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Discussion Starter · #1 ·
Quickly searched here and couldn't find a topic.

Put down some iron yesterday expecting rain...ended up getting a torrential downpour which left my driveway and sidewalk orange.
Called a couple pressure cleaning services and no one claims they can get it out.
Have any of you figured out how to clean it? Thanks!
 

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Had this issue before and tried everything. Nothing worked, but this stuff did. It's like a gel that you mix with water. Actually worked really good.

https://www.theruststore.com/Concrete-Rust-Remover-P66.aspx?gclid=EAIaIQobChMIv__a5Oqj2wIVQSWBCh0AegSQEAQYASABEgKXq_D_BwE
 

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John Perry just had a video where he used Lysol toilet bowl cleaner to get the iron stains off of his concrete. I used it after seeing this to get some stains off of my front porch where I had a barrel planter there for years and it worked.

https://youtu.be/6J8mga5cl0Y?t=6m47s
 

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I would consider mixing up a 10% by weight (.8 lbs of citric acid to 1-gallon water) citric acid solution and spray it down on the concrete then use a broom to soak it in. Then let it sit for 20 minutes. It should remove all the iron. Citric acid is an extremely strong iron chelator and will remove all of it. I use 10% citric acid at my job to remove iron from welds on stainless steel pipes to improve corrosion resistance.
 

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Passivate weld areas so they do not corrode? Citric acid is good for that. I will second the Citric acid for cleaning concrete that is iron stained. Works well and turns the iron into the Citrate form which is a fertilizer. I have known people who have used Hydrochloric Acid for cleaning concrete and ended up with killed trees and dead grass. Phosphoric acid is an alternative that will not kill grass, but it is much harder to find. You can buy Citric all day long on Amazon.
 

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Discussion Starter · #11 ·
Rockinar said:
Had this issue before and tried everything. Nothing worked, but this stuff did. It's like a gel that you mix with water. Actually worked really good.

https://www.theruststore.com/Concrete-Rust-Remover-P66.aspx?gclid=EAIaIQobChMIv__a5Oqj2wIVQSWBCh0AegSQEAQYASABEgKXq_D_BwE
This was the solution
 

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Jericho574 said:
Rockinar said:
Had this issue before and tried everything. Nothing worked, but this stuff did. It's like a gel that you mix with water. Actually worked really good.

https://www.theruststore.com/Concrete-Rust-Remover-P66.aspx?gclid=EAIaIQobChMIv__a5Oqj2wIVQSWBCh0AegSQEAQYASABEgKXq_D_BwE
This was the solution
Glad it worked for you. Its not cheap, but it works.
 

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what do ppl think about Evap-o-rust in this situation? That stuff is mainly EDTA, the same chemical used to chelate iron in iron supplement spray formulas. I wouldn't suggest using evaporust on lawns with fe because I know there's other stuff in the bottle along with the EDTA. But for use on iron stained concrete it seems promising.
 
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