Corrosion Behavior of X80 Pipeline Steel in Alkaline sand Soil wtth Saturated Water
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摘要: 采用电化学测试、SEM 观察及EDS分析等方法, 研究了X80管线钢在水饱和碱性沙土中的腐蚀行为。结果表明:随着腐蚀时间的延长, X80钢腐蚀速率的变化趋势为先缓慢增大后快速增大;腐蚀50d后, 腐蚀产物中主要为铁的氧化物、铁的硫化物, 其中混杂着土壤中盐类;X80钢的耐蚀性及腐蚀形态与其表面生成的腐蚀产物膜的完整性和致密性有关。Abstract: The corrosion behavior of X80 pipeline steel was investigated in alkaline sand soil with saturated water by means of electrochemical measurement, scanning electron microscopy and energy dispersive spectrum analysis. The results show that the corrosion rate of X80 steel presented the variational trend from slow increase to rapid increase with the prolongation of corrosion time. After corrosion for 50 d, the corrosion products were the mixture of iron oxides, iron sulfides and small amount of salts in the soil. The corrosion resistance and corrosion morphology of the X80 steel were dependent on the integrality and compactness of corrosion product films.
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Keywords:
- X80 pipeline steel /
- corrosion behavior /
- alkaline sand soil /
- corrosion product
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