Resistant to or protected against corrosion; unable to be corroded or eaten away by chemical action.
Compound of 'corrosion' + 'proof' (from Old French 'prove' meaning 'to test'). This modern technical term emerged in the 20th century as engineers needed to describe materials resistant to corrosion.
No material is truly 'corrosionproof'—even stainless steel corrodes eventually, just much more slowly than regular steel, so 'corrosionproof' is really marketing language for 'corrosion-resistant-enough-for-practical-purposes!'
Complete word intelligence in one call. Free tier — 50 lookups/day.