Page 297 - Corrosion Engineering Principles and Practice
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C h a p t e r 8
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Difficulties Caused Means of Treatment Coagulation, settling, and filtration. Imparts unsightly appearance to water. Deposits in water lines, process equipment, and so on. Interferes with most process uses. Softening. Demineralization. Chief source of scale in heat exchange Internal boiler water treatment.
Chemical Formula None—expressed in analysis as units. Calcium and magnesium salts expressed as CaCO 3 − ), Bicarbonate (HCO 3 2− ), carbonate (CO 3 expressed as CaCO 3 H 2 SO 4 , HCl, expressed as CaCO 3 CO 2 (H + ) 2− ) (SO 4 Cl −
Constituent Turbidity Hardness Alkalinity Free mineral Acid Carbon dioxide pH Sulfate Chloride TABLE 8.5
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