A model to predict sweet corrosion of multiphase flow in horizontal pipelines

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:70031

Kanwar, S; Jepson, W P ^[1]

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1. Ohio Univ., Athens, OH (United States)

Experiments have been performed in 10 cm internal diameter horizontal pipeline to observe the effects of oil/water composition, flow velocity, and carbon dioxide partial pressure on corrosion at a temperature of 40 C. Corrosion rates have been measured for water cuts ranging from 0 to 100%, several flow velocities, and carbon dioxide partial pressures of 0.27 (40 Psia), 0.45 (65 Psia), and 0.79 NTa (115 Psia). The corrosion rates have been found to increase with an increase in the carbon dioxide partial pressure and flow velocity. The distribution of the phases is very important in horizontal multiphase flows. For the oils considered, at oil compositions from 0 to 60%, the oil/water mixture separated and a water layer flowed along the bottom of the pipe with the oil flowing above it. An increase in oil concentration up to 60% led to an increase in corrosion rates. Above an oil concentration of 60%, when the phases became well mixed with oil being the continuous phase, the corrosion rates are small. A model to predict corrosion rates has been established which relates the corrosion rate to the wall shear stress and the carbon dioxide partial pressure.

• OSTI ID: 70031
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
BRINES
CARBON DIOXIDE
CARBON STEELS
CONCENTRATION RATIO
CORROSION
CORROSIVE EFFECTS
EXPERIMENTAL DATA
FLOW RATE
IRON CARBONATES
MATHEMATICAL MODELS
MULTIPHASE FLOW
PETROLEUM
PIPELINES
PRESSURE DEPENDENCE
STRATIFICATION