New to cathodic protection
Start with the basic concepts that explain why CP readings and criteria matter.
Cathodic protection learning for field work and study
Learn cathodic protection through formulas, field examples, technical guides, and certification-style practice.
CathodicAcademy organizes CP measurements, criteria, calculations, survey methods, system behavior, and troubleshooting into practical learning paths. Start where you are: beginner concepts, certification study, field testing, formulas, or data interpretation.
Choose your starting point
Where should I start?
Studying for Certification
Focus CP 1 through CP 4 study pages, then use practice questions and quizzes to check weak spots.
Need a Formula
Use CP formulas for resistance, current, anode output, and field calculations.
Doing Field Testing
Use field guides for survey setup, walk-down methods, and common mistakes.
Interpreting Measurements
Understand what a reading means, what caused a condition, and what can make it misleading.
Practice Questions and Quizzes
Use skills practice and interactive quizzes to review and test understanding.
Why CP systems can be hard to manage
Everything has to balance.
Cathodic protection depends on a balance between current output, coating condition, soil or electrolyte resistance, shielding, interference, and measured potentials. A reading may look good or bad because of more than one factor, so field interpretation has to connect the measurement to the system condition.
Start here
Start Here
New to CP? These pages explain the basic ideas before the field terms become confusing.
What Is Cathodic Protection?
Basic definition and purpose.
Corrosion Fundamentals
Why corrosion happens.
How CP Works
How CP reduces corrosion.
CP System Components
Main parts of CP systems.
CP Criteria
How protection is judged.
Learn CP Home
Full beginner guide library.
Start for potentials and criteria
Field measurements, criteria, formulas, and standards-aware explanations in one place.
Use this area to connect CP readings, test setup, current interruption, IR drop, and reference electrode placement. Readings are easier to understand when the measurement method, formula, and criterion are studied together.
Field measurement help
Field Measurement Help
Use these pages when you need to understand what a CP reading means and what can make it misleading.
Measurements Home
Measurement topic hub.
Structure-to-Electrolyte Potential
Basic CP voltage reading.
Reference Electrode Use
How readings are made.
Instant-Off Potential
Interrupted reading concept.
Current Interruption
How interruption supports readings.
IR Drop
Why voltage error occurs.
Depolarization Testing
Polarization decay testing.
Shunts
Measuring current from millivolts.
Survey methods
Survey Methods
Use these guides for field procedures, setup choices, and common survey interpretation problems.
Survey Methods Home
Survey method hub.
Pipe-to-Soil Potential Survey
Common field survey.
Close-Interval Survey
Detailed pipeline survey.
DCVG
Coating defect survey.
ACVG
Coating defect survey.
CP Coupons
Coupon-based evaluation.
Rectifier Inspection
Rectifier field inspection.
Soil Resistivity Testing
Soil testing method.
Troubleshooting and interference
Troubleshooting and Interference
Start here when readings are unstable, current is coming from outside sources, or isolation and bonding may be involved.
Interference Home
Interference topic hub.
DC Stray Current
DC current from outside sources.
AC Interference
AC voltage and current effects.
AC Mitigation
Reducing AC risk.
Telluric Current
Natural earth-current effects.
Interference Testing
How interference is evaluated.
Bonds
Controlled electrical connections.
Casing Testing
Casing-related field checks.
Formula and tool support
Formula and Tool Support
Use these pages when you need the equation, the units, and a practical field example.
Formula Index
Formula hub.
Ohm's Law
Voltage, current, and resistance.
Shunt Current
Current from mV across a shunt.
Rectifier Output
Rectifier power and current support.
Current Density
Current per area.
Current Requirement
Current needed for protection.
Soil Resistivity
Wenner-style soil calculation.
Reference Electrode Conversion
Convert reference scales.
Study and practice
Study and Practice
Use these pages to study CP levels, review calculations, and check your understanding.
Practice Home
Practice question library.
Interactive Quizzes
Interactive quiz hub.
CP Certification Study Guide
Certification hub.
CP 1
CP 1 study guide.
CP 2
CP 2 study guide.
CP 3
CP 3 study guide.
CP 4
CP 4 study guide.
CP Calculations Practice
Calculation practice.
Site support
More Site Resources
Use these support pages when you need asset topics, standards context, definitions, or site information.
Applications
CP by asset type.
Standards Context
Standards learning support.
References and Standards
Reference support.
Glossary
CP term definitions.
Site Map
Complete site listing.
About
About this learning site.
Contact
Contact CathodicAcademy.
Explore the platform
Major knowledge areas
Resources
Common practice references, standards context, formula support, glossary terms, applications, and study tools for CP students and technicians.
Measurements
Cathodic protection measurements including structure-to-electrolyte potentials, instant-off potentials, IR drop, reference electrodes, and current measurement.
Equipment
Cathodic protection equipment guides.
Survey Methods
Cathodic protection survey methods including pipe-to-soil surveys, DCVG, ACVG, coupons, current requirement testing, and field inspection.
Systems
Cathodic protection systems built from rectifiers, groundbeds, anode beds, current distribution, attenuation, troubleshooting, and remote monitoring.
Interference
Cathodic protection interference help covering DC stray current, AC interference, telluric current, AC mitigation, bonds, isolation, and safety considerations.
CP Certification Study Guide
Cathodic protection certification study paths for CP 1, CP 2, CP 3, and CP 4 levels with links to guides, formulas, practice questions, and quizzes.
Glossary
Glossary of CP glossary terms for corrosion cells, polarization, criteria, equipment, reference electrodes, and troubleshooting.
Applications
Asset-specific CP guides for pipelines, facility piping, tanks, marine structures, reinforced concrete, UST systems, and related systems.
Educational and standards disclaimer
CathodicAcademy is an educational study resource. It does not replace official standards, regulations, owner requirements, project specifications, or qualified professional judgment.