Module D2 - Cathodic Protection Design Requirements & BS EN ISO 12696

Welcome to Module D2! 

Now that you have completed your pre-design diagnostics in Module D1, we are ready to move from structural investigation to engineering execution.

In this module, you will learn how to interpret and apply the primary international performance standard, BS EN ISO 12696, to verify safe, compliant, and long-lasting cathodic protection (CP) systems for reinforced concrete structures.

What is the primary standard for cathodic protection of steel in concrete?

The primary international performance standard is BS EN ISO 12696. It establishes the precise quality management, design criteria, component requirements, and installation compliance benchmarks needed to control corrosion in both new and existing reinforced concrete buildings and civil structures.

Key Learning Objectives & Compliance Criteria

1. Performance Standards vs. Design Codes

  • Understand the Performance Framework: Learn to navigate BS EN ISO 12696 as a performance standard, which establishes mandatory minimum criteria and legal constraints but does not prescribe specific design methods, calculations, or formulas.


  • Engineering Flexibility: Discover how a performance-based approach grants you the engineering freedom to select your own design methodologies, provided your final system fully satisfies the standard's compliance benchmarks.



2. Personnel Competency & Quality Compliance

  • Enforce Verification Protocols: Master the mandatory requirement that every individual stage of a CP design must be formally documented, cross-checked, and approved by competent personnel prior to final submission.


  • Competency Benchmarks: Align your project teams with the personnel qualification requirements referenced in BS EN ISO 15257.



3. Compliance Thresholds for System Components

  • Enforce Current Density Limits: Apply mandatory performance caps for embedded anodes to prevent concrete acidification and long-term degradation. For MMO-coated titanium, ensure your design limits the maximum short-term surface current density to 220 mA/m² and the long-term density to 110 mA/m².


  • Specify Component Redundancy: Implement standard-mandated safety margins, including a minimum of 2 permanent reference electrodes per anode zone and a minimum of 2 negative steel connections to ensure redundancy.



4. Electrical and Cable Infrastructure Limits

  • Verify Cable Capacity: Ensure your selected electrical wiring is rated to carry 125% of the calculated design current.


  • Enforce Uniform Current Distribution: Verify that total voltage drops across anodes, distributors, and cables do not cause current variations to exceed the strict 10% allowable limit across any single anode zone.


  • Isolate System Voltages: Ensure your DC power supplies are restricted to 24V DC for any anode configurations lacking physical barriers, preventing accidental shock hazards.



5. Installation, Isolation, and Repair Frameworks

  • Enforce Strict Zone Isolation: Implement mandatory field-testing procedures to verify total electrical isolation between individual anode zones and local reinforcement steel, mitigating short-circuit risks.


  • Integrate Repair Standards: Align all localised structural patch repairs with BS EN 1504 to establish a chemically compatible, uninterrupted path for continuous CP current flow.



6. Navigating Informative Guidance Flowcharts

  • Concept CP Design Checklist (Section B.2): Review the standard's baseline assessment criteria for analysing concrete cover, chloride depth, carbonation profiling, parent concrete resistivity, and future equipment access.


  • Detailed CP Design Elements (Section B.3): Identify the core parameters that your chosen design methods must account for, such as total steel surface areas, cathode current demands, anode current capacities, and system voltage drops.

Who will benefit from this course?

This training is designed specifically for civil engineers, structural consultants, asset managers, and corrosion specialists who need to design carbon emission-reducing, low-carbon infrastructure life extension solutions.

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

    Module I - Welcome and Course Overview

    • Welcome and Course Overview - Video

    • Purchasing Cathodic Protection Standards - Video
  • 2

    Module D2 - Introduction to Design Requirements

    • Module D2 - Introduction to Design Requirements - Overview

    • Module D2 - Introduction to Design Requirements - Video

    • Module D2 - Introduction to Design Requirements - Slides

    • Module D2 - Introduction to Design Requirements - Quiz

Module D2 - Learning Outcomes

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

  • BS EN ISO 12696 design requirements for cathodic protection – Section 1 - Scope.
  • BS EN ISO 12696 design requirements for cathodic protection – Section 4 - Quality Management.
  • BS EN ISO 12696 design requirements for cathodic protection – Section 4 - Personnel.
  • Design competence – course disclaimer and student responsibility. 
  • BS EN ISO 12696 design requirements for cathodic protection – Section 4 - Design. 
  • BS EN ISO 12696 design requirements for cathodic protection – Section 6 Cathodic Protection System Components.
  • BS EN ISO 12696 design requirements for cathodic protection – Section 7 Installation Procedures.
  • BS EN ISO 12696 design informative guidance – Section B.2 Concept Cathodic Protection Design Process.
  • BS EN ISO 12696 design informative guidance – Section B.3 Detailed Cathodic Protection Design Process.


Module Quiz

At the end of this module, there is a quiz consisting of 13 questions that are aimed at reinforcing the learning and knowledge you have gained from attending this module. 

Module D2 - Introduction to Design Requirements

Module D2 is the second of nine 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

Module D2 is the second of nine 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.