Abstract
This study aimed to assess the corrosivity of sabkha soil in the Jizan area, southwestern of Saudi Arabia. Jizan is located on the coast of the Red Sea and encounters several geohazards, including soil corrosivity and land subsidence due to the presence of sabkha and salt dome in the area. Twenty-five sabkha samples were collected from six locations in Jizan and analyzed for mineralogy, geochemistry, and spectra. The X-ray diffraction analysis showed that the collected samples were primarily composed of gypsum, halite, and quartz. The chemical composition of the soil samples was dominated by SiO
2
, Al
2
O
3
, Fe
2
O
3
, and Na
2
O. The SO
4
, Cl, resistivity values in the study area are 2088.4, 19,687.5 mg/kg, and 3996.3 Ω · cm, respectively. The soil corrosivity in the study area ranged from very severe for chloride to moderately to severely for pH, sulfate, and resistivity.