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Re: Copper types for pot still

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  • roguerider01
    ... ok thanks paul for the info.... the copper extinguisher was made in 1963 i spoke to a few experts and fire nuts and they clame its 100% copper except the
    Message 1 of 16 , Sep 8, 2012
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      --- In new_distillers@yahoogroups.com, "GGB" <self.adhesive@...> wrote:
      >
      > "roguerider01" wrote: "wonder if that would be good for heavely rusted copper fire extinguisher"
      >
      > What I found was that the green-blue deposits in copper are not oxides but chlorides, carbonates and etc. Two types of copper oxide are reddish, and black. The latter forms as a result of brazing ie high temperature.
      >
      > Neat HCl will clean away all these salts but not too strong or it will eat away the copper too especially if heated - or that is what I read. I used 28% and a little 33% mixed with old 28%. From memory 35% is the strongest there is. It fumes, be careful with it, and the fumes will cause corrosion of any steel tools etc within a few feet distance over time.
      >
      > One of the types of copper chloride, green in colour, dissolves in HCl but when you wash it away with water it comes out of solution and immediately becomes a white salt.
      >
      > "Rust" ie iron oxide should not occur with pure copper. Maybe your fire extinguisher is copper plated. HCl will also dissolve rust. You could try some on an inconspicuous place. If the extinguisher is steel I can't vouch for what it will look like afterwards.
      >
      > Paul
      >
      ok thanks paul for the info.... the copper extinguisher was made in 1963 i spoke to a few experts and fire nuts and they clame its 100% copper except the head of the extinguisher which is was mixed metals i dont know what thou
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