Calcium Carbonate
Calcium Carbonate. Calcium carbonate, the most common scale in oil and gas field operations, occurs in every geographical area. Calcium carbonate precipitation occurs when calcium ion is combined with either carbonate or bicarbonate ions as follows, () Ca 2 + + CO 3 2 − → CaCO 3. () Ca 2 + + 2 ( HCO −) → CaCO 3 + CO 2 ...