Corrosion condition of the naphtha cooler tube bundle in petrochemical hydrogenation units
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The image below shows the corrosion of the tube bundle in the naphtha cooler of a petrochemical hydrogenation unit, taken after acid cleaning. The structural type is vertical, with the specification being BJS600-4.0-90-6/25-2. The tube bundle is made of 10# steel, and the operating medium is naphtha outside the tube bundle. Temperature 120 degrees, pressure 2.6 MPa. The inner wall of the tube bundle is: the operating medium is the circulating water inside the tube bundle. Temperature 30 degrees, pressure 0.4 MPa. This tube bundle has been in use for nearly 2 years, and corrosion has occurred on the inner and outer wall surfaces of the heat exchange tubes; the form of this corrosion is mainly pitting corrosion. It is recommended that for such tube bundles, anti-corrosion coating can be used as a solution.
After being in use for nearly 2 years, the tube bundle of the naphtha cooler developed pitting corrosion. Coating for corrosion protection can be considered to address this type of corrosion. .
Corrosion condition of the naphtha cooler tube bundle in petrochemical hydrogenation units
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