Scale Black
Scale Black
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 6 11220LIONELU P CHALLENGER BLACK3989 VISION LINE SCALE MASTERPIECESEALED  US $1,999.99
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 6 11210LIONELU P CHALLENGER BLACK3967 VISION LINE SCALE MASTERPIECESEALED US $1,999.99
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 LIONEL 18002 NYC 4 6 4 Hudson Scale Steam Engine 2 Tone Gray and Black US $325.00
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 WILLIAMS 41808 SCALE GG 1 PENN CENTRAL BLACK SALE US $199.00
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 Williams SP Black Widow FM Trainmaster Diesel Locomotive w Box O Scale LN US $165.00
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 Marx Toys O Scale New York Central Lines Tin Wrecker Crane Orange Black US $99.74
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![Lionel O Scale GP 9 Non Powered B Unit SP Black Widow 6 18576]](http://www.michaelrimmer.com/images/e/221013205384_0.jpg) Lionel O Scale GP 9 Non Powered B Unit SP Black Widow 6 18576] US $94.95
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 Williams by Bachmann O Scale Train Diesel 44 Ton Lehigh Red Black 22117 US $89.30
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 Lionel Trains Compatible 30 pc x 8 inch BLACK HILLS SPRUCE O Scale Scenery TREE US $59.00
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 Rare Black Art Deco Caution High Speed Trains Railroad Sign O Scale Poss Marx US $49.00
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 1991 Lionel Baltimore Ohio 51501 Hopper O Scale New Black Original Package US $42.55
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 O Scale Williams WAL 39 SP Black 40 ft Boxcar US $40.00
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 LIONEL 3469 BLACK AUTOMATIC DUMP CAR CLEAN O SCALE US $39.99
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 MTH RAILKING O SCALE BLACK STEEL ARCH BRIDGE 40 1105 NIB US $32.00
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 Williams by Bachmann O Scale Train 40 Foot Box Car New Haven Black 47041 US $30.43
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 PLASTICVILLE BLACK AUTOMOBILES SET OF 6 O SCALE US $30.00
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 10pcs 60 Black Extra Wide O Scale Roadbed for Fastrack sound deadning US $30.00
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 10pcs 60 Extra Wide O Scale 1 4 Black Roadbed for FastrackSample available US $30.00
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 MARX TOY TRAIN SET O SCALE LOCOMOTIVE TRAIN STEAM ENGINE BLACK US $29.99
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 1955 FORD PICKUP TRUCK BLACK ATHEARN 90950 O SCALE 1 50 US $29.98
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 M T H Rail King O scale 30 9097 Elevated Gate Tower Brown Black US $29.95
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 Die Cast Black Kenworth W900 Semi Tanker O Scale 143 by New Ray US $28.95
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 10pcs 60 O Scale 1 4 Black Track Roadbed Atlas others Sample available US $27.00
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 New Ray 132 SCALE DIE CAST KENWORTH W900 BLACK w CATTLE TRAILER US $26.99
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 tunnel portal g scale 2 peices solid wood black US $24.99
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what is the chemistry of black color scale from water pipe lines?
black & yellowish/brown color scales deposited in process water line, i want to know its origin,chemistry and methods to rectify these scales.thanks
Probably iron (III) oxide or hydroxide. Water in the pipes in soft water areas (low limestone) is slightly acidic because of dissolution of CO2 to make carbonic acid. On flowing through metal pipes, it dissolves small amounts of the metal -- in your case there are apparently iron pipes and so iron dissolves in the water. This is then precipitated on change in temperature or redox conditions.
Strong chemicals are marketed in various countries under various names for cleaning this. (I suggest that you go to a plumbing store and see what is available.) You can always repipe in copper. Or I think you can clean with a drill -- see
http://www.lafn.org/~dave/rodding-pipe.html
but it may be that the scale is holding the pipe together!