Removing and preventing rust stains on concrete

Rust stains on your concrete can tarnish the look of your commercial building’s exterior. We will help you understand the causes of concrete rust stains and how to remove and prevent them.

Causes of rust stains

Leaks from worn or rusted gutters, corroded bar supports inside the concrete, metal-bottomed furniture, or well water are common sources of rust stains on concrete.

Environmental factors, including air, water, friction, or iron alloys, can contribute to rust formation. Oxidation occurs when iron is exposed to oxygen and water, leading to iron oxide (rust) formation.

Methods for removing rust stains from concrete

Minor rust stains

First, clean the concrete with soap and water to remove dirt or grease. Soak the stain with lemon juice or white vinegar for 10-15 minutes. Scrub the rust stain with a wire or nylon brush, using a sponge for delicate concrete. Rinse and let dry. Repeat as necessary.

If you have painted concrete, use a solution of one part cleaner, one part water, and a brush that won’t scratch the paint.

Major rust stains

For major rust stains, you will need a commercial cleaner made with oxalic acid. Follow the same process as above. To protect against the acid, it is recommended that you wear gloves, eye protection, and long-sleeve shirts.

Preventative measures

• Concrete coatings and sealants can prevent rust stains, as can anti-rust paints and coatings for metal fixtures.
• Ensure you have proper drainage to avoid water accumulation and implement landscaping solutions to divert water if needed.
• Regular inspection is essential to detect rust stains early. Regular cleaning is also recommended to maintain the look of your concrete.

We provide comprehensive concrete restoration services for commercial buildings. Contact JK Industries today for your concrete cleaning, coating, or repair needs.