For cleaning concrete pour the lemon juice or vinegar directly onto the rust stain and allow it to sit for ten minutes so the ingredients can fully penetrate the rust.
Clean rust off cement driveway.
Finally you can purchase a rust remover product.
The grass did die a few inches away from the concrete but seems to be coming back two weeks later.
Make sure the surface is clean apply the rust remover or acid following the instructions and safety precautions on the bottle let it sit for five to 10 minutes then scrub and rinse.
Mix 1 2 cup of trisodium phosphate into 1 2 gallon of hot water until the trisodium phosphate has dissolved.
For particularly stubborn stains rinse the acid away with a pressure washer.
By the way my rust stain issues are now over because i added a water softener which removes the iron from the well water.
Wear goggles and rubber gloves to protect your eyes and your hands.
Allow the driveway cleaning solution to remain on for a few minutes.
Be very careful as it tends to lighten the concrete leaving a rust free but noticeably lighter spot where you used it.
Remove the surface dirt and debris from your driveway by sweeping the area with a stiff.
How to remove rust from cement method 1 of 3.
Place the pot on the stove and bring the water to a boil.
Using the scrub brush scrub the stain using a considerable amount of pressure.
Use a brush that s appropriate for your concrete to avoid damaging it.
Rinse and wash the concrete with soap and water before beginning.
In hindsight a longer soaking would be a good idea.
Lemonade rust stain removal.
Fighting major rust stains.
Trisodium phosphate is an irritant to your skin.
A fairly new rust stain may succumb to the mild acid of white vinegar.
Follow the instructions on the package exactly.
Pour gallon of water in a pot.
Pour the vinegar over the stain let sit for 10 minutes then scrub with a stiff nylon brush.
Scrub as much as you can but if it s too deep there s not much you can do.
Rinse the area off with cold water.
How to remove the rust stains from a concrete driveway vinegar rust stain removal.
Move on to commercial cleaners if vinegar and lemon juice don t work.