DIN EN ISO 18086:2021-02
Corrosion of metals and alloys - Determination of AC corrosion - Protection criteria (ISO 18086:2019); German version EN ISO 18086:2020
| Fecha edición: |
2021-02-01
En Vigor
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| Idiomas disponibles: | Inglés, Alemán |
| Resumen: | This document specifies protection criteria for determining the AC corrosion risk of cathodically protected pipelines. It is applicable to buried cathodically protected pipelines that are influenced by AC traction systems and/or AC power lines. In the presence of AC interference, the protection criteria given in ISO 15589-1 are not sufficient to demonstrate that the steel is being protected against corrosion. This document provides limits, measurement procedures, mitigation measures, and information to deal with long-term AC interference for AC voltages at frequencies between 16,7 Hz and 60 Hz and the evaluation of AC corrosion likelihood. This document deals with the possibility of AC corrosion of metallic pipelines due to AC interferences caused by conductive, inductive or capacitive coupling with AC power systems and the maximum tolerable limits of these interference effects. It takes into account the fact that this is a long-term effect, which occurs during normal operating conditions of the AC power system. This document does not cover the safety issues associated with AC voltages on pipelines. These are covered in national standards and regulations (see, e. g., EN 50443). |
| Keywords: | Alloys|Alternating current|Cathodic coating|Cathodic protection|Coatings|Corrosion|Corrosion probability|Corrosion protection|Corrosion resistance|Corrosion tests|Definitions|Design|Electrochemical corrosion|Erecting (construction operation)|Evaluations|Influences|Limits (mathematics)|Long-time behaviour|Materials|Materials testing|Measuring techniques|Metal pipes|Metallic materials|Metals|Monitoring|Operation|Pipe couplings|Pipelines|Pipes|Probability|Protective measures|Protective tubes|Safety|Specification (approval)|Surveillance (approval)|Testing|Underground|Underground installations |
| ICS: | 77.060 - Corrosión de metales |
| CTN: | |
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Equivalencia Internacional |
Idéntica EN ISO 18086:2020 Idéntica ISO 18086:2019 |
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Reemplazo Normas |
Reemplaza a DIN EN ISO 18086:2017-12 Reemplaza a DIN EN ISO 18086:2020-08 |
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