A flow-induced corrosion and erosion-corrosion investigation was conducted to determine the
degradation rates and mechanisms that had been experienced in service in the pipework of an offshore
facility. The investigation reviewed the flow-induced corrosion and erosion-corrosion performance of the
carbon steel parent metal of the pipework in comparison to the heat affected zone (HAZ) and the
nickel-molybdenum weld material. The programme of experiments assessed the potential of two
corrosion inhibitors to adequately control the material degradation caused by static corrosion, flowinduced
corrosion and erosion-corrosion on the three regions. Static corrosion tests were performed
using linear polarisation in CO2 saturated conditions. Flow-induced corrosion and erosion-corrosion
experiments were conducted utilising a submerged impinging jet (SIJ) in CO2 saturated conditions at a
fluid velocity of 7m/s with sand loadings of 0mg/L and 100mg/L. The effects of flow-induced corrosion
and erosion-corrosion were studied using gravimetric techniques. Mechanisms were discussed based
upon results obtained from micro-structural studies.
Key words: erosion, corrosion, flow-induced, erosion-corrosion, nickel-molybdenum weld, submerged
impinging jet, carbon dioxide, velocity, sand, inhibitor.