Slide
Show #1
Ten slides that illustrate
the formation of flash rust on clean steel surfaces. Takes about 2 min to show.
Uses RealPlayerŽ
WASTE WATER
What to do with waste water? Download
the "Boatyard Wastewater Treatment Guidelines" or download
the "Shipyard Wastewater Treatment Guidelines". This March 1996
Document was produced by the King County Pollution Control Division and was
originally published by the Municipality of Seattle, Washington. Offered here by
permission of the Industrial Waste Section of the King County Water Pollution
Control Division.
Development of
Flash Rusting on Cleaned Steel Surface. About 10min/frame
Flash rusting is a "term" that is very difficult to
describe. In the example above, residual water
is allowed to evaporate on a clean metal surface that has been
tested for salt contamination
using a ferricyanide paper test. No salt was found in the area in
which the "flash rusting" was found
to occur. The loose oxide reoccurred in a few active areas when
wetted with water. Oddly enough,
the one small area (far right) that tested positive for salt never
formed any patches of flash rust.
We use a SVHS video camera with a frame rate of one frame per
minute and extracted every tenth
frame for this series of pictures. The optical magnification is
about 5X. |
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