Do black drywall screws rust?

Key Takeaways

Black drywall screws may rust when exposed to moisture or humidity over time.
To prevent rust, consider using stainless steel or coated screws designed for damp environments.
Proper ventilation and moisture control in the area where the screws are used can also help mitigate rust formation.

Black drywall screws have a phosphate coating that is supposed to keep the wet drywall compound from causing the screw head to rust. Although the coating does help prevent rusting, it doesn't stop rusting altogether, which is why black drywall screws are recommended only for indoor projects, due to their tendency to sometimes rust. In addition, drywall screws aren't terribly strong, so they're not a good choice for weight-bearing items -- for example, to attach a bookshelf to a wall. Basically, they're meant to attach drywall to a wooden frame and not to be misused for other purposes.

Where the screws were manufactured also has an influence on the quality, with U.S. and Canadian screws considered longer-lasting and more likely to meet your expectations. Another complaint regarding imported black drywalls screws is that they sometimes leave slivers in your skin, something a higher-quality screw won't do.

Frequently Asked Questions

Can I prevent black drywall screws from rusting outdoors?

Yes, consider using outdoor-rated screws made of stainless steel or coated with corrosion-resistant materials like zinc or galvanized steel. Additionally, ensure proper installation by countersinking the screws and sealing the screw heads with waterproof caulk or sealant to protect against moisture intrusion and rust formation.

Are there any alternative fasteners to black drywall screws?

Yes, there are alternative fasteners available that are less prone to rusting than black drywall screws. Options like exterior-grade deck screws, stainless steel screws or coated screws designed for outdoor use can provide better resistance to rust and corrosion, making them suitable for outdoor DIY projects where moisture exposure is a concern.