How do I remove rust marks from fabric?
Rust is iron oxide, so it needs an acid rather than a detergent — and bleach, the instinctive choice, makes it permanently worse.
- Difficulty
- beginner
- Time
- 30 min
- Read
- 3 min
- Safety
- warning
Short answer
Lemon juice and salt on the mark, left in direct sunlight, then rinsed and washed. Repeat rather than escalating. Never use chlorine bleach: it turns rust from orange to dark brown and fixes it.
Orange marks on washing usually come from a rusting airer, a metal button, a radiator, an old washing machine drum or iron in the water supply. The stain is iron oxide bonded to the fibre, which is a mineral deposit rather than dirt, so detergent has nothing to act on.
Safety
What you'll need
- Lemon juice or white vinegar
- Salt
- Direct sunlight or a sunny windowsill
- A proprietary rust remover for fabric (optional)
Step by step
- Find the source before treating the clothes.A rusting airer, a chipped enamel drum, a corroded radiator or metal fittings on the garment itself. Otherwise every wash produces new marks.
- Keep bleach away from it entirely.Chlorine bleach oxidises the iron further and turns orange to dark brown. This is the single action that makes a rust mark permanent.
- Wet the mark and cover it with salt.A generous layer, pressed into the damp fabric. The salt acts as a mild abrasive and holds the acid in place.
- Squeeze lemon juice over the salt.Enough to soak it. Citric acid chelates the iron — it binds it into a soluble form that can be rinsed away.
- Put it in direct sunlight.An hour or more. Sunlight accelerates the reaction noticeably, and the mark usually pales visibly while you watch.
- Rinse thoroughly and repeat if needed.Two or three cycles of the same treatment beat one attempt with something stronger, and there is no risk to the fabric.
- Wash normally afterwards.Acid left in cotton weakens it over time, so a full wash with detergent is not optional.
- Use a proprietary rust remover only as a last resort.They work, but they are strongly acidic, they must never meet bleach, and many will damage wool, silk and elastane. Gloves, ventilation and a hidden test first.
Tips
- Rust marks appearing on many items at once almost always mean the airer, the machine or the water rather than the clothes.
- Cream of tartar dissolved in hot water is a gentler alternative to lemon on delicate fabrics — soak rather than scrub.
- Metal buttons and zips left wet in a pile overnight will mark whatever they are touching. Hang washing promptly.
Common mistakes
- Treating a rust mark with bleach — It converts the iron to a darker oxide and bonds it further into the fibre. An orange mark that could have been removed becomes a permanent brown one.
- Ignoring where the rust came from — The source keeps producing marks. Treating garment after garment while a rusting airer or a corroded drum keeps depositing iron is endless.
If it doesn't work
Mark turned dark brown
Cause: Bleach was used — Fix: Not reversible. Try an acid rust remover once; if it does not lift, the garment is stained permanently.
Rust marks appearing on every wash
Cause: Iron coming from the machine, the airer or the water — Fix: Check the drum for chips, replace a rusting airer, and if the water is the source fit a filter or use a water softener.
Fabric weakened or holed where the mark was
Cause: Acid left in the fibre without rinsing — Fix: Cannot be repaired. Always rinse and wash fully after any acid treatment.
Questions people ask
Will oxygen bleach work on rust?
No. Oxygen bleach is safe on colours but it works on organic stains, and rust is a mineral. An acid is the only thing that will move it.
Why do orange marks appear near the buttons on shirts?
Metal buttons or the metal in the buttonhole corroding, usually because the shirt was left damp. Dry washing promptly and check whether the buttons are marking the fabric.