Corrosion Experiments were carried out under iron carbonate scale-forming conditions in a large diameter, multiphase flow system. Both oil/water and oil/water/gas slug flows were studied at pressures up to 0.79 MPa and temperatures of 60 °C and 80 °C. It was found that with increasing iron concentration, the corrosion rates were reduced to negligible values in oil/water flows. However, significant corrosion was seen in slug flow with clear evidence of damage to the corrosion product layer due to impact and possible collapse of gas bubbles and a considerable reduction in the layer thickness. Details of corrosion rates and corrosion coupon surface analysis are presented.

Subject
Films, Water, Piping, Froude number, Corrosion rate, Metal surfaces, Slug flow, Dissolved iron, Partial pressures, Corrosion products, Film formation, Pressure, Corrosion coupons
Keywords:
Scaling conditions, corrosion product layer, multiphase slug flow, carbon dioxide, sweet corrosion
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1999
Association for Materials Protection and Performance (AMPP)
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