Abstract
The effect of fluid velocity on the corrosion rate of low carbon steel in inhibited 4M HCl at 80°C has been examined. When the inhibitor film fully covers the metal surface, the corrosion rate slightly increases with increasing flow velocity which can be attributed to a partial erosion of the inhibitor film. When the inhibitor film coverage is in the lower range, the corrosion takes place at the diffusion limit and an increase in flow velocity results in a strong decrease in corrosion rate due to an increased rate of mass transport of the corrosion inhibitor to the metal surface.
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