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腐蚀科学与防护技术 2004
CORROSION FAILURE ANALYSIS OF AN OIL TUBE USED IN NATURAL GAS WELL
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Abstract:
A failed oil tube used in natural gas well was examined by optical microscope,scanning electron microscope ,X-ray diffractometer and X-ray spectrometer.Corrosion behavior of 35CrMo steel samples of the oil tube was also investigated by means of salt spray tests in laboratory.The results show that CO_2 and H_2O are primary factors in the corrosion of oil tube.The corrosion product is FeCO_3,non-metallic inclusions in the steel and erosion of natural gas fluid played an important role in accelerating the corrosion.
