- not subject to rusting.
- to coat with a substance that prevents rusting.
Origin of rustproof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rustproof
It is rustproof and is not attacked by sulfuric, nitric or acetic acid, hot or cold, diluted or concentrated.Creative Chemistry
Edwin E. Slosson
Covered with rustproof paint (or galvanized) it will last a life time.
- treated against rusting