Updated at: 25-05-2022 - By: Helen Skeates

How can you remove rust stains from concrete using the power of the water pressure washer? If so, use rust remover on the surface before attempting to remove the rust spots. Here are a few examples to give you an idea of how simple it is:

Then use a power washer to clean it off for best results. If the stain appears to be remaining on the concrete, you’re performing your work incorrectly. In determining which rust remover to use, consider the amount of time the stain has been on the concrete. It becomes more difficult to remove it if it has been on the concrete surface for a long time. If you don’t know how old the rust stain is, start with the tiniest amount of rust removal. When all else fails, go back to the original rust stain removal method. Until then, my friends, here are some more things you need to know!

What Causes Rust Stains on Concrete?

If rust spots are emerging on your driveway or patio, there are a number of possible causes.

Pressure Wash - Remove Rust Stains from Concrete Sidewalk - Winter Weed Control Update - YouTube

Fertilizers and Plant Foods

Fertilizers are one of the more surprising causes of rust stains in concrete, according to many homeowners. Fertilizers include a wide range of metals in them, but many people aren’t aware that they also contain compounds such as sulfur or nitrogen.

If you fertilize your lawn, you’ll likely see some of the fertilizer on the sidewalk. As long as this fertilizer isn’t washed away, it can become embedded in the porous concrete, where it reacts with air and water to generate unsightly orange spots in the ground.

Wet Tools or Furniture

Other sources may be easier to identify. Patio furniture, planters, gardening tools and even a metal fire pit that is left out in the weather will rust onto the concrete, causing the concrete to deteriorate over time. The homeowner may not notice the rust stains until after the furniture has been moved and an orange outline can be seen on the concrete.


However, rust spots on concrete might be caused by the material itself. Concrete walls and driveways are frequently reinforced with rebar.

Even while rebar won’t pose an issue as long as it is entrenched in the concrete, when the concrete wears away, the metal will come into contact with the air and water and rust. When it rains, this rust will run down concrete walls, patios, and driveways, leaving an orange and unattractive rust trail in its wake….

This includes the concrete itself. Metal particles in the form of ironstone or coal are incorporated into some types of concrete. A patio, driveway, or garage floor can become covered in rusty orange splotches when concrete wears away and exposes these particles to the elements.

Flowing Water and Irrigation Systems

It’s possible that the water in your house is to blame. In homes with hard water, irrigation systems may transport a little quantity of iron in the water. When water from an irrigation system is sprayed onto a sidewalk, patio, or driveway, small metal particles get trapped in the concrete and begin to rust.

Steps To Remove Minor Rust Stains From Concrete With Pressure Washer

Before attempting a rust treatment, make sure the concrete surface you’ll be working with is sound. The painted and acid-treated concrete surface is fragile. Acidic cleaning products might potentially damage it. When cleaning a painted concrete surface, dilute the cleaning solutions before using them. One part cleaning solution to one part water is all that is needed. When you’re ready, gather the necessary equipment, such as a pressure washer, water, detergent, rubber gloves, vinegar or pure lemon juice, and so on. Pressure washing can be used to remove rust stains from concrete.

Step #1. Cleaning the concrete surface with water and soap

Water and soap can be used to remove rust stains from concrete. Remove any grease or grime that may be on the surface of the vehicle. Acids can be removed from the concrete surface by a thick layer of dirt and filth. Because of this, it progressively removes the rust stain from the surface.

Step #2. Rinsing off the solution

Make sure to rinse the concrete surface with a solution of soapy water. Cleaner water can then be used. Clear the concrete surface of soap residue next.

Step #3. Applying lemon juice

Discolorations caused by rust can be removed using undiluted lemon juice. Lemon juice is a good stain remover because of its high acidity.

Step #4. Soaking the concrete surface with lemon juice

Soak the concrete surface with rust stains with lemon juice. Allow the liquid to sit for ten to fifteen minutes. Allow the lemon juice as it steeps for fifteen minutes and penetrates the area intensely. It then reacts with the stain.

Step #5. Rinsing the acid with pressure washer

Lemon juice can be used to remove rust spots from concrete. Ten to fifteen minutes is a good amount of time to let the liquid sit. Take a fifteen-minute break from the lemon juice and let it soak in for that time. Once the stain has been reacted with, it is removed.

Step #6. Rinsing the rust stains

Make a solution of lemon juice and water and apply it to rust-stained concrete. Wait ten to fifteen minutes before using the liquid. Allow the lemon juice to sit for fifteen minutes before applying it to the affected area. Afterwards, the stain is reacted to.

Step #7. Replace white vinegar with lemon juice

Lemon juice can be used to remove the rust stains from concrete. Wait ten to fifteen minutes before using. Allow the lemon juice to sit for fifteen minutes before applying it to the region. Once the stain has been reacted with, it is finished.

Steps To Remove Major Rust Stains

If the lemon juice and white vinegar treatment fails, you’ll know it’s a substantial rust stain. Choose a stronger acid or a commercial rust cleaner instead. Oxalic acid is the best rust stain remover for concrete. I’d recommend reading up on how to remove rust with oxalic acid first.

Trisodium phosphate and hydrochloric acid, for example, are found in some acids that are diluted in water. Discoloration can occur if hydrochloric acid is left on concrete for too long. If you intend to stay in the acidic solution for a long period of time, dilute two parts with one part of water. Because of this, the color of the surface does not change. Because acids are corrosive, take sure to read and heed the cautions on the bottle label. Make sure you’re covered up. Assemble the necessary equipment such as a pressure washer, rubber gloves and safety glasses in addition to the usual assortment of water, soap, rust remover and long-sleeve shirts and jeans.

Step #1. Gathering the equipment and  materials

Gather all the necessary equipment and materials.

Step #2. Cleaning the concrete surface with water and soap

Water and soap will remove rust stains from concrete. Yes, it does get rid of the grease and grime on the floor. The acid’s ability to penetrate the concrete can be hampered if the surface is contaminated with dirt.

Step #3. Rinsing the stained area

Use water to clean the rust-stained area. Allow it to air dry. Never apply a commercial type of rust cleaner to the wet spot. If not, it could have a negative impact on its efficacy. When in doubt, consult the package.

Step #4. Applying rust remover

To remove rust stains from concrete, use a rust stain remover. Take the time to read the bottle’s instructions and safety instructions.

Step #5. Allow the rust stain remover to sit still

It is best to let the rust stain remover or acid sit for a bit before moving on. The concrete surface can be damaged if the mixture is allowed to sit for an extended period of time.

Step #6. Rinsing using a pressure washer

After the steeping period is up, use a power washer to clean the concrete. Pressure washers are more effective than scrubbing brushes since they have eighty times the pressure of a hose. Rust stains on a concrete surface are now handled more successfully by this washer.

Rust Removal | How to remove rust, Rust, Pressure washing

What Causes Rust Stains?

Rust stains on concrete can occur for a variety of causes. And water is a common theme.

  • Rust is inevitable if metal and concrete are constantly in touch and the metal is frequently moist.
  • It’s possible your concrete will rust if some natural stones have rust components in them. This can cause a significant discoloration of the concrete.
  • Rust can occur as a result of a battery acid leak or fertilizer overspray.
  • Rust can also be caused by radiator drips, rusted patio furniture, and spray irrigation water. To prevent rust stains, make sure your concrete surfaces are properly drained and sealed. Make sure that water does not sit on the concrete for an extended period of time. In the event that your concrete comes into contact with metal, you should first address any leaks.

Rust in Commercial Settings

Rust is a common complaint among homeowners, but for commercial property owners and facility managers, the issue is considerably more serious. Rust is a corrosive that can be found in practically any environment. All outdoor constructions are susceptible to rust due to the widespread usage of metals and water in industrial and commercial settings.

Rust stains are particularly difficult to remove from brick and concrete. In metal buildings, crevices can become rusty and extend over the length of a wall, so keep an eye out for it.

In little time at all, it’s all over your front and back porches. For your staff, it might pose a danger by devouring metal until there is nothing left.

Pressure Washing Removes All Rust

Pressure washing services are highly recommended by commercial cleaning experts due to their high power and use of the most recent cleaning technology in removing even the toughest rust.

Using pressure washers to remove paint from metals is also a great way to clean.

High pressure and a high flow rate help remove the difficult rust stains from the famous machinery.

With 6500 PSI pressure and an 8 GPM flow rate, professional rust removal services can easily remove rust and corrosion.

Professional pressure washing services are also adept at removing stubborn rust stains with safe cleaning chemicals.

DIY vs. Professionals

Buying rust removers over the counter may contain a lot of chemicals. As a result, it will do more harm than good. It is possible that the acid will dissolve the cement paste in your concrete, resulting in an etching of the concrete around the stain. Your surface could be permanently harmed by this.

Rust removal services provided by experts in the field can be tailored to your specific needs. Your surface’s original appearance can be restored thanks to their services. One-time treatments, event-specific services, and on-demand visits are all options; you can pick and choose what works best for your schedule and your budget.

Rather than spending the time and money to learn the ins and outs of pressure washing, as well as risking the integrity of your surface, hire a professional instead. Professionals can manage any type of garage, driveway, or fence installation because of their training, experience, and expertise.

Remove Rust From Large Areas

Pressure washing is the only way to get rid of rust from large surfaces like industrial walls or a building’s facade.

Because of the poor surface covering, using a brush, whether mechanical or manual, may be ineffective. It might also be pricey. However, power cleaning removes dirt and grime from the surface far more quickly and cheaply.

In addition, it gets your surface ready for a fresh coat of paint. In order to save money and time, you don’t need additional blasting materials. Blasting materials including glass beads, bicarbonates, and other hazardous compounds may be disposed of more easily thanks to this technology.

Most of the time, pressure washing will remove all stains completely. The professionals might need to inspect a sample of the stain before they can give you an assurance about the removal of rust stains.

Bid Goodbye to Rust with Peter’s Pressure Washing Services

It is possible to get rust removal services at reasonable pricing from Peter’s Pressure Washing. Safe and skillful methods, as well as the appropriate substances, are all part of what we do here. You can reach us by phone at 813-455-3670 for a no-obligation price quote.

How to Remove Rust Stains From Concrete: 11 Easy Ways

How to Remove Rust Stains From Concrete

Concrete rust stain removal can be accomplished in a number of ways. These include vinegar, lemon juice, lemonade and baking soda as well as washing detergent and even Coca-Cola.

For stains that have been around for a long time, or are dark or extensive, or both, you’ll need to use a more industrial treatment.

Oxalic acid, hydrochloric and muriatic acids are among the industrial-grade chemicals used in this process. CLR, for example, is a product created specifically to remove rust stains.

With industrial-strength chemicals, you must take the necessary steps to ensure your own safety. Thick, waterproof gloves for the hands, clothing that covers any exposed skin, safety eyewear, and even a respirator are all good ideas in some instances.

Aside from industrial chemicals, even home goods might pose a risk when they are combined with rust.

Make sure to spot-test any method you pick before applying it to an area of concrete that is visible. Some procedures can discolor particular types of concrete, making an already-existing problem more worse.

It’s best to test the cleaner’s efficacy on a hidden corner of concrete before relying on it to leave a permanent mark.

1. Rust Remover for Concrete

This is by far the simplest approach for removing rust from concrete if you don’t mind spending the money. Concrete rust removal is a specialty of Rust Remover for Concrete, which is unlike the general-purpose cleansers and chemicals used in most homes. Preparation is time consuming. There is a pre-mixed powder that you need to add to a separate container before using this tub. The cleanser will form a gel when mixed, and you may then spread the gel over the rust stains on the concrete.

You’ll have to put in the hours. The rust remover loses its power to remove rust as soon as it is combined. Don’t combine it until you’re ready to use it because it loses half of its potency after four hours.

Spray the area with a hose after it has dried for about 15 minutes to remove any remaining residue. Rust is supposed to wash away with it.

In spite of its effectiveness, this method can be prohibitively expensive if you’re dealing with a wide area. To clean 60 square feet, you’ll need a 22-ounce jug of rust remover.

2. Baking Soda & Laundry Detergent

A few solutions are available if you’re looking for a way to eliminate rust that doesn’t need a lot of money or effort. Baking soda and laundry detergent are the first two ingredients you’ll want to use. Use a paintbrush and scrub brush, as well as a spray bottle filled with water, to mix the baking soda and laundry detergent for this solution.

The first step is to prepare a pasty mixture of laundry detergent and baking soda in cold water. Spread the paste over the rust stains with a paintbrush until the stain is completely covered.

For about an hour, let the paste sink into the discoloration. To keep the paste from drying out before it’s time to remove it, spritz it with water on a regular basis. To keep the paste moist, you may have to apply this more frequently if the driveway or patio is hot.

Add enough water to scrub the stain with a brush after an hour. Rinse well with a hose after scrubbing.

It is the alkaline solution created by the baking soda that dissolves rust. With a good rinse, you can remove the dissolved rust from your clothes.

This approach is best suited for tiny stains rather than deep orange stains or a concrete driveway with broad stains because of the time and effort required to make and hydrate the paste.

3. Vinegar and Lemon Juice

Stains can be removed with surprising ease and effectiveness using vinegar and lemon juice. A wire brush (or nylon if you want a gentler approach) and lemon juice or vinegar are all you’ll need for this process. Instead of squeezing lemons by yourself, get a huge bottle of freshly squeezed lemon juice. Once you’ve applied lemon juice on the stain, wait around 10 to 15 minutes before rinsing it off. Then use a scrub brush or wire brush to clean it up. The goal is to dissolve the rust with the acid in the lemon juice or vinegar.

Vinegar, which is more acidic, is better at removing harder rust stains than water.

Rinse the concrete with a hose after cleaning to remove any remaining rust or vinegar. This procedure works well for removing light rust stains, but it’s inconvenient for large areas of staining. Also, it won’t work as well on stains that have been there for a long time.

How To Clean Rust Stains Off Concrete - Pacific Exterior

4. CLR

However, unlike Rust Remover for Concrete, CLR doesn’t have a specific formula for dealing with rust stains and lime and calcium deposits (thus the name). In addition to the aforementioned appliances, CLR has a long number of other uses, such as in the manufacture of toilets, sinks, and various glass, chrome, fiberglass, and stainless steel fixtures.

Nevertheless, CLR states on its website that it can be used on concrete without fear of damage. CLR’s basic constituents, which comprise water, lactic acid, and gluconic acid, effectively remove rust from concrete. CLR, on the other hand, doesn’t include any damaging phosphates, making it a safer option than the harsher chemicals we’ll discuss later.

A small inconspicuous spot should be tested to see if the paint will stain your concrete. Colored or tinted concrete, concrete that is less than a year old, or concrete that has already been stamped, sealed or coated should not be treated with CLR, according to the manufacturer.

In order to use CLR, combine one part CLR to one part water, and then apply it directly to the stain. Rinse the CLR with water after two minutes. CLR is an excellent solution for tougher stains because to its fast-acting composition and simple application.

5. Oxalic Acid

Although oxalic acid is one of the most common ways for getting rid of rust staining from concrete, it can be difficult to locate. Because of its effectiveness in bleaching wood, oxalic acid powder is available from both big-box and specialist paint stores. This approach necessitates the use of a bucket, mop, and scrub brush. Mix half a cup of powdered oxalic acid with a gallon of warm water to use. A glass or plastic container that is acid-resistant should be used to mix acids.

Mop up the stains with the solution. Ensure that the stain does not dry out by allowing the solution to work for 5 to 10 minutes.

After that, use a scour brush to remove the stain. Using this product properly necessitates keeping in mind that it contains an acid, and hence following the aforementioned safety measures. Rinse thoroughly with water when scrubbing has been completed. If the stain persists, repeat the cleaning procedure.

If you can’t find powdered oxalic acid, you may be able to get it in some industrial cleansers found at most big-box stores.

6. Trisodium Phosphate

Trisodium phosphate is another chemical of industrial strength that is useful in removing rust stains. Rust may be washed away with this chemical, which can be bought in most home improvement stores. To use TSP, you’ll need protective clothing and equipment, such as a scrub brush and a bucket, because it burns skin and eyes upon contact. Mix half a cup of TSP with half a gallon of hot water to get things started.

Allow 20 minutes for the mixture to rest on the rust stains. Stains should be scrubbed in circular motions using a nylon brush. This will ensure that all of the rust particles are in contact with the TSP. After that, make sure to give your hair a good rinse. Make sure the stain is completely removed before reapplying the product.

When it comes to eliminating rust stains, one of the most successful methods is TSP, which may also be used for other purposes.

7. Hydrochloric Acid

When it comes to getting rid of stubborn rust stains, hydrochloric acid is unmatched by any other procedure. Rust dissolves completely in this acidic chemical. You should keep in mind that it won’t just destroy rust. Because it’s one of the most harmful chemicals for getting rid of rust, you should only use it as a last resort and with extreme caution. Wearing protective gear such as gloves, goggles, and clothing that covers exposed skin is a need.

To begin, combine one part water with two parts hydrochloric acid. For up to 10 minutes, apply the mixture to the stain.

The acid should not be left on the concrete for more than 10 minutes. When this happens, the concrete will turn blue and you’ll have to deal with a new form of stain. Remove the rust by scrubbing with a scrub brush and then water.

If the stain persists after the initial treatment, repeat the procedure.

8. Simple Green Pro Heavy Duty Cleaner

Like Rust Remover for Concrete, this Heavy Duty Cleaner is suited for use on concrete. In addition to removing rust, this driveway cleaner also removes other common stains from a driveway or garage floor, such as grease, oil, and exhaust stains. Because it can be applied with a spray bottle or even a pressure washer, this product is not only safer than alternatives, but it also works well on big surfaces like a driveway or patio.

You’ll need to mix one cup of cleanser with one gallon of water in order to get started. Allow five minutes for the solution to rest on the stained area. A firm brush or push-broom can be used to scrub the area and then rinse it with a hose or sprayer to remove any remaining rust specks.

9. Muriatic Acid

By now, you’ve probably noticed something of a pattern here. This list would be incomplete without at least a few of the more potent alkalis capable of removing rust. At most big-box home improvement stores, acetone is another strong acid solution that may be purchased. Make sure to take all necessary precautions when using it, as it is both cheap and effective. Before using muriatic acid, dilute it with water in a glass or acid-resistant container, as you would with any other acid.

Make a solution of one part acid and ten parts water by drizzling the acid into the water and mixing thoroughly. Up to 10 minutes of contact time is recommended when using an acid solution to remove stains.

Muriatic acid, like hydrochloric acid, can discolor concrete if left on the surface for an extended period of time. Baking soda and water can be used to clean it. The acid will be neutralized by the baking soda.

10. Coca-Cola or Lemonade

Coca-Cola or lemonade may seem like an odd choice for removing rust stains, especially when compared to muriatic acid, yet they are. That’s because both beverages contain acid, which is the primary element needed to remove rust from metal surfaces. There isn’t much to it. Begin by drizzling the rust stain with undiluted Coca-Cola or lemonade and letting it sit for 15 minutes to allow any remaining acid to penetrate the stain and begin to dissolve it. Stains can be removed using Coca-Cola or lemonade scrubbing brushes, then rinsed with water.

As strong since some of the industrial acids on this list are, and as neither is viable for larger treatments, such as a whole driveway, this procedure provides a quick way out of minor rust spots.

11. WD 40

Most people have this lubricant and cleanser in their garage or workshop. Concrete can be cleaned of rust using the same method as is used to remove rust from tools. There isn’t much to it. A brush and some WD-40 are all that’s needed to get rid of the rust stain.

The WD-40 will penetrate the concrete and work the rust loose. If necessary, reapply to ensure that all traces of the stain have been removed.

Once you’re happy with the results, use a hose to clean up the area.

Will Pressure Washer Remove Rust Stains?

Using a power washer to remove rust stains is generally ineffective. Using a power washer to remove dirt and grime from the surface isn’t enough since rust stains penetrate concrete.

When utilized with the correct cleansers, pressure washers can be effective. In most cases, this is done by soaking the surface in a cleaner that draws the rust to the surface, and then using a pressure washer to remove the cleaner and the rust from the surface.

Does Bleach Remove Rust From Concrete?

When it comes to cleaning, bleach is a formidable weapon, but it can’t get rid of rust. Rust removal requires a different approach than using chlorine. As a result of using chlorine to eliminate rust stains, the stain will get worse. Mold and mildew can be cleaned with bleach, but rust can be removed with an acid-based solution.

Pressure Wash - Remove Rust Stains from Concrete Sidewalk - Winter Weed Control Update - YouTube

How Do You Remove Old Rust Stains?

In and of themselves, rust spots on concrete are an eyesore. Trying to remove old stains from concrete can be a real challenge. Because it has had so much time to seep into the porous concrete, removing this rust is going to be challenging.

Don’t waste your time with home cures like lemon juice and vinegar for rust stains that are more than a few years old. An even more potent acid is required. If you can get your hands on hydrochloric acid or muriatic or oxalic acid, put on the safety gear and start to work. Another option is to use a specialized solution like Rust Remover for Concrete.

Keep in mind that it may take numerous applications to thoroughly remove the stain from a dark old rust stain.

Remain optimistic despite your setbacks. If you can’t get the stain out the first time, make careful to eradicate the source so it doesn’t reappear.

How to Prevent Rust Stains From Happening

It’s true that preventing rust stains is better than having to deal with the consequences later.

A concrete patio, driveway, or garage floor that has been stained by rust is an easy problem to repair if it is prevented from developing in the first place.

Minimize the amount of metal that comes into touch with your concrete as a solution. When not in use, aluminum patio furniture should be covered or removed to keep it out of the weather and from rusting. Metal lawn rakes and shovels should not be left on concrete patios and driveways.

Both can help to keep a patio or driveway free of rust, as well as your outdoor tools and patio furniture lasting for many years to come.

Metal tools should never be left lying around in a garage if they’re damp.

Drainage via a patio or driveway should be avoided if at all possible if water carrying small amounts of metal is present. Make sure you don’t overspray these spots when irrigating your yard.

It’s A Wrap!

Using a pressure washer, you’ve learned how to remove rust from concrete. After using a pressure washer to clean it off, you’ll get the greatest results. When dealing with little stains, straight white vinegar or lemon juice works best. Incorporate the advice provided in the section on how to get rid of severe rust stains. Read adjacent articles to learn how to pressure wash concrete and how to pressure wash a concrete patio.