Common types of corrosion at the top of atmospheric pressure towers

2026-06-26View Original

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The types of corrosion present in the atmospheric and vacuum distillation systems include HCl-H2S-H2O corrosion, NH4Cl salt corrosion, NH4HS salt corrosion, corrosion caused by small organic acids, and calcium and magnesium carbonate deposition. Among these, the most common forms of corrosion are HCl-H2S-H2O corrosion and NH4Cl salt corrosion. The vapor partial pressures of H2S and NH3 at the top of the tower are low, and generally the conditions for the deposition of NH4HS are not met; therefore, salt corrosion caused by NH4HS only needs to be taken into consideration appropriately.

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Common types of corrosion at the top of atmospheric pressure towers

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