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Investigation of processes occurring at cathodically protected underground installations: Experimental study of pH alteration and mathematical modeling of oxygen transport in soil

机译:研究受阴极保护的地下设施中发生的过程:pH值变化的实验研究和土壤中氧迁移的数学模型

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摘要

A detailed analysis of the complex processes occurring at the surface of cathodically protected underground metal installations is presented. In the first part an alteration of soil pH in vicinity of cathodically polarized buried specimen of carbon-steel pipe is investigated experimentally. In the second part a stationary two-phase oxygen transport to a defect in the protective coating of an underground pipe is studied by mathematical modeling and protection current solely given by oxygen reduction are calculated. This information is crucial to an evaluation of subsequent processes taking place at a protected metal surface, which is part of a follow-up study. (C) 2016 Elsevier Ltd. All rights reserved.
机译:给出了对受阴极保护的地下金属装置表面发生的复杂过程的详细分析。在第一部分中,通过实验研究了碳钢管阴极极化埋藏标本附近土壤pH的变化。在第二部分中,通过数学模型研究了固定的两相氧向地下管道保护层中缺陷的输运,并计算了仅由氧还原给出的保护电流。此信息对于评估在受保护的金属表面上进行的后续过程至关重要,这是后续研究的一部分。 (C)2016 Elsevier Ltd.保留所有权利。

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