Page 358 - Corrosion Engineering Principles and Practice

326 C h a p t e r 8 C o r r o s i o n b y W a t e r 327

Deposition Potential
Water Analysis at 6.2 Cycles Indicators
• Cations • Saturation Level
Calcium (as CaCO ) 1339 Calcite 38.8
3
Magnesium (as CaCO ) 496 Aragonite 32.9
3
Sodium (as Na) 1240 Silica 0.4
• Anions Tricalcium phosphate 1074
Chloride (as Cl) 620 Anhydrite 1.3
Sulfate (as SO ) 3384 Gypsum 1.7
4
Bicarbonate (as HCO ) 294 Fluorite 0.0
3
Carbonate (as CO ) 36 Brucite <0.1
3
Silica (as SiO ) 62 • Simple Indices
2
Parameters Langelier 1.99
PH 8.40 Ryznar 4.41
Temperature (°C) 36.7 Practical 4.20
1/2 Life (hours) 72 Larson-Skold 0.39
Recommended Treatment
100% Active Copolymer (mg/L) 10.53

TABLE 8.21 Calcium Phosphate Inhibitor Dosage Optimization Example

References
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