Corrosion resistance of X80 pipeline steel in simulated solution of Geermu soil

XU Congmin; SHI Kai

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Corrosion resistance of X80 pipeline steel in simulated solution of Geermu soil

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- Corrosion resistance of X80 pipeline steel in simulated solution of Geermu soil
- CIESC Journal Issue 6, Pages: 1513-1518(2009)
- 作者机构：
  
  西安石油大学材料科学与工程学院，材料加工工程重点实验室
- 作者简介：
- 基金信息：
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- Online First：05 June 2009，
  
  Published：05 June 2009
- 稿件说明：
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XU Congmin, SHI Kai. Corrosion resistance of X80 pipeline steel in simulated solution of Geermu soil[J]. CIESC Journal, 2009, (6): 1513-1518.
DOI：

XU Congmin, SHI Kai. Corrosion resistance of X80 pipeline steel in simulated solution of Geermu soil[J]. CIESC Journal, 2009, (6): 1513-1518. DOI：

摘要

采用失重法、电化学测试、SEM及XRD微观分析等方法，研究了X80管线钢在格尔木土壤模拟溶液中的耐腐蚀性能。结果表明，在格尔木土壤模拟溶液中，随着浸泡时间的增加，X80钢平均腐蚀速率明显下降，但腐蚀趋势增加，钢基体表面由以全面腐蚀为主转为以点蚀为主;X80钢的阴极反应为氧的去极化;腐蚀产物主要由FeOOH（表层）和Fe3O4（内层）组成;X80钢的耐蚀性及腐蚀形态与各试样表面生成的腐蚀产物膜的完整性和致密性有关。研究还发现氯离子含量是影响腐蚀的主导因素。

Abstract

The corrosion resistance of X80 pipeline steel was investigated in simulated solution of Geermu soil in Qinghai province

by using mass loss method

electrochemical measurement

scanning electron microscopy and X-ray diffraction.The results showed that the average corrosion rate of X80 steel decreased obviously

but corrosion tendency increased.This was induced by the change of corrosion morphology from uniform corrosion to pitting corrosion.Cathodic reaction was dominated by oxygen depolarization reaction.The corrosion product was basically FeOOH (surface layer) and Fe3O4 (inner layer).The corrosion resistance and corrosion morphology of X80 steel samples was dependent on the integrity and compactness of corrosion product films.The content of Cl- dominated the corrosion severity.

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