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Overview and Application Examples of ANC-Compass Software for Predictive Modeling of Ant Nest Corrosion

Ant nest corrosion, also known as formicary corrosion, refers to the rapid failure of copper tubes due to micro-pitting (tunneling) under the conjoint action of oxygen (air), moisture and a weak organic acid. Statistics shows that approximately 10% of all premature failures of copper tubes used in the heating, ventilation and air-conditioning (HVAC) industry is the direct result of ant-nest corrosion on a worldwide scale. Copper tubes used in other applications, including heat pumps, dehumidifiers, air coolers, heat exchangers, freezers, and chiller units, are also susceptible to ant nest corrosion or formicary corrosion.

ANC-Compass is the only device and OS independent software tool on the market for the modeling and prediction of ant nest corrosion (formicary corrosion) in copper tubes. Designers, OEM engineers, consultants, operation personnel, maintenance and inspection engineers can quickly and accurately determine: (1) the corrosion rate of copper tubes under the prevailing operating condition; (2) the effects of moisture, oxygen, and temperature on the corrosion rate; and (3) the life expectancy of copper tubes under the prevailing operating conditions. ANC-Compass is a cloud-based software that works on any device running any OS without the need for users to install or download anything.

Figure 1 below shows the user interface of ANC-Compass. Using ANC-Compass is as easy as 1-2-3.

(1) Enter the design data

(2) Enter the service environment data

(3) Review the prediction results

Figure 1 ANC-Compass models and predicts ant nest corrosion (formicary corrosion) in copper tubes.

Under the prevailing operating conditions shown in Figure 1 above, the predicted corrosion rate is 37 um/y, and the predicted tube life is 6.677 years. Figure 2 shows that ANC-Compass also models the  effect of oxygen on ant nest corrosion. Users have the option to enter the measured oxygen concentration if the exposure environment is not ambient atmosphere. Figure 3 shows the effect of relative humidity (90%RH in Fig.3 vs. 100%RH in Fig.1) and temperature (18^oC in Fig.3 vs. 33^oC in Fig.1) on the ant nest corrosion rate.

Figure 2 ANC-Compass models the effect of oxygen on ant nest corrosion.

Figure 3 ANC-Compass models the effect of relative humidity and temperature on ant nest corrosion.

The powerful applications of ANC-Compass are truly unlimited in engineering design, materials selection, process operation, inspection and maintenance, modeling and prediction of ant nest corrosion in copper tubes.

Click here to contact us for licensing details and experience the power of ANC-Compass.

ANC-Compass, giving you the right directions in the Modeling and Prediction of Ant Nest Corrosion (Formicary Corrosion).

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