Malaibari, Zuhair Omar2022-05-182022-05-186059https://drepo.sdl.edu.sa/handle/20.500.14154/869Inhibition of atmospheric corrosion of mild steel in the Arabian Gulf region was investigated in this study. After searching the literature and the market ten chemicals were obtained to be tested by electrochemical techniques in a simulated solution of 2% NaCl and 1% Na2SO4 in the laboratory as corrosion inhibitors of mild steel. Among the chemicals screened sodium dihydrogen orthophosphate, dicyclohexylamine nitrite and sodium benzoate were selected for further investigation under atmospheric and accelerated laboratory conditions. Application conditions of the selected inhibitors, such as the temperature of steel specimens before immersion in the inhibitor solution and concentration of the inhibitor solution were also investigated by electrochemical techniques in the simulated solution. The three inhibitors at the determined conditions were evaluated under atmospheric conditions by weight loss measurements and electrochemical techniques in the simulated solution. The three inhibitors were also evaluated in the laboratory under accelerated and wet-dry conditions using electrochemical techniques. Morphological and compositional changes on the surfaces of selected steel specimens during atmospheric exposure were analyzed by photography, SEM and EDS techniques. (Abstract shortened by UMI.)enThesis