![]() In conclusion, remember that these protective coats help to decrease corrosion rate, thus prolonging the drywall screws life over regular screws.Īnd it’s best to stick to using drywall screws for drywall installations. They’re chemical treatments that help metal screws withstand corrosion and rust using a thin film of iron, zinc, and other products. It is also the same with phosphate coatings. Hence, when your drywall screws are exposed to anything that induces rusting, it is less likely they’ll suffer from corrosion. In the case of zinc coating, it works as an electropositive metal (sacrificial anode).Īnd this means it places itself before the main screw such that during corrosion, the plating first corrodes before the metal. Zinc and black phosphate coating on drywall screws are an excellent way to prevent rust, but under the right circumstances, they also rust.īut the good news is that this will take some time. It is more visually appealing for use on drywalls that don’t require paint over it. It isn’t the best option for use on surfaces requiring paint. It provides an excellent grip feature making it easy to screw into drywalls. ![]() Zinc coating in drywall screws is an inexpensive plating method that offers the best results. Phosphate-coated drywall screws are more affordable than those with zinc coating. Zinc coating offers a bright finish in screws and is easy to apply. Phosphate offers an impressive corrosion & rust resistance than other screw types except for zinc. Zinc coating on drywall screws protects them from moisture, a widespread cause of rust. Phosphate coating in drywall screws is an excellent paint base. Zinc has corrosive properties serving as a barrier from the screws’ rust rate. However, if you’re planning on a new drywall installation, you’ll want to know which drywall screw offers the best protection from rust.Īnd below, we’ve outlined some notable differences between zinc drywall and phosphate in a tabular form. The zinc coating and black phosphate finish in these drywall screws protect them from corrosion and rust.Īnd this helps to keep your drywall looking beautiful for a long time with no stains. Some drywall screws are rust-resistant but don’t prevent rusting altogether, as some factors are beyond control.įor example, zinc-coated drywall screws and black phosphate drywall screws are both rust-resistant and do an excellent job of preventing corrosion.īut they have a limit, so often you can expect to notice some discoloration around the drywall screw head due to rust.
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