Definition
A corrosion-protection process in which steel or iron is coated with a layer of zinc, usually by dipping the part in molten zinc (hot-dip galvanizing) or by electroplating. The zinc coating shields the underlying metal from moisture and oxygen, and also corrodes preferentially to the steel if the coating is scratched, providing sacrificial protection.
Plain English
Coating steel or iron with a layer of zinc so it doesn't rust. The zinc takes the damage from moisture and air instead of the metal underneath.
Context Anchor
Seen in aircraft maintenance and materials discussions, especially when identifying corrosion protection on steel parts, brackets, hardware, or ground-support equipment.
Derivation
Named after Italian scientist Luigi Galvani, whose 18th-century experiments with electricity and metals led to the term 'galvanic.' Early zinc-coating methods used electrical processes, so the name stuck even for non-electrical methods like hot-dip galvanizing.
Why Pilots Care
Corrosion protection on airframe parts and hardware directly affects structural integrity and flight safety.
Analogy
Galvanizing is like giving steel a protective outer skin. If the skin gets scratched, the zinc still helps take the damage first instead of leaving the steel immediately exposed.
Intuition Check
Galvanizing does not mean simply making metal shiny. It specifically means protecting iron or steel with a zinc coating.
Example Sentence 1
The control cables on the aircraft are made of galvanized steel to resist corrosion in humid conditions.
Example Sentence 2
New bolts for the engine mount were ordered with galvanizing to resist moisture in the engine compartment.