In my previous post I talked about the advantages and disadvantages of having steel as a material for your curbside locking mailbox. As I said before, the chief disadvantage of steel is the fact that it can rust and corrode. Especially if you live in humid environments and by bodies of salt water.
However, even in dry climates, steel can rust very easily. The best thing to keep steel from rusting is to use stainless steel. This is extremely expensive. There are other steel alloys that are less expensive but still have high rust resistance. For example, MailCase uses a zinc-steel alloy on our locking mailboxes. This not only makes the steel stronger, but adds corrosion resistance.
In my next post I’ll talk a little bit about coatings and galvanization, and how that helps increase rust resistance.