Open AccessCorrosion Behavior in External Surface of API 5L X52 Underground Pipelines in Buzurgan Region/ Missan province
Author(s) -
Kadhim F. Al-Sultani,
Zahraa Qasim Mutasher
Publication year - 2021
Publication title -
mağallaẗ al-buḥūṯ wa-al-dirāsāt al-nafṭiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2710-1096
pISSN - 2220-5381
DOI - 10.52716/jprs.v11i1.428
Subject(s) - corrosion , water content , soil test , scanning electron microscope , energy dispersive x ray spectroscopy , materials science , pipeline transport , moisture , metallurgy , soil water , environmental science , mineralogy , composite material , geology , environmental engineering , geotechnical engineering , soil science
External corrosion of underground pipeline is one of the most common damage mechanismsassociated with the soil environment particularly in ageing pipelines. This study investigatesthe external corrosion phenomenon for exporting crude oil pipeline (28'') in Buzurgan region /Missan province. Corrosion rate was measured by using weight loss method, and Tafelextrapolation. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS)were also used in this work. During the field survey, soil sample was taken from Buzurganregion (collected as close as possible to buried pipes at 1.2 m) for tests were carried out for soilthat included: pH, moisture content, resistivity and chemical composition (XRF, XRD, andsoluble salts). It was found that the environment of the areahas a low soil resistivity value(870) ohm.cm. On other hand, the samples that were immersed in Buzurgan soil showed thethat highest damage was by pitting corrosion due to the high soluble salts content particularlychlorides (7388 )ppm and sulfates (2570) ppm.