Fundamentals of Cathodic Protection (Above-Ground Storage Tanks) Training (Based on API RP 651 – Cathodic Protection of Above-Ground Storage Tank Bottoms)

  • Online (Microsoft Teams)
  • +971 562069465
  • info@velosiaims.com
Course Overview

  • This course introduces the fundamentals of cathodic protection (CP) as applied to above-ground storage tank bottoms, in alignment with API RP 651. It explains why tank bottoms corrode and how CP systems reduce corrosion by controlling electrochemical reactions. Participants learn basic CP concepts, including galvanic and impressed current systems, and how these systems are typically designed and installed for storage tanks. The course also highlights the interaction between coatings, soil conditions, and CP performance.

    Practical guidance is provided on CP monitoring, structure-to-soil potential measurements, and recognizing signs of under-protection or over-protection. Integration of CP data with inspection and integrity management activities, including API 653 tank inspections, is emphasized. By the end of the course, participants gain a clear understanding of the CP system's purpose, limitations, monitoring requirements, and how effective CP contributes to extended tank bottom life and improved asset reliability.

Learning Objectives

  • By the end of this course, participants should be able to:

    1. Understand why tank bottoms corrode and how CP mitigates it
    2. Explain basic cathodic protection principles in simple terms
    3. Identify CP systems used for above-ground storage tanks
    4. Understand API RP 651 requirements and recommendations
    5. Perform basic CP monitoring and interpretation
    6. Recognize common CP problems and failure indicators
Mode of Delivery

  • Training will be conducted via Microsoft Team Meeting. Meeting invites will be shared one day before the first day of training. 

    Face-to-face training is available as per request.

Training Timings

  • 02 days of training from 09:00 AM to 03:00 PM GST (UAE Time)

Materials Provided
    • Presentation Slides
    • Study References
Certificate

  • Upon successful completion of training, participants will receive a "Fundamentals of Cathodic Protection (Above-Ground Storage Tanks)" training course completion certificate.

Who Should Attend

  • Who should attend?

    This course is appropriate for a wide range of professionals, but not limited to:

    • Corrosion and integrity engineers (junior–mid level)
    • Tank inspectors (API 653 candidates)
    • Maintenance and reliability engineers
    • QA/QC and inspection personnel
    • Operations staff involved in tank integrity
How can we help you?

Contact us at the Velosi office nearest to you or submit a business inquiry online.

contact us

Fees + VAT as applicablee

Tax Registration Number: 100442245500003

(including coffee breaks and a buffet lunch daily)

Discount Plans

Course Outline

Day 01

  • CP Fundamentals & Tank Bottom Corrosion

    Session 1 – Introduction to Tank Bottom Corrosion

    Objective: Understand the problem CP is meant to solve.

    • Why do tank bottoms corrode

    • External vs internal bottom corrosion

    • Role of:

      • Soil

      • Moisture

      • Oxygen

      • Bacteria

    • Corrosion cells under tank bottoms

    • Consequences of bottom failure

    • Relationship between CP, coatings, and inspection (API 653 link)

    Session 2 – Basic Principles of Cathodic Protection

    Objective: Build a simple, solid CP foundation.

    • What is cathodic protection?

    • Anode, cathode, electrolyte (simple explanation)

    • How CP reduces corrosion rate

    • Types of CP systems:

      • Galvanic (sacrificial) anodes

      • Impressed current systems

    • When each system is used for tanks

    Session 3 – CP Systems for Above-Ground Tanks (API RP 651)

    Objective: Understand how CP is applied to tank bottoms.

    • API RP 651 scope and intent

    • CP system layouts for tank bottoms:

      • Distributed anodes

      • Ring anodes

      • Deep anode systems (overview)

    • New tanks vs existing tanks

    • Integration with:

      • Bottom plates

      • Sand pads

      • Liners

    Session 4 – Design Concepts & Installation Awareness

    Objective: Recognize good vs poor CP installation.

    • Basic design considerations:

      • Tank size

      • Soil resistivity

      • Current demand (conceptual)

    • Electrical continuity requirements

    • Typical installation mistakes:

      • Poor anode placement

      • Inadequate isolation

    • Safety considerations during CP installation

Day 02

  • Monitoring, Inspection & Practical Application

    Session 1 – CP Criteria & Performance Monitoring

    Objective: Know when CP is “working.”

    • CP protection criteria (conceptual)

    • Structure-to-soil potential measurements

    • Reference electrodes (Cu/CuSO₄)

    • On-potential vs off-potential (awareness)

    • Frequency of CP monitoring per API RP 651

    Session 2– CP Inspection & Troubleshooting

    Objective: Identify problems early.

    • Common CP system problems:

      • Under-protection

      • Over-protection

      • Loss of continuity

    • Indicators of ineffective CP

    • Simple troubleshooting steps

    • Interaction between CP and coating condition

    Session 3 – CP, Inspection & API 653 Integration

    Objective: Connect CP to tank inspection decisions.

    • How CP data supports:

      • Tank bottom inspection

      • RBI decisions

    • CP influence on:

      • Corrosion rate

      • Remaining life

    • When CP issues trigger inspection or repair

    • Inspector responsibilities vs corrosion engineer responsibilities

    Session 4 – Case Studies & Field Scenarios

    Objective: Apply CP fundamentals in real situations.

    • Case study 1:

      • Bottom corrosion despite the CP system

    • Final recap & Q&A

     

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