(Click Category to List Courses)

16 - CHM - Chemical and Process Engineering

CHM 302A - Cathodic Protection System Operation and Maintenance

Code Start Date Duration Venue
CHM 302A 20 November 2023 5 Days Istanbul Registration Form Link
CHM 302A 11 December 2023 5 Days Istanbul Registration Form Link
Please contact us for fees


Course Description

Cathodic protection system retrofits become necessary as the pipeline systems age. An important aspect of such retrofitting is the determination of when such action should take place. Assessment of cathodic protection systems on pipelines is normally performed based on potential measurements. As galvanic anodes waste, their size decreases; and this causes a resistance increase and a corresponding decrease in polarization. Anodes’ depletion is time dependent in the model.

Course Objectives

  • Drawing a simple model of a Cathodic Protection cell and name the different elements 
  • Naming 2 types of Cathodic Protection Systems 
  • Explaining the relationship between Coatings and Cathodic protection 
  • Naming and describing 2 different testing methods used to test Cathodic Protection 
  • Understanding terminology commonly used when discussing Cathodic Protection

Who Should Attend?

  • Designers and anyone who are interested in cathodic protection technology for corrosion prevent
  • Facility owners and users who are concerned with corrosion
  • Technicians and maintenance personnel
  • Engineers and technologists

Course Details/Schedule

Day 1

  • Primer on Chemistry and Metallurgy
  • Basic Theory of Cathodic Protection
  • Electromotive force series 
  • Effect of concentration on potential: the Nernst equation 
  • Effect of temperature on potential 
  • Common reference electrodes used in Cathodic protection 
  • Converting measured potentials between different reference electrodes 
  • Potential measuring instrument
  • Corrosion cell components 
  • Converting corrosion current to corrosion weight or thickness loss: Faradays’ law 

Day 2

  • Nature of Corrosion
  • Factors Affecting Corrosion
  • Cathodic Protection Principle
  • Cathodic Protection Methods
  • Pipeline Coatings
  • Sacrificial Anode Cathodic Protection
  • Impressed Current Cathodic Protection (ICCP)
  • Isolating Joints vs Grounding Cell
  • Cathodic Protection Criteria
  • Coating and Cathodic Protection

Day 3

  • Interference from other CP installations
  • Effectiveness of coatings
  • Coatings specification 
  • Coatings inspection
  • Coating failures and analysis
  • Reference Electrodes
  • IR drop and IR Drop Free Measurement 
  • Soil Resistivity test instruments
  • Wall thickness and pit gages
  • Resistance of ground connection

Day 4

  • Non-uniform electrolyte
  • Ground Bed Design
  • Design Philosophy
  • Standards and design CODES
  • DIN Standards
  • Design Conditions
  • Cathodic Protection Design
  • Pipeline Cathodic Protection Design
  • Tank Cathodic Protection Design
  • Heat Exchanger & Oil Well Casing Cathodic Protection
  • Current interrupters
  • Test rectifiers 
  • Holiday detectors
  • Electrical resistivity
  • Stray Current Interference
  • Stray current corrosion and electrolysis 
  • Practical stray current problems
  • Current density 

Day 5

  • Cathodic Protection Shielding
  • Cathodic Protection System maintenance
  • Current requirement estimating methods 
  • Literature sources 
  • Minimum Voltage Drop Methods 
  • Polarization test method Calculation of Cathodic protection circuit resistance 
  • Pipeline Coating Survey
  • Concrete cathodic protection
  • In Line Inspection, Corrosion monitoring
  • Overview of NACE Standard on “Pipeline External Corrosion Direct Assessment Methodology”
  • Corrosion Inhibitors
  • Scale Inhibitors
  • Biocides