Comparative Study on Flow Accelerated Corrosion and Erosion Corrosion at a 90deg Carbon Steel Bend
Electrochemical measurements and surface analysis are performed to comparatively study flow accelerated corrosion (FAC) and erosion corrosion (E C) behavior at a 90deg carbon steel bend. The corrosion rates are higher under FAC conditions than those under E C conditions. For FAC, the corrosion is more serious at the inside wall. However, corrosion is exacerbated at the outside wall under E C conditions. No erosion scratches are observed under FAC conditions and at the inside wall under E C conditions, while remarkable erosion scratches appear at the outside wall under E C conditions. The dominant hydrodynamics affecting FAC and E C are remarkably different.
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