This powerpoint presentation begins by providing a brief overview of the three main topics of the study that included the following:
theory and background of flow-induced failures
of copper pipe;
test cells developed which can examine
cavitation and flow induced failures; and,
effects of water chemistry on copper erosion
corrosion.
The goal of erosion corrosion experiments was to develop a method to test propensity of water
to cause copper erosion corrosion at point of
high velocity, and to
determine if water produces anodic or cathodic
controlled reaction.
Test method included the following:
measure current/potential between a copper
plate in stagnant reservoir water and copper
wire surfaces.
Phase I - successful development of the first
experimental method that can test for effects
of water velocity and water chemistry on
copper corrosion, without impacts of
electrification. Phase 2 - use apparatus to study erosion corrosion
fundamentals in different waters and test the key hypothesis. Presentation conclusions indicate the following: cavitation damage is purely mechanical and cannot
be stopped by manipulating water chemistry;
high erosion corrosion currents (60 µA/cm<sup>2</sup>) can
arise from noncavitating flow;
water chemistry controlled erosion corrosion - most significant effect was hot water at low pH, and
effect decreased with orthophosphate;
in future experiments, we hope to determine how
to control copper erosion corrosion. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 16 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 46 |
| Published : | 11/01/2008 |
