Definition
A protective metallic coating in which a thin layer of cadmium is electroplated onto steel parts to resist corrosion. Cadmium-plated parts have a distinctive silvery or slightly yellowish appearance and are commonly used for aircraft hardware such as bolts, nuts, and fittings.
Plain English
A thin coat of cadmium metal applied to steel parts to stop them from rusting. It gives the parts their shiny, silvery look and helps them last longer in the harsh environment around an aircraft.
Context Anchor
Seen in aircraft maintenance, hardware identification, parts catalogs, and corrosion inspections of bolts, nuts, screws, and steel fittings.
Derivation
Cadmium is a soft, bluish-white metal named after the Greek 'kadmeia,' an old name for zinc ore, where cadmium was first found. 'Plating' comes from the Old French 'plate,' meaning a flat sheet or layer of metal. Together the term simply describes laying a thin layer of cadmium over another metal.
Why Pilots Care
It protects fasteners, brackets, and other steel components from corrosion, helping maintain airframe strength and reliability over time.
Intuition Check
Cadmium plating is not just a shiny finish for appearance. Here it means a protective coating used to help prevent corrosion on aircraft metal parts.
Example Sentence 1
The mechanic noted that the cadmium plating on several engine mount bolts had been scratched and recommended replacement.
Example Sentence 2
Cadmium plating on the engine mounts helped prevent corrosion in the salty coastal environment.