How to Remove Rust Stains on Concrete

Unsightly orange rust stains on cement floors are almost inevitable. Lawn furniture, paint cans, and even planters can rust with wear and create stains before you notice. Rust stains can be removed from concrete with a little work. New stains can be removed with common household products with relative ease. Set-in stains that have existed for a while may need a commercial product.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Vinegar
• Lemon Juice
• Sponge
• Scrub brush
• oxalic acid

1. Sweep the area to remove any dirt and debris. If the area is soiled, a quick wash will get it ready to stain removal.

2. Pour plain household vinegar on the stain. It doesn't matter if you use cider vinegar or white vinegar. The acid the vinegar is what does the job and both contain the needed ingredient.

3. Allow the vinegar to set for 15 to 20 minutes. Scrub with a stiff bristled brush and rinse with plain water. Repeat to remove any stubborn stains.

4. Try lemon juice to remove rust stains on cement. Pour undiluted lemon juice on the stain and allow it to set for 15 to 20 minutes. Scrub with a stiff bristled brush and rinse with water. For stains on foundations or walls, simply fill a spray bottle with lemon juice and spray down the area.

5. Remove stubborn stains with a commercial products containing oxalic acid. This may remove those difficult stains that lemon juice or vinegar couldn't remove, but it is toxic and should be used as last resort. You must use it with care around children or small pets. It generally comes in a crystallized form that is mixed with water. Follow the directions on the package. Be sure to rinse thoroughly after cleaning. Catch the run off if it is near plants as it will kill them. You should always store toxic compounds in a locked cabinet away from young children.

Tips & Warnings

• Clean rust stains as soon as you notice them. The longer they set, the more difficult it will be to remove them.
• Check the legs of lawn furniture often. If the painted surface wears off, metal legs will rust and stain your concrete. To prevent this, repaint the surface as soon as you notice wear.
• Avoid placing metal containers directly on concrete. Moisture will cause rust to form and create rust stains on the concrete.
• Use caution when using oxalic acid. It is toxic to pets and children and may kill plants or shrubbery.