Rust stains on concrete can be an eyesore and diminish the look of your driveway, patio, or other concrete surfaces. Can I pressure wash rust off concrete? Yes! Thankfully, a pressure washer is an effective tool for removing these stubborn stains and restoring the look of your concrete.
So, how to remove rust stains from concrete with pressure washer? To remove tough rust stains from concrete using a pressure washer, apply a rust removal chemical, let it sit for 30-60 minutes, scrub with a stiff brush, and then rinse thoroughly with the pressure washer using an oscillating fan spray pattern while keeping the nozzle 6 inches above the surface.
In this guide, we'll walk through 6 methods for using a pressure washer to erase those pesky rust marks. So grab your pressure washer, and let's get started!
Before we dive in, it's important to take some safety precautions when using a pressure washer:
Okay, now that safety is covered, let's rustle up these stains! (Get it? Rustle? Rust? Okay, moving on).
For light rust stains, try creating a simple cleaning solution:
The chemical reaction between the baking soda and vinegar helps break down the rust stain. Can a pressure washer remove rust? Absolutely.
For mild to medium rust stains, harness the natural acidity of lemon juice:
The acidity in the lemon juice helps dissolve rust, while the salt provides an abrasive action.
For tougher rust spots, use an oxalic acid-based cleaner:
Oxalic acid dissolves rust and leaves the concrete looking clean. Just be sure to rinse it all off thoroughly!
For large rust stains:
The degreaser helps break down the rust stain while the mechanical action of the pressure washer removes it.
When using a pressure washer, it's important to be careful not to use too high of PSI (pounds per square inch) on concrete surfaces, as this can actually damage or crack the concrete. Most standard concrete can withstand between 1500-3000 PSI before risking harm. Homeowners should aim to use pressure washers with less than 2000 PSI and use a fan spray nozzle instead of a tight zero-degree nozzle. Keep the nozzle about 6 inches away, and avoid holding it in one place too long. Also, check for any existing cracks or vulnerabilities in the concrete before pressure washing. With some simple precautions, you can use a pressure washer to clean concrete without damaging the surface.
For really stubborn stains:
The light abrasion helps remove the stain, while the water prevents dust.
Look for rust removers with oxalic or phosphoric acid designed for concrete. It does the hard work of breaking down the rust so the pressure washer can whisk it away.
If you have large or deep set rust stains, or if they cover a big area, you may need to call in a professional pressure washer service. Professionals have industrial-grade equipment and specialized chemicals to remove stubborn rust stains and restore your concrete.
For most DIYers, these 6 methods using a standard pressure washer should do the trick to revitalize your concrete and get rid of those ugly rust spots. Just take appropriate safety precautions, and you'll be able to tackle these stains yourself. So grab your pressure washer and start blasting away! That rust doesn't stand a chance.
About ProClean Pressure Washing Venice
ProClean Pressure Washing Venice is your local, expert pressure washing company serving Venice, Florida. With over 20 years of experience, ProClean can handle all your concrete, house, roof, and driveway cleaning needs. Contact the team today at (941) 236-5161 for a free quote and superior service.