Abstract
Corrosion causes of distillation column were studied using mass loss technique and surface morphology investigations as a function of temperature and time. Local and visual examinations were carried out to estimate the damages. Special autoclave apparatus was designed to simulate the real operating conditions and to obtain the corrosion rate data, while scanning electron microscopy and X-ray diffraction were used for surface morphology. Kinetics and mathematical modeling were also applied to correlate the results. It was found that corrosion rate of carbon steel alloy was increased with the increasing temperature and time. Surface morphology supported the mass loss data, and the damage of steel surface was higher at sever operating conditions. Most of corrosion problems were attributed to the presence of sulfur components in crude oil. The reaction is following the zeroth-order rates.
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