Rust stains!

Discussion in 'General Gardening Discussion' started by Fat Controller, Jul 14, 2018.

  1. Fat Controller

    Fat Controller 'Cuddly' Scottish Admin! Staff Member

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    Is there an easy, cheap, way to get rust stains off concrete patio slabs? We had a firepit that filled with water a couple of years back, then it perforated and through winter dripped rusty water onto the patio, leaving a rusty stain. I have pressure washed it, but it won't shift.

    Any ideas?
     
    Fat Controller, Jul 14, 2018
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  2. pete

    pete Growing a bit of this and a bit of that....

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    Bleach????
    Diluted slightly.
     
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      pete, Jul 14, 2018
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    • Phil A

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      Wet it well then put a poltice on it, cover and let it dry out and hopefully the rust will be drawn into the poltice which you remove and give to someone you don't like :)
       
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        Phil A, Jul 14, 2018
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      • Fat Controller

        Fat Controller 'Cuddly' Scottish Admin! Staff Member

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        I did wonder if bleach would do it - I have used the thick stuff on the patio before, neat, when we first moved in as there was loads of black spots all over the place (plane exhaust I reckon); I will need to get some more with our next shop then. Thanks pete
         
        Fat Controller, Jul 14, 2018
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      • Fat Controller

        Fat Controller 'Cuddly' Scottish Admin! Staff Member

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        What sort of poltice @Zigs?
         
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          Fat Controller, Jul 14, 2018
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        • pete

          pete Growing a bit of this and a bit of that....

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          Bread poultice??
           
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            pete, Jul 14, 2018
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          • Fat Controller

            Fat Controller 'Cuddly' Scottish Admin! Staff Member

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            No chance - Mrs C feeds the birds so much that they sit in the plum tree waiting for her, or wander about the patio looking in the patio doors to see where she is! They would have a bread poultice away in no time, especially the magpies and pigeons
             
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              Fat Controller, Jul 14, 2018
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            • NigelJ

              NigelJ Total Gardener

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              You could try scrubbing with oxalic acid solution, if you can get any. Iron oxalate is soluble. Citric acid might work as well, haven't tried that one, but easier to get.
               
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                NigelJ, Jul 14, 2018
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              • pete

                pete Growing a bit of this and a bit of that....

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                Oxalic acid, stewed rhubarb leaves?:biggrin:
                 
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                  pete, Jul 14, 2018
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                • Phil A

                  Phil A Guest

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                  Leaves contain malic acid, stems got oxalic :)

                  Trouble is, I've got FC's rhubarb plant:doh:

                  We usually use clay, but papier maché would do :)
                   
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                    Phil A, Jul 14, 2018
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                  • Fat Controller

                    Fat Controller 'Cuddly' Scottish Admin! Staff Member

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                    I've got citric acid in stock; paper mache is also do-able. Thanks guys :)
                     
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                      Fat Controller, Jul 14, 2018
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                    • Phil A

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                      Take before and after pics so we can see the big hole :)
                       
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                        Phil A, Jul 14, 2018
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                      • ricky101

                        ricky101 Total Gardener

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                        Hi,

                        Found that readily available Cider or White Vinegar removes most but not all of the stain, flood the area then rub with a stiff brush etc, might need a few goes.
                         
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                          ricky101, Jul 14, 2018
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                        • pete

                          pete Growing a bit of this and a bit of that....

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                          Where do you go to buy a bottle of paper mache.?:lunapic 130165696578242 5:
                           
                          pete, Jul 14, 2018
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