Effect of flow rate, pH, Fe/sup 2+/ concentration and steel quality on the CO/sub 2/ corrosion of carbon steels

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7167396

Videm, K; Dugstad, A

A three year project for the study of CO/sub 2/ corrosion of carbon steels was sponsored by five oil companies. Corrosion takes place without an FeCO/sub 3/ corrosion film if the FE/sup 2+/ ions in the water is in the solubility range. The corrosion rate was found to increase proportionally with CO/sub 2/ partial pressures to a power of about 0.7. A new feature revealed is that the amount of Fe/sup 2+/ corrosion products in the water is equally important as the CO/sub 2/ level. Low concentrations of FE/sup 2+/ and high CO/sub 2/ levels can lead to rapid corrosion. A surprising observation is that carbon manganese steels with about the same composition exhibited differences in the corrosion rate with a factor up to 4 in loop experiments at temperature from 60-90/sup 0/C. This was, amongst others, a result of a minor amount of chromium (up to 0.22%) in the so-called unalloyed carbon steels. Also the response to flow variations was different for the different steels.

• OSTI ID: 7167396
• Report Number(s): CONF-870314-
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBON STEELS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHROMIUM ALLOYS
CORROSION RESISTANCE
CORROSIVE EFFECTS
ELEMENTS
FLOW RATE
HYDROGEN COMPOUNDS
IRON
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBONATES
IRON COMPOUNDS
KINETICS
MAGNESIUM ALLOYS
METALS
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
REACTION KINETICS
STEELS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WATER
WELLS