@article{Alsultani_Mutasher_2021, title={Corrosion Behavior in External Surface of API 5L X52 Underground Pipelines in Buzurgan Region/ Missan province}, volume={11}, url={https://jprs.gov.iq/index.php/jprs/article/view/428}, DOI={10.52716/jprs.v11i1.428}, abstractNote={<p>External corrosion of underground pipeline is one of the most common damage mechanisms<br>associated with the soil environment particularly in ageing pipelines. This study investigates<br>the external corrosion phenomenon for exporting crude oil pipeline (28’’) in Buzurgan region /<br>Missan province. Corrosion rate was measured by using weight loss method, and Tafel<br>extrapolation. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS)<br>were also used in this work. During the field survey, soil sample was taken from Buzurgan<br>region (collected as close as possible to buried pipes at 1.2 m) for tests were carried out for soil<br>that included: pH, moisture content, resistivity and chemical composition (XRF, XRD, and<br>soluble salts). It was found that the environment of the areahas a low soil resistivity value<br>(870) ohm.cm. On other hand, the samples that were immersed in Buzurgan soil showed the<br>that highest damage was by pitting corrosion due to the high soluble salts content particularly<br>chlorides (7388 )ppm and sulfates (2570) ppm.</p>}, number={1}, journal={Journal of Petroleum Research and Studies}, author={Alsultani, Dr. Kadhim F. and Mutasher, Zahraa Qasim}, year={2021}, month={Mar.}, pages={36-52} }