Assessment of corrosion in low carbon steel tubes of shiraz refinery air coolers

Lower quality and higher density crudes which contain higher sulfur, acids and other impurities have increased corrosion failures in petrochemical plants. This research describes the results of the testing and identifies the origin of the corrosion damage of air-cooler tubes of Shiraz oil refinery. Results of the tests show that the presence of daily varied corrosive agents (insoluble salt, chlorides, sulfidic compounds) in the crude oil mixed to corrode and chocke the tubes.