![]() I live in a rainy wet climate, so I use stainless screws on anything outside that I might need to ever take apart again. Galvanized or other coated screws are just plain cheaper.ĭespite those drawbacks, the rust prevention is unmatched by other screws. (2) Stainless steel screws are more expensive. You have to slow down and be a little more careful. ![]() It is easier to chew up the heads on stainless screws, or to snap the heads right off by over-torquing them (though that is more of a problem with bolts than wood screws). You can't just "go crazy" with the power tools and slam the screws into place. (1) Stainless steel is slightly softer than the hard steel used in deck screws or other similar screws. Why, then, would anyone use anything other than stainless steel outdoors? Two reasons: Fasteners that have been zinc plated and clear passivated. Galvanized nails and sheet metal you find at the home improvement store are coated with molten zinc. Stainless steel is undoubtedly the best material for resisting rust and corrosion in screws. Galvanized Pallet Rack and Cantilever offer many benefits for a long life in outdoor use and freezer applications. Zinc plated fasteners will rust if placed in a wet environment and are not suitable for outside use. One way to protect steel and iron from rust is to coat it with a metal that resists rust: zinc. Phillips-head screws in particular are notorious for getting ground up when the tip "cams out" and jumps out of the screw head. I have some screws on an outdoor fence which have rusted inside the slots in the screw head, because the screw driver tip wore away some of the coating in the slots at time of installation. Hot dip galvanisation is a process where cleaned steel is immersed in a bath of molten zinc, creating layers of zinc-iron alloy which provide an extremely. Other screws may be zinc coated as well using another process, or they may be coated with something else. Galvanization is a process that coats with zinc. One of the main reasons why zinc corrosion occurs is because it’s exposed to certain. ![]() However, there are some circumstances in which zinc can corrode. This means that zinc metal won’t rust in most cases, even if it’s left outdoors or exposed to moisture. The other screws are only covered with a rust-resistant coating on their surface, which will break down or wear off over time. Zinc is a metal naturally resistant to corrosion due to its chemical composition. Stainless steel screws are rust-resistant throughout the entire screw, not just on the surface. The stainless steel screw will absolutely be the best screw to resist rust.
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