Corrosion Modeling Software and Corrosion Prediction Software Series
DWD-Compass®: Modeling and Prediction of Corrosion in Drinking Water Distribution Systems
Highly Effective Software Solutions to Copper Tube Corrosion in Drinking Water Distribution Systems
Performance Functionality Usability
Anytime Anywhere Any Device Any OS
No USB dongles No
No Browser Plug-ins
leaks in copper pipes and tubing in potable water distribution systems
in hotels, hospitals, homes and other residential, commercial, and
industrial buildings have been on the rise in recent years. The
insidious leaks not only cause losses of water but may also cause
serious damages to the walls, ceilings, fittings, furniture, equipment
and other neighboring structures. The leaks often raise health concerns
of the quality of drinking water.
Under the water chemistry shown in Figure
1 below, DWD-Compass predicts that the copper solubility is 0.565 mg/L,
the standing time to reach the US EPA's action level of 1.3 mg/L is 303
hours, the standing time to reach the WHO's limit of 2.0 mg/L is 466
hours, the corrosion rate of copper tube is 0.007 mm/y, the corrosion depth is 0.1 mm, the time-to-perforation is 34.363 years, and the mode of failure is general corrosion, erosion,
cavitation, and pitting. DWD-Compass also predicts the scaling tendency
of the specified water chemistry. The commonly used Langelier Saturation
Index (LSI) and Ryznar Stability Index (RSI) are computed for the
prevailing operating conditions. The corrosivity of water is predicted
and classified in accordance with the LSI results. In Figure
1 below, DWD-Compass predicts that the specified water chemistry is
corrosive and has no scale forming tendency.
Figure 1 Overview of DWD-Compass.
DWD-Compass models the effects of dissolved inorganic carbon (DIC) and orthophosphate on copper tube corrosion in drinking water distribution systems. The predictive engine in DWD-Compass determines the DIC based on the specified water chemistry (Figure 1). If DIC is included in the water analysis report, users of the DWD-Compass has the option to override the predicted value by checking the "Use Measured DIC (mg/L)" box (Figure 2) and enter the measured DIC for use by the software. The effects of dissolved inorganic carbon (DIC) and orthophosphate on cuprosolvency are plotted in Figure 2 and Figure 3 respectively.
Figure 2 DWD-Compass models the effect of dissolved inorganic carbon (DIC) the copper solubility.
Figure 3 DWD-Compass models the effect orthophosphate on the copper solubility.
Using DWD-Compass is as easy as 1-2-3:
(1) Copper tube design data;
(2) Enter the water chemistry;
(3) Review the prediction results (Plotting options include: Cu solubility vs. pH; Cu solubility vs. PO4; Cu solubility vs. DIC).
The powerful applications of DWD-Compass are truly unlimited in modeling and predicting corrosion in drinking water distribution systems.
DWD-Compass, giving you the right directions in managing corrosion in drinking water distribution systems.
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