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Zinc-plated steel is a low carbon steel for general
use. Relatively inexpensive, with the zinc plating
providing moderate
corrosion resistance suitable for indoors or otherwise
dry conditions. Color is either a blue-ish tint or
yellow depending on the
exact process.
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Hot-dipped galvanized steel has a thicker zinc coating
for better corrosion resistance, making it suitable for
outdoor use.
Because of the thick plating, only galvanized nuts and
washers will fit galvanized bolts. The coating
typically has a rough, dull
grey finish.
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Stainless steel offers good corrosion resistance,
making it suitable for outdoor use and marine
applications, but is more
expensive than zinc plated.
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Chrome and nickel plated steel are smooth and polished
for appearance. The plating offers moderate corrosion
resistance.
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Brass and bronze are copper alloys with good corrosion
resistance. More expensive than steel, these materials
are typically used
for decorative applications. Colors can vary
significantly.
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Alloy steel is highly hardened and usually black oxide
and/or oil coated, offering little corrosion
resistance.
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