action smooth but also displaces any leftover moisture and creates a protective barrier.
For long-term protection, consider a more durable coating. After cleaning and drying, you can apply a thin layer of petroleum jelly or a specialized rust-inhibitor spray like CRC or Fluid Film. These coatings are thicker and will withstand the elements longer. If you're feeling thorough, you can even remove the hinges, clean them, and give them a fresh coat of rust-resistant spray paint before reinstalling.
Finally, make this a habit. A quick spray with a lubricant every 3-4 months, especially before rainy or snowy seasons, will keep those hinges operating smoothly for years. Also, if possible, try to move your bin to a slightly covered area during heavy weather. A little preventative care saves you the hassle of dealing with a seized-up or broken lid down the road.