FASTENERS 101™
Plating, Coating & Finishes FAQ
Frequently Asked Questions (FAQ) About Zinc Plating
Zinc Plating FAQs
Quick answers to common questions about zinc plated steel.
What is zinc plated steel?
Zinc plated steel is steel coated with zinc to enhance corrosion resistance.
How strong is zinc plated steel?
Zinc plated steel is available in several grades, including Grade 2, Grade 5, and Grade 8.
How do I cut zinc plated steel?
Zinc plated steel can be cut with any steel-cutting saw, but damaging the outer layer will accelerate corrosion.
Why should I use zinc plated steel?
Zinc plating acts as a sacrificial barrier, rusting first to extend assembly life, and is more affordable than stainless steel or silicon bronze.
What color is zinc plated steel?
It’s often a shiny silver, sometimes with a blue hue; Grade 8 may appear golden with green, yellow, or amber variations.
Can zinc plated steel rust?
Yes, it can rust and is not suitable for harsh environments.
Can zinc plated steel be painted?
Yes, use paint that adheres to zinc.
Can zinc plated steel be used outside?
Yes, but it will rust quickly in harsh environments.
How long does zinc plating last?
Durability depends on environment; it can last 5–20 years in mild conditions with proper care.
Is zinc plating environmentally friendly?
It’s less eco-friendly due to zinc mining and plating processes, but recyclable if handled properly.
Frequently Asked Questions (FAQ) About Hot Dip Galvanizing
Hot Dip Galvanizing FAQs
Quick answers to common questions about hot dip galvanized steel.
Will galvanized steel rust?
Galvanized steel may rust over time but is much more corrosion-resistant than zinc plating.
Will galvanized steel rust in concrete?
It may rust in concrete depending on the environmental conditions.
How should I cut galvanized steel?
Use protective ventilation, a mask, and goggles, and wash skin after cutting due to potential health hazards.
Why is galvanized steel preferred outside?
It’s corrosion-resistant in harsh environments, making it ideal for exterior use.
How thick is galvanized coating?
Typically 50–85 microns, depending on the galvanizing process and steel thickness.
Can galvanized steel be welded?
Yes, but it releases zinc fumes; use proper ventilation and safety gear.
Frequently Asked Questions (FAQ) About Black Oxide
Black Oxide FAQs
Quick answers to common questions about black oxide coating.
What is black oxide?
Black oxide is a chemical finish applied to metal for a sleek, finished, and lightly abrasive surface.
Will black oxide rust?
It’s susceptible to rust if marred and can turn brown in high heat.
Will black oxide screws rust?
Black oxide screws can rust if marred and may turn brown in high heat.
Will black oxide prevent rust?
It delays rust with a coated layer, often enhanced by a thin oil layer.
Will black oxide stainless steel rust?
It can rust if marred, but is less likely with proper application.
Where can I buy black oxide?
A good place to start is Black Oxide Fasteners.
Why would I use a black oxide coating?
Black oxide is often used for appearance, mild corrosion resistance, reduced light reflection, and to maintain tight tolerances without adding significant thickness.
Is black oxide durable?
Yes, but durability depends on the base material and maintenance; it’s not as protective as galvanizing.
Can black oxide be removed?
Yes, using chemical strippers or abrasive methods, but it requires care to avoid damaging the base metal.