1. not affected by rust; resistant to rusting

Examples

• The rustless steel knife remained sharp and clean after years of use.
• Modern cars use rustless alloys to prevent corrosion.
• The rustless coating protected the metal from moisture damage.
• She preferred rustless cookware for her outdoor kitchen.
• The bridge was built with rustless materials to withstand harsh weather.
• His rustless tools looked brand new despite heavy use.