Resources
Glossary
Red Rust
The reddish-brown corrosion that occurs when the steel base of any fastener, plated or coated, is exposed to moisture and begins to oxidize. Red rust damages the structural integrity and ductility of the fastener. Once red rust appears, fasteners should be replaced to maintain assembly strength and prevent equipment damage.
Rust
A destructive, reddish-brown corrosion that forms on iron or steel fasteners due to exposure to oxygen and moisture weakening their structure and impeding function. It is commonly mitigated by the use of protective finishes or corrosion-resistant materials, like stainless steel.
White Rust
A chalky, white corrosion that forms on fasteners with zinc or cadmium-based metallic finishes, such as electroplated zinc or zinc-rich coatings. White rust indicates the surface finish has started to degrade, usually due to moisture or improper storage. This residue flakes off over time, exposing the underlying steel.