Steel pipe corrosion under flow conditions-III. Effect of sulphate ion

Comparison of the Rotating Cylinder and Pipe Flow Tests for Flow-Sensitive Carbon Dioxide Corrosion

“…(3) The corrosion current is shown on the left and the corresponding corrosion rate on the right side (for iron dissolution, the relation 1 mm/y = 1.155 A/m 2 was used). The corrosion rates at static conditions were approximately the same for all three pH values, as were the corrosion potentials ( Figure 12).…”

“…This meant that successful transfer of data from one laboratory system to another and, further, to the field was possible only via a model describing the processes occurring. Therefore, the fruitless literature search for a single scaling flow parameter (Reynolds number, 3 shear stress, 4-5 turbulence, 2 etc.) that would capture the effect of flow on corrosion had little chance of success.…”

Hydrodynamics of disturbed flow and erosion—corrosion. Part I — Single‐phase flow study

“…rupting or thinning a protective film of corrosion products. Different flow parameters have been used in the past to correlate the flow and the metal loss rate, including: velocity (Copson 1960), Reynolds number (Mahato et al, 1968;Shemilt et al, 1980) and wall shear stress (Efird, 1977;Silverman, 1984). In more recent studies (Blatf and Heitz, 1990;Neiii and Postlethwaite, 1990) the local near-wall turbulence has been proposed as a key factor.…”

“…Turbulent fluctuations interfere with the formation of protective films and also affect the rate of mass transfer of corrosion reactants through the liquid boundary layer. For example when the reduction of dissolved oxygen is the cathodic reaction, the process of corrosion is mass transfer controlled (Shemilt, 1980). Following Loss and Heitz (1973, we can adopt the concept of a double layer resistance to mass transfer, consisting of the resistance in the protective corrosion film on the metal surface and the resistance in the fluid boundary layer.…”