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A STUDY ON THE ADSORPTION BEHAVIOR OFTHIO-PHOSPHATE INHIBITOR ON THE METAL SURFACE |
Yufang Zhang;MinXV Lu;Yahong Zhu |
中国石油天然气集团公司石油管力学与环境行为重点实验室 |
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Abstract The inhibition performance and adsorption mechanism of thio -phosphate inhibitor on the carbon steel surface in high temperature na phthenic acid/white oil solution has been studied with chemical、SEM and X-ray analysis methods.It is shown that,in naphthenic acid / white oil solution,thio - phosphate can be adsorbed on the metal surface by both reacting sediment and mol ecules adsorbing cover .At the lower inhibitor concentration,the surface film is formed by reacting sediment type,but at higher concentration,it will be formed by adsorbing cover type.When the concentration is 1000 mg/L,the inhibition effic iency of thio -phosphate will be upon 94%.
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Received: 20 February 2001
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Corresponding Authors:
Yufang Zhang
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[1]ErnestoBF .Experiencewithnaphthenicacidcorrosioninrefinerydistil lationprocessunits[A].NACEconferencecorrosion/83[C].1983,99 [2]ElizabethBK .Naphthenicacidcorrosionliteraturesurvey[A].NACEConferenceCorrosion/99[C].1999,378 [3]BrianEH .Naphthenicacidcorrosionbyvenezuelancrudes[A].NACEConferenceCorrosion/97[C].1997,502 |
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