The Development And Application On Corrosion Inhibitor Of Naphthenic Acid

With the increase of the concentration of naphthenic acid in the oil, the corrosion of naphthenic acid becomes worse and worse to the equipments. The text is about the synthesis and the estimate of the inhibitor. The medium of corrosion was No. 2 vacuum cut from Zhonghai Asphaltum Stock Company. The corrosion inhibition performance in the medium was evaluated by using static coupon weight loss method. The method of orthogonal design of experiment was applied to synthesize several inhibitors to optimize the synthetic conditions. The tests developed tris (4-acetamide phenyl) phosphate and its production by cooperation, tris (4-amino phenyl) phosphate and its production by cooperation, the transformed inhibitor. The test result showed that the two inhibitors had good capability among these. The inhibiting rate of the two was higher than 85%(such as the production of tris (4-acetamide phenyl) phosphate by cooperation and the transformed inhibitor). The single factor analytical method was applied to discuss the trend of the inhibiting rate. Finally, the Gas Chromatogram-mass Spectrum was applied to prove the synthesis of inhibitor. The comparative study of corrosion inhibitive effect showed that its production by cooperation was better than the original production, the inhibitor before hydrolyzation was better than that after hydrolyzation, the transformed inhibitor was better than the original inhibitor.