Differences in corrosion patterns at the top and bottom of atmospheric distillation columns in petrochemical industries
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The following images show the differences in corrosion patterns at the top and bottom of the atmospheric distillation column used in petrochemical processes; this is due to the different oil fractions and temperatures at these two locations.
In the petrochemical industry, the top and bottom of atmospheric and vacuum distillation columns exhibit different forms of corrosion due to differences in oil fractions and temperature. Generally, the temperature at the top of the tower is lower, mainly due to the erosion by acidic substances such as H2S ； The temperature at the bottom of the tower is high, which facilitates hydrogen sulfide corrosion and carbide precipitation, leading to severe corrosion damage. .