Requirements for inhibition of localized corrosion

摘要

In cases of pipeline failures from internal corrosion, localized corrosion (LC) is the principal cause. Inhibition is the most common way to control corrosion in wet gas and oil production lines. Therefore, the inhibitor should be able to control LC in all cases where it may occur. Inhibitor selection philosophy should be based on this requirement. Laboratory and field evaluation of corrosion inhibitors showed that some products were almost 100 efficient in preventing LC if their concentration in the water phase was above a threshold value. The major uncertainty was the inhibitor availability at the surface.