What's this?

Discussion in 'Painters' Talk' started by teabreak, Jul 28, 2014.

  1. teabreak

    teabreak Screwfix Select

    White rust.JPG

    Just clearing out some junk from the workshop and found these paint tins I have heard of “white rust” on galvanised or aluminium. But this seems to be coming from the seam of the paint tin which if anything would be solder or simply a crimped seam.

    Just curious, any ideas about what it is?

    I guess even as its masonry paint brick salts are out of the question,:rolleyes: unless it’s Sandtex “now with genuine added brick!”:p:p:p
     
    thelockman likes this.
  2. Sean_ork

    Sean_ork Screwfix Select

    it's either your other half has spilt some fancy salt - or it's galvanic corrosion, two dissimilar metals etc

    where's the chemist gone ......
     
  3. proby

    proby Active Member

    That stuff should be going into a soak away;)
     
  4. tom.plum

    tom.plum Screwfix Select

    yes keep it at least 500mm away from the foundations :oops:
     
  5. plumberboy

    plumberboy Well-Known Member

    I don't know what it is but looks like you don't put the lids back on your paint very well.:):):):)
     
  6. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    It's battery acid(electrolyte?). See if you got a voltage between seams.

    Mr. HandyAndy - Really
     
  7. plumberboy

    plumberboy Well-Known Member

    How's the new electric hammer Mr Handy.:)
     
  8. Mr. Handyandy

    Mr. Handyandy Screwfix Select


    Do you know, he never got back to me when I asked if he had a 110v version with a longer lead!

    Mr. HandyAndy - Really
     
  9. plumberboy

    plumberboy Well-Known Member

    Strange must be 240v with a short lead then,such a shame would of been a good buy.:)
     
  10. Mr. Handyandy

    Mr. Handyandy Screwfix Select


    Yeh, and only £100 postage(it's still there if you really want it) :)

    Mr. HandyAndy - Really
     
  11. plumberboy

    plumberboy Well-Known Member

    Sounds to good to be true Mr Handy.:)
     
  12. teabreak

    teabreak Screwfix Select

    Shhh! don't say anything I'm trying to keep a lid on it:D
     
    plumberboy likes this.
  13. Jitender

    Jitender Screwfix Select

  14. moppylhd

    moppylhd Member

    There are white residue problems with water soluble fluxes and many of the causes not
    related to the flux compositions are the same as for rosin fluxes. The organic water
    soluble flux itself is more likely to oxidize and decompose than a rosin flux because
    generally the water soluble organic acids are not as heat stable as rosin acids. Halide
    (chloride and bromide) salts help reduce oxidation and improve activity but may result in
    metal salt residue that is not water soluble. Other decomposition products caused by the
    heat of soldering may also not be removed with water.

    (This is not an original thought. Therefore I cannot be held to account for any action taken on its use)
     

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