How to get rust out of clothes

Why rust needs an acid, not bleach

Most household stain removers work on organic stains: enzymes break down proteins, detergents lift oils, and bleaches oxidize colored compounds until they fade. Rust is a mineral. It is iron that has already been oxidized, so an oxidizer cannot remove it. What works is an acid or a reducing agent that turns the iron back into a soluble form that rinses away. That is why the classic remedies are lemon juice, cream of tartar and commercial rust removers that contain oxalic acid or sodium hydrosulfite.

Chlorine bleach is the one thing to keep well away. The University of Georgia Extension warns that chlorine bleach sets rust stains, and in iron rich water it can create new rusty deposits on fabric. Hydrogen peroxide and oxygen bleach are oxidizers too, so they are not a reliable answer to rust itself. UGA does list an oxygen bleach soak for white items, and it helps with other stains mixed in, but the acid methods below come first. Before any treatment, read the care label, test on a hidden seam, and keep the garment out of the dryer until the stain is gone, since heat can set anything mixed into the mark, such as oil or sweat.

Remove rust with lemon juice and salt

This is the method UGA Extension lists first for washable fabrics, and it works well on white and colorfast cotton, linen and polyester. Lemon juice supplies citric acid, the salt holds the juice on the stain and adds a little scrubbing action, and sunlight speeds the reaction as the fabric dries.

1. 01

   Lay the stain flat

   Place the garment on a towel with the stained area flat and a folded paper towel beneath the stain so rust does not transfer through to the other layer.

2. 02

   Salt and lemon

   Sprinkle a generous layer of table salt over the stain, then squeeze fresh lemon juice over it until the salt is saturated. Bottled lemon juice works too.

3. 03

   Dry in the sun

   Leave it in direct sun until dry, which can take one to several hours. Keep colored garments in the shade or check them often, because acid plus sun can lighten some dyes. The orange should fade as it dries.

4. 04

   Rinse and check

   Brush off the salt, rinse the area in cool water and look closely. If a shadow remains, repeat once or twice before washing.

5. 05

   Wash as usual

   Wash the garment following its care label and air dry. Only put it in the dryer once no trace of rust remains.

Vinegar, cream of tartar and other kitchen acids

Does vinegar remove rust stains? It can help on light, fresh marks, because acetic acid dissolves rust, but it is weaker than lemon juice on fabric. Soak the stain in undiluted white vinegar for 30 minutes, work it gently with your fingers, rinse and repeat, and see our guide to white vinegar in laundry for what vinegar can and cannot do. Never combine vinegar with chlorine bleach; the mixture releases toxic chlorine gas.

For sturdy white cotton or linen that can be boiled, UGA Extension suggests boiling the stained item in a solution of 4 teaspoons of cream of tartar per pint of water (about 500 ml) until the stain lifts. Cream of tartar is an acidic salt of tartaric acid. Check that the fabric and any trims can take boiling, which rules out most modern garments with elastic, synthetic thread or printed designs. It suits old linen napkins and cotton dish towels more than shirts.

Use a rust remover for clothes on stubborn stains

When lemon and salt do not shift an old or dark stain, a commercial rust stain remover made for fabric is the next step. These products usually contain oxalic acid or sodium hydrosulfite, which reduce rust to a form that rinses out. UGA Extension advises applying them carefully and exactly as the manufacturer directs. Wear gloves, work in a ventilated room, pretest on a seam, rinse thoroughly, and keep them away from children.

Some rust removers sold for sinks, toilets and metal contain stronger acids that are not meant for clothes at all and can burn skin and weaken fibers. Use only a product whose label says it is for laundry or fabric. Rust removers can affect some dyes, so on colored clothes test first and never leave the product on longer than the label says.

How to get rust out of clothes after drying

Is rust a permanent stain? Usually not, even after a trip through the dryer, which is one of the reassuring things about it. Heat bakes organic stains into fibers, but rust stays a mineral deposit that acid can still reach. Old stains simply need longer and more repetitions: two or three rounds of lemon and salt, or a fabric rust remover, left for the full time allowed. What can be permanent is damage from the rusty object itself, such as a weakened spot where a metal button or a nail sat against wet fabric for months.

If the stain has been treated with chlorine bleach already, the odds drop. Try a fabric rust remover, which is your best chance, and accept that some pale yellow may remain. On white clothes, a final wash following our guide to washing white clothes can even out any faint shadow left behind.

Rust on silk, wool and dry clean only clothes

Acids and sunlight are hard on protein fibers. Lemon juice can weaken silk and alter its dyes, and wool reacts to heat and strong chemicals, so skip the home remedies on both. For washable silk, you can try a very small dab of diluted lemon juice on a hidden area first, rinse within minutes, and follow our guide to washing silk. For anything valuable, tailored or marked dry clean only, take it to a dry cleaner and say it is rust, since they use specific rust spotting agents.

Rust also appears on leather and suede from buckles and studs. Those are not fabric stains in the same sense, and water and acids leave their own marks there. A leather specialist is the safe route.

Stop rust stains from coming back

When a whole load comes out with orange spots or a yellow cast, the source is usually the water or the machine, not a single object. Iron in water, common on private wells, is colorless until it meets air, heat or bleach, then turns orange and settles on fabric. The EPA's secondary standard for iron is 0.3 milligrams per liter, above which reddish or orange staining is expected. A water test tells you whether that is the cause, and an iron filter or softener is the long term fix. Meanwhile, avoid chlorine bleach entirely and use a laundry rust remover in the wash as directed.

Check the machine too. A chipped drum, a rusty hardware piece inside the tub or a corroded water heater can deposit rust, and our guide to cleaning a washing machine covers inspecting the drum. For clothes, empty pockets before washing, swap old metal hangers for coated or wooden ones, and never leave wet clothes against metal furniture or in a damp car trunk.