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The cathodic protection potential criteria: Evaluation of the evidence
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-09-28 , DOI: 10.1002/maco.202011978 Chris Googan 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-09-28 , DOI: 10.1002/maco.202011978 Chris Googan 1
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Recent publications have ascribed the mechanism of cathodic protection (CP) in soils to the development of passivity at the steel surface. This view has, in turn, prompted discussion on the need to re‐evaluate the long‐established criteria for protection. This paper presents a contribution to that discussion. It advances, or rather it restates, the proposition that neither immunity nor passivity is necessarily relevant. It argues that protection is simply a consequence of a potential‐driven lowering of the anodic dissolution rate. However, it also emerges that elucidating any mechanism convincingly requires dependable field or laboratory data on the very low corrosion rates occurring on cathodically polarised specimens. A critical review of published data highlights a lack of reliability in this area.
中文翻译：
阴极保护的潜在标准：证据评估
最近的出版物将土壤中的阴极保护（CP）机理归因于钢表面钝化的发展。反过来，这种观点促使人们对是否需要重新评估已建立的保护标准进行了讨论。本文为该讨论做出了贡献。它提出了或者说是重申了这样的主张，即免疫力和消极性都没有必要。它认为，保护仅仅是由于潜在驱动的阳极溶出度降低的结果。然而，还发现，阐明任何机理都令人信服地需要可靠的现场或实验室数据，以证明在阴极极化样品上发生的腐蚀速率非常低。对已发布数据的严格审查表明，该领域缺乏可靠性。
更新日期：2020-09-28
中文翻译：
阴极保护的潜在标准：证据评估
最近的出版物将土壤中的阴极保护（CP）机理归因于钢表面钝化的发展。反过来，这种观点促使人们对是否需要重新评估已建立的保护标准进行了讨论。本文为该讨论做出了贡献。它提出了或者说是重申了这样的主张，即免疫力和消极性都没有必要。它认为，保护仅仅是由于潜在驱动的阳极溶出度降低的结果。然而，还发现，阐明任何机理都令人信服地需要可靠的现场或实验室数据，以证明在阴极极化样品上发生的腐蚀速率非常低。对已发布数据的严格审查表明，该领域缺乏可靠性。
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