Cathodic Protection Design for Steel in Concrete Structures

Module D5 - Requirements for Cathodic Protection

Welcome to Module D5 of the Fundamentals of Design for Cathodic Protection of Steel in Concrete Structures.

Even the most advanced power supply or high-grade anode material will fail if the surrounding environment isn’t properly configured. To stop rust permanently, a cathodic protection (CP) system requires a completely unobstructed path to deliver ionic current through the concrete matrix directly to the steel reinforcement.

Whether you are safeguarding an exposed coastal bridge or a buried marine foundation, successful electrochemical design always comes down to four non-negotiable, foundational rules:

  • Conductive Electrolyte: Ensuring concrete pore water, soil, or water provides an uninterrupted pathway for chemical ions to transport ionic current.


  • Electrical Continuity: Verifying all embedded metallic elements are electrically continuous to completely eliminate aggressive stray current corrosion.


  • Anode-to-Cathode Isolation: Securing physical separation between the anode and cathode to prevent metallic short circuits that cause system failure and render monitoring impossible.


  • Continuous Energy Supply: Maintaining a steady flow of electrons via self-powered galvanic chemistry or external ICCP units to drive protection

What You Will Learn

  • Ionic Current Flow Mechanisms: Master how protective current distributes via migrating ions (Cl-, OH-, Na+, K+) within the concrete pore water electrolyte to establish steel polarisation.


  • Environmental Exposure Variables: Evaluate how environmental factors and different exposure conditions (atmospheric, buried, and immersed) alter the path of ionic current and system design. 


  • Stray Current Corrosion Mitigation: Diagnose why electrically discontinuous reinforcement triggers localised metal dissolution and rapid stray current corrosion, and learn how to resolve it with electrical continuity bonding.


  • Anode-to-Cathode Short Circuit Elimination: Identify why direct metallic contact between the anode assembly and embedded steel causes system failure and renders performance monitoring impossible.


  • Ancillary Metallic Element Management: Formulate engineering strategies to isolate, remove, or encapsulate structural bearings, fixing bolts, and cable trays to prevent stray current corrosion and unintended current drain.


  • Electrochemical Failure Mode Analysis: Contrast the operational consequences of physical anode-to-steel short circuits within Impressed Current Cathodic Protection (ICCP) systems versus galvanic anode setups.


  • System Compliance & Monitoring Frameworks: Align your field testing, reference electrode placement and design parameters with the strict international metrics specified in global benchmarks like the BS EN ISO 12696 standard.

Who This Course Is For

This module scales fluidly to meet you at your current level of experience, whether you need foundational basics or strict engineering guidelines.

  • Junior Engineers & Field Techs: Industry newcomers who need to understand how concrete defects physically block protective current and how to perform baseline testing for critical electrical continuity.


  • Project Leads & Design Consultants: Engineers moving past temporary patching who must plan pre-commissioning requirements, map out continuity testing zones, and identify risks of aggressive stray current.


  • Senior Specialists & Technical Directors: Experienced practitioners validating complex electrical continuity frameworks, mitigating stray current interference, auditing compliance against BS EN ISO 12696, and aligning with ISO 15257.


  • Asset Owners & Infrastructure Managers: Stakeholders managing civil assets who need to evaluate how coatings, waterproofing, or discontinuous reinforcement impact long-term system suitability, stray current safety, and return on investment (ROI).

Course Delivery & Requirements

To maintain strict compliance and ensure professional-level mastery, this course utilises an integrated learning framework:

  • On-Demand Video Lessons: Step-by-step video lectures explaining complex electrochemical cell mechanics and ionic circuit pathways.


  • Comprehensive Downloads: Complete access to downloadable slides (PDF) and the module overview (PDF) for offline reference.


  • Direct Expert Q&A: Submit technical questions directly through the online learning platform to John Paul Segers (MSc, CEng, FICorr, FIMMM, BS EN ISO 15257 Level 5 CP Expert).


  • Progression Gate: Learners must complete all video lessons, review all documentation, and pass the integrated assessment before unlocking subsequent modules.


  • 100% Mastery Criteria: Achieving a perfect score of 100% on the final 17-question module quiz is required to proceed.


  • Members have access to the On-Demand Video Lessons and Quiz for 1 year from the date of registration, and complete access to downloadable slides (PDF) and the module overview (PDF) for offline reference.

Course Structure and Content

This element of the course has been extracted from the complete Fundamentals of Design for Cathodic Protection of Steel in Concrete Structures course as follows:

    1. Welcome and Course Overview - Video

    2. Purchasing Cathodic Protection Standards - Video

    1. Module D5 - Requirements for Cathodic Protection - Overview

    2. Module D5 - Requirements for Cathodic Protection - Video

    3. Module D5 - Requirements for Cathodic Protection - Slides

    4. Module D5 - Requirements for Cathodic Protection - Quiz

About this course

  • £95.00
  • 6 lessons
  • 0.5 hours of video content

Module D5 - Learning Outcomes

At the end of this module, you will have developed an understanding of:

  • Cathodic protection requirements.
  • Electrolyte requirements for atmospherically exposed structures.
  • Electrolyte requirements for buried or immersed exposed structures.
  • Reinforcement electrical continuity factors – stray current corrosion.
  • Electrical continuity requirements for cathodic protection.
  • Anode to cathode isolation factors.
  • Anode to cathode short circuit effects of impressed current and galvanic anode cathodic protection.
  • Requirements for ancillary metal work in structures receiving cathodic protection.
  • Cathodic protection energy requirements and factors to consider.


Module Quiz

At the end of this module, there is a quiz consisting of 17 questions that are aimed at reinforcing the learning and knowledge you have gained from attending this module. 

Frequently Asked Questions (FAQ)

  • How do concrete cracks or old repairs impact cathodic protection current?

    Physical cracks or non-conductive repair patches, like old epoxy mortar, act as electrical blockades. They prevent the ionic current from flowing through the concrete pore water from the anode to the cathode, leaving portions of the steel completely unprotected and vulnerable to rust.

  • What exactly is stray current corrosion and how do we prevent it?

    If a piece of steel reinforcement within the system's area of influence is discontinuous (not in metallic contact), current discharges off its surface into the concrete to find the nearest path home. This sudden change from electron flow to ionic flow causes severe, accelerated corrosion at the point of discharge. It is prevented by testing and installing electrical continuity bonding wires across all isolated steel elements.

  • Why is a metallic short circuit considered a total system failure?

    According to BS EN ISO 12696, a system must allow for performance monitoring via negative potential shifts and hydroxide production. When an anode directly touches the steel (via a tie wire, for example), current takes the path of least resistance as pure electron flow rather than ionic current. This completely stops the protective chemical reaction on the steel and makes the zone impossible to monitor.

  • How do short circuits behave differently in ICCP versus galvanic systems?

    In an ICCP system, the positive potential of the anode can actually accelerate the corrosion of nearby shorted steel due to bi-metallic action. In a galvanic system, a short circuit shifts the local steel potential more negatively, slowing corrosion down slightly, but still ruins the system by making it impossible to disconnect components for regulatory compliance monitoring.

Module D5 - Requirements for Cathodic Protection

Module D5 is the sixth of ten modules which form the complete Fundamentals of Design for Cathodic Protection of Steel in Concrete Structures course.

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Continue with your Learning and Personal Development

Individual modules do NOT provide CPD hours. To unlock your 50-Hour Certified CPD Certificate, you must complete all 10 modules.

Module D5 is the sixth of ten modules which form the complete Fundamentals of Design for Cathodic Protection of Steel in Concrete Structures course.

Completion of all modules of the full Fundamentals of Design for Cathodic Protection of Steel in Concrete Structures course provides you with a Continued Professional Development (CPD) completion certificate worth 50 hours.

I encourage you to continue with your learning and personal development to help identify that corrosion management can be used as an effective tool to support sustainable and low-carbon development now and in the future.