ISO 18086:2019 - Corrosion of metals and alloys. Determination of AC corrosion. Protection criteria

ISO 18086:2019

Corrosion of metals and alloys. Determination of AC corrosion. Protection criteria

Status : Current   Published : December 2019

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PDF

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HARDCOPY



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).




Standard NumberISO 18086:2019
TitleCorrosion of metals and alloys. Determination of AC corrosion. Protection criteria
StatusCurrent
Publication Date10 December 2019
Normative References(Required to achieve compliance to this standard)ISO 8044, IEC 61010-1, ISO 15589-1, EN 50443
Informative References(Provided for Information)EN 15257, EN 13509, IEC 60050-826
Draft Superseded ByISO/DIS 18086
ICS77.060
Title in FrenchCorrosion des métaux et alliages — Détermination de la corrosion occasionnée par les courants alternatifs — Critères de protection
CommitteeISE/NFE/8
PublisherISO
FormatA4
DeliveryYes
Pages46
File Size2.01 MB
Price£127.00


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