1 Scope
This document specifies performance requirements for cathodic protection of steel
in cement-based concrete, in both new and existing structures. It covers building
and civil engineering structures, including carbon steel reinforcement and prestressed
reinforcement embedded in the concrete. It is applicable to uncoated steel reinforcement
and to organic-coated steel reinforcement. It is not applicable to reinforced concrete
containing electrically conductive fibres (e.g. carbon or steel).
This document applies to steel embedded in atmospherically exposed, buried, immersed
and tidal elements of buildings or structures.
This document is only applicable to the applications of cathodic protection to steel
in concrete which are designed with the intention to, and can be demonstrated to,
meet the criteria of protection specified in 8.6. This requires the provision of sufficient performance monitoring systems as specified
in 6.3 to all parts of the structure intended to be protected, in order to assess the extent
to which the criteria in 8.6 are met.
This document does not apply to galvanic anodes or systems applied into patch repairs
to reduce the effects of ‘incipient anodes’. This document does also not apply to
any form of cathodic protection systems or other electrochemical treatments that either
cannot meet the requirements of 8.6 or are not provided with the performance monitoring systems (see 6.3) that are necessary to assess whether the criteria of protection specified in 8.6 are met.
NOTE 1
Annex A gives guidance on the principles of cathodic protection and its application to steel
in concrete.
NOTE 2 This document, while not specifically intended to address cathodic protection of steel
in any electrolyte except concrete, can be applied to cathodic protection of steel
in other cementitious materials such as are found, for example, in early 20th century steel-framed masonry, brick and terracotta clad buildings. In such applications,
additional considerations specific to these structures are required in respect of
design, materials and installation of cathodic protection; however, the requirements
of this document can be applied to these systems.