Effect of Fluid Velocity on Pitting

The effect of fluid velocity on the corrosion of several commercial materials in seawater is shown in Fig. 7.31 (Ref 51). Three generalized types of materials are indicated by the corrosion behavior. The copper-base alloys, cast iron, and carbon steels tend to progressively increase in corrosion rate with increasing velocity. This is consistent with the schematic representation shown in Fig. 4.10, where the limiting current density for diffusion control of the cathodic reaction increases with 

Nickel-Chromium-High Molybdenum Alloys Titanium 

70/30 Copper-Nickel Alloy (0.5 Fe) 90/10 Copper-Nickel Alloy (1.5 Fe) Aluminum Brass Admiralty Copper 

Nickel-Copper Alloy 400 Type 316 Nickel-Chromium Allays Type 304 

Effect of seawater velocity on corrosion mode of a range of commercial alloys. Source Ref 51 

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