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Rust in concrete

Discussion in 'Power Washing' started by snowman682, Aug 30, 2010.

  1. snowman682

    snowman682 LawnSite Member
    from N. MI
    Posts: 27

    I have a concrete side walk I am doing. It has rust on it, not hard water, not metal in the concrete, but rust/metal from years of snow removal. It is pretty bad in spots. Just tried a mix of 24oz of oxiolic acid to 2 gallons of water and it didnt touch it. Any suggestions?
     
  2. Certified MD Roof Cleaner

    Certified MD Roof Cleaner LawnSite Member
    Posts: 41

    I'd try mixing a lil stronger. Try another 8-12oz per gallon. If that doesnt work u can try Super Iron Out or RustAid. I usually have to mix my oxalic really strong to get it to remove rust. Spray it on, let dwell, re apply, let dwell. Its a hurry up and wait process.
     
  3. snowman682

    snowman682 LawnSite Member
    from N. MI
    Posts: 27

    this is what i have. it is shiney cuz it is wet. going to try muriatic acid next

    IMG00232-20100829-2155.jpg

    IMG00234-20100829-2156.jpg
     
  4. snowman682

    snowman682 LawnSite Member
    from N. MI
    Posts: 27

    it is metal that rubbed off of cutting edges for snow removal for years. having my doubts on getting it off with chems. might be taking grinder with me next time. i know that will work!!!!
     

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