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Overview of HCl-Compass

Figures below demonstrate the operation of HCl-Compass. With HCl-Compass, corrosion prediction and materials selection for HCl services are as easy as 1-2-3.

(1) Select the material from the dropdown list,

(2) Enter the temperature and the concentration of hydrochloric acid (or the pH, or the chloride concentration)

(3) Review the prediction results

HCl-Compass predicts the specific gravity, the freezing point, and the boiling point of the hydrochloric acid (HCl), the corrosion rate of the selected alloy at the specified temperature and concentration or pH, and the remaining life of the component. In addition to that, HCl-Compass also plots the isocorrosion diagram for the selected alloy so as to give users a complete picture of the corrosion behavior of the selected alloy across the entire ranges of the HCl acid concentration and the service temperature.

Figure 1 HCl-Compass Predicts the Corrosion Rate of Alloys in Hydrochloric Acid Corrosion Services

Figure 2 HCl-Compass Predicts HCl Corrosion and Simplifies Materials Selection for Hydrochloric Acid Services

For equipment and piping systems directly handling hydrochloric acid, users can use the acid concentration (wt%) as input parameter to predict the HCl corrosion rate (Figure 3). For dilute HCl condensate as is the case in crude distillation, hydrotreating, and catalytic reforming units where HCl forms by the hydrolysis of magnesium and calcium chloride salts and results in dilute HCl in the overhead system, users can choose to use pH or chloride concentration (in ppmw) as the input parameter to predict the HCl corrosion rate (Figures 4-5).

Figure 3 HCl-Compass Predicts and Models the Effects of HCl Concentration, or pH, or Chloride Concentration on the Corrosion Rate

Figure 4 HCl-Compass Predicts and Models the Effects of pH on HCl Corrosion

Figure 5 HCl-Compass Predicts and Models the Effects of Chloride Concentration on HCl Corrosion

The powerful applications of HCl-Compass are truly unlimited in engineering design, remaining life prediction, and materials selection for HCl services.

HCl-Compass, giving you the right directions in HCl corrosion prediction and materials selection.

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