Cathodic protection

Cathodic protection is one of the most effective forms of external corrosion control for immersed or buried metallic materials.

Cathodic protection is frequently used as a secondary or backup system in combination with protective coatings, but also as a standalone system when operational conditions make the use of coatings unjustified or impractical.

Despite a simple and robust mechanism, the protective effects of cathodic protection are only optimal within a narrow range of design and operational parameters. Faulty design or improper operation of cathodic protection may damage equipment, protective coatings and even personnel safety.

Consequently, the area of cathodic protection is regulated and requires the expertise of specialised and suitably qualified engineers.

Cathodic protection design and troubleshooting experience

Wood’s highly experienced and certified corrosion engineers have delivered a long track record of innovative cathodic protection designs and troubleshooting, as well as retrofit cathodic protection consultancy scopes.

Wood has a team of specialist metallurgists who are experts in cathodic protection application techniques.

We understand the many factors that can impact the effectiveness of cathodic protection and consider influences such as hydrogen-induced cracking, stray current and electrolysis risks during project planning, eliminating or mitigating these risks during the design process.

We also work to ensure that protective coatings and cathodic protection work hand in hand to provide an effective response to corrosion issues.

Wood is not affiliated with any cathodic protection companies, manufacturers, suppliers or contractors, which allows us to provide unbiased and optimal solutions for our clients.

Our engineers are certified by or active members of AMPP (formerly NACE) and the ACA (Australian Corrosion Association).

Cathodic protection services

• Design and analysis of impressed current and sacrificial cathodic protection systems, including offshore and onshore metallic fixed and floating structures, pipelines, tanks, jetties, quay-walls, reinforced concrete structures and systems for Hydrogen induced stress cracking (HISC) susceptible materials (martensitic and duplex stainless steels)
• Cathodic protection inspections and surveys (including CIPS/COPS and DCVG), including onshore CP and offshore CP
• Subsea cathodic protection surveys using cell-to-cell techniques
• Corrosion potential mapping on concrete structures
• Cathodic protection modelling, including well casings potential and current density profile modeling (using wireline tool simulation software)
• Cathodic protection performance under disbonded coatings and within crevices
• Low-frequency induction (LFI)/earth potential rise (EPR) effects on onshore pipelines caused by high-voltage power lines
• Pipeline AC corrosion susceptibility
• Pipelines subject to direct electrical heating (DEH)
• Retrofitting (anode skids)
• Material procurement support and manufacturing inspection
• Cathodic protection system installation support, commissioning service and faultfinding
• Cathodic protection training courses
• CP life extension analysis
• Pipeline attenuation modelling
• Global CP analysis

Our clients for cathodic protection services include:

Codes and standards for cathodic protection

Our cathodic protection team works to the following codes, standards and accreditations:

Related keywords

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