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Steel Pipe Native Potentials In Soils Affect CP Criteria

机译:土壤中钢管自然势影响CP标准

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摘要

Soil resistivity, corrosivity and steel native potentials in soils are interrelated. A chart was developed in this work to quantitatively map the rule-of-thumb relationship between steel native or rest potentials and soil resistivity. This chart was validated with available literature data from independent sources and can be used to provide a rough estimate of the magnitude of polarization applied on buried steel pipes for a given soil resistivity and an off-potential measured. Polarization provides a more direct measure (than an off-potential) on the magnitude of corrosion rate reduction. The chart shows that meeting the -850 my -750 mV and -650 mV (vs. Cu/CuSO4) off-potential criteria for soil resistivity ranges of, respectively, <10K, 10K-100K and >100K ohm.cm would - in general - yield at least 100 mV cathodic polarization.
机译:土壤中的土壤电阻率,腐蚀性和钢固有电位是相互关联的。在这项工作中开发了一个图表,用于定量绘制钢固有或静止电位与土壤电阻率之间的经验法则关系。该图表已使用来自独立来源的可用文献数据进行了验证,并且可以用于针对给定的土壤电阻率和测得的偏电势粗略估计应用于埋地钢管的极化幅度。极化为腐蚀速率降低的幅度提供了更直接的度量(而不是电位)。图表显示,对于<10K,10K-100K和> 100K ohm.cm的土壤电阻率范围,分别满足-850 my -750 mV和-650 mV(vs. Cu / CuSO4)的反电势标准-一般-产生至少100 mV的阴极极化。

著录项

  • 来源
    《Pipeline & gas journal》 |2012年第3期|p.52545658|共4页
  • 作者

    F.M. Song; H.Yu;

  • 作者单位

    Southwest Research Institute®, San Antonio, TX;

    Southwest Research Institute®, San Antonio, TX;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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