Effect of contents oil temperature and flow rate in the electrochemical corrosion of the AISI-SAE1020-steel

[摘要] Primary causes of corrosion in components and equipment used in the petroleum industry are due to the density differences present in the multiphase system Water/Hydrocarbon/CO2as well as the presence of weak particles of carbonic acid. The present research is focus on the study of the corrosion rate of the steel AISI-SAE 1020 under a saturated CO2multiphase system. The effects of fluid speed, temperature and oil content on the steel corrosion were carried out in an electrode of rotator cylinder and also using electrochemical impedance spectroscopy, and potentiodynamic polarization measurements. The results show that the effect of oil content in the rate of steel corrosion is inversely proportional with the speed of the rotor. Our observations indicate that increasing the rotor speed in systems containing 60% oil or higher produce a simultaneous increase in the degradation rate of materials. Similarly, temperatures higher than 60°C generate layers of siderite that reduce the electrochemical effect.

[发布机构] Universidad Pedagógica y Tecnológica de Colombia (UPTC), Tunja, Colombia^1

[效力级别] 化学

[关键词] Carbonic acids;Degradation rate;Density difference;Electrochemical effects;Multi phase systems;Oil contents;Oil temperature;Potentiodynamic polarization measurements