Advanced Cathodic Protection
London, Houston and Dubai
Mobility Oil & Gas (UK) Limited

Course Objectives
To provide an in-depth technical knowledge of Cathodic protection methodology
To understand Cathodic protection system design and the associated parameters
To understand Principles of Corrosion and Corrosion Control
Monitoring and Management of CP protected structures

Course Content

Fundamentals of Metallurgy
– Material Selection
– Material/Fluid compatibility
– Topside/ Subsea Materials
Fundamentals of Corrosion
Electrochemical reaction/ series
Types of Corrosion
– General or uniform corrosion
– Localised corrosion
Galvanic corrosion
Pitting corrosion
Crevice corrosion
Corrosion control and prevention methods
Selection and testing of inhibitors
Inhibitor Availability & Inhibitor Efficiency

Case study 1 & 2

Introduction to Cathodic Protection (CP)
Principles of Cathodic Protection
Criteria for Cathodic Protection
Impressed versus Sacrificial
Sacrificial Anode Cathodic Protection (SACP)
– Requirements for SACP
– Anode materials
Impressed Current Cathodic Protection (ICCP)
– ICCP anodes
– Power sources
– Electrical connections
Cathodic protection system design
– Anode resistances
– Coating breakdown factor
– Current densities
Effect of temperature on CP design
Review of DNV RP B401
CP design calculations
Case study 3& 4 - Team exercise

Cathodic disbonding and blistering

Corrosion Monitoring and Management
CP and concrete
Cathodic protection of steel in concrete
Ground bed design (Impressed system)
Current drain test
Sacrificial anode system in soil
Calcareous films
Case studies 5 & 6
Underground pipelines
Cathodic Protection of underground pipelines
Potential decay along pipeline
CP marine platforms
Reference potential devices
CP Potential distribution
Current interrupters
Test rectifiers

Holiday detectors

Stray Current Corrosion and prevention methods
Sources of Stray Current
Effects of Stray Current on metallic structures
Mitigation of interference effects
Coating Selection
Pipeline Coatings
Characteristics of Pipeline Coatings
Types of Pipeline Coatings
Case studies 7 & 8
Specification and Inspection (Industry standard review)
Coating failures
Field Joint Coatings and applications
Factory- applied vs. Field- applied

Cathodic Protection and Coatings

Pipeline Inspection: Survey methods and Evaluation techniques
Overview of NACE Standard on “Pipeline External Corrosion Direct Assessment Methodology”
Long range ultrasonic testing (LRUT)
Advantages and Limitations of LRUT
Conventional UT vs. LRUT
Case studies 5 & 6
Introduction to CPCM technology
Conventional current measuring methods vs. CPCM
Overview of course
End of course Exam (optional)