Cathodic Protection

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Guides

Title	Open
Cathodic Protection Certification Levels (CP1–CP4) \| AMPP Overview Compare AMPP/NACE cathodic protection certification levels from CP1 to CP4. Understand who each level is for, typical prerequisites, exam format, and a practical roadmap for progressing through CP testing, troubleshooting, and design.	Open
Concept Bridge Series: CP3 Foundations	Open
CP1 Cathodic Protection Tester Certification CP1 (Cathodic Protection Tester) explains what the certification covers, who it’s for, how the theory vs practical exams work, and what to study first to pass confidently.	Open
CP2 Cathodic Protection Technician Certification CP2 (Cathodic Protection Technician) covers troubleshooting, data interpretation, interference awareness, and intermediate field evaluation. Understand exam structure, prerequisites, and how to prepare effectively.	Open
CP3 Cathodic Protection Technologist Certification CP3 (Cathodic Protection Technologist) validates advanced troubleshooting, interference evaluation, and CP design calculations. Understand exam structure, case-based reasoning, and how to prepare effectively.	Open
CP4 Cathodic Protection Specialist Certification CP4 (Cathodic Protection Specialist) represents the highest level of CP certification. This guide explains system design responsibility, advanced calculations, case-based exam structure, and how to prepare effectively.	Open
Current Distribution and Attenuation Explained: Why Protection Is Never Uniform	Open
From Driving Voltage to Polarization: How CP Actually Works	Open
Understanding Corrosion Using Mixed Potential Theory	Open
Why Instant-Off Matters: Separating Polarization from IR Drop	Open

Articles

Title	Open
Common CP 3 Calculation Types Explained	Open
Activation vs Concentration Polarization	Open
CP 3 Exam Breakdown: Theory vs Case-Based	Open
Polarization in Cathodic Protection: What It Means and How to Interpret It	Open
CP 3 – Cathodic Protection Technologist Certification Overview	Open
AMPP vs NACE: What Changed and What It Means for CP Professionals	Open
What Is AMPP? (Association for Materials Protection and Performance)	Open
CP 2 – Cathodic Protection Technician Certification Overview	Open
CP 1 – Cathodic Protection Tester Certification Overview	Open
CP 4 – Cathodic Protection Specialist Certification Overview	Open
Cathodic Protection Explained: Principles, Design, Testing, and Standards	Open
What Is Cathodic Protection?	Open
Cathodic Protection Career and Salary Outlook (CP1–CP4)	Open
AMPP Cathodic Protection Certification Levels Explained (CP1 vs CP2 vs CP3 vs CP4)	Open

Formulas

Title	Open
Anode System Life Calculations (Capacity vs Consumption Rate)	Open
Attenuation (Cathodic Protection Current Decay)	Open
Cathodic Protection Current Requirement Calculations	Open
Coating Conductance and Specific Coating Resistance	Open
Meter Loading Diagnostics	Open
Reference Electrode Conversions and Temperature Corrections	Open

Glossary

Title	Open
A/m² (Amps per Square Meter)	Open
AC (Alternating Current)	Open
AC Corrosion	Open
AC Current Density	Open
AC Interference	Open
AC Mitigation	Open
AC Mitigation System	Open
Activation Polarization	Open
ACVG (Alternating Current Voltage Gradient)	Open
Ag/AgCl (Silver/Silver Chloride)	Open
Amp (Ampere)	Open
Amperage	Open
AMPP	Open
Anion	Open
Anode	Open
Anode Bed	Open
Anode Depolarization	Open
Anode Life	Open
Anode Polarization	Open
Anode Spacing	Open
Anodic Dissolution	Open
AST (Aboveground Storage Tank)	Open
Atom	Open
Attenuation	Open
Backfill	Open
Bond Test	Open
Bond Tester	Open
Bonding	Open
Buried Reference Cell	Open
Capacitive Coupling	Open
Cathode	Open
Cathode Depolarization	Open
Cathode Polarization	Open
Cathodic	Open
Cathodic Protection	Open
Cation	Open
Characteristic Resistance	Open
CIPS (Close Interval Potential Survey)	Open
CIS (Close Interval Survey)	Open
Clamp-On Ammeter	Open
Close-Interval Survey	Open
Coating	Open
Coating Breakdown Factor	Open
Coating Conductance	Open
Coating Holiday	Open
Concentration Polarization	Open
Conductive Coupling	Open
Copper/Copper Sulfate Electrode	Open
Corrosion Cell	Open
Coupon	Open
Coupon Monitoring	Open
CP (Cathodic Protection)	Open
Crevice Corrosion	Open
CSE (Copper/Copper Sulfate Electrode)	Open
Cu/CuSO₄ (Copper/Copper Sulfate)	Open
Current	Open
Current Density	Open
Current Discharge Point	Open
Current Distribution	Open
Current Interruption	Open
Current Mapping	Open
Current Pickup Point	Open
Current Requirement	Open
Data Logger	Open
DC (Direct Current)	Open
DCVG (Direct Current Voltage Gradient)	Open
Decade	Open
Decoupling Device	Open
Deep Anode Groundbed	Open
Depolarization	Open
Depolarization Test	Open
Design Current Density	Open
Digital Recorder	Open
Diode	Open
Directional Current Measurement	Open
Drainage Bond	Open
Driving Voltage	Open
DVM (Digital Voltmeter)	Open
Electrochemical	Open
Electromagnetic (Inductive) Coupling	Open
Electron	Open
Electrostatic (Capacitive) Coupling	Open
EMI (Electromagnetic Interference)	Open
Equilibrium Potential	Open
Erosion-Corrosion	Open
Evans Diagram	Open
Fault Current	Open
Four-Pin Method	Open
Galvanic Anode System	Open
Galvanic Series	Open
GCP (Galvanic Cathodic Protection)	Open
Gradient Control Mat	Open
Grounding System	Open
High-Input Impedance Voltmeter	Open
HPD (High Point Drain)	Open
HV (High Voltage)	Open
Hydrogen Evolution	Open
ICCP (Impressed Current Cathodic Protection)	Open
Impressed Current System	Open
Induced AC Voltage	Open
Inductive Coupling	Open
Instant-Off Potential	Open
Instant-Off Reading	Open
Interfered-with Structure	Open
Interference	Open
Interference Bond	Open
Interference Test	Open
Interrupter	Open
Ion	Open
IR (Current × Resistance)	Open
IR Drop	Open
Isolating Fitting	Open
Isolation Flange Kit	Open
Isolation Transformer	Open
Kinetic	Open
Leakage Current	Open
Localized Attack	Open
LPD (Low Point Drain)	Open
LV (Low Voltage)	Open
mA (Milliampere)	Open
Mass Change	Open
Metallic Shield	Open
Metal–Electrolyte Interface	Open
Mitigation Bond	Open
Mixed Potential Theory	Open
Multimeter	Open
Multiple Anode System	Open
mV (Millivolt)	Open
NACE	Open
Native Potential	Open
Nernst Equation	Open
OCP (Open Circuit Potential)	Open
OFF (Instant-Off Potential)	Open
OIL-RIG (Oxidation Is Loss, Reduction Is Gain)	Open
ON (On Potential)	Open
ON Reading	Open
Over-Voltage Protector	Open
Overpotential	Open
Overprotection	Open
Oxidation	Open
Oxygen Reduction	Open
P/S (Pipe-to-Soil)	Open
PCM (Pipeline Current Mapper)	Open
Pitting Corrosion	Open
Polarization	Open
Polarization Curve	Open
Polarization Shift	Open
Portable Reference Cell	Open
Potential	Open
Pourbaix Diagram	Open
Protective Criteria	Open
PRT (Product Recovery Tank)	Open
Rail Transit Stray Current	Open
Rectifier	Open
Rectifier Bridge	Open
Rectifier Output Measurement	Open
Reduction	Open
Reference Electrode	Open
Reference Electrode Placement	Open
Remote Monitoring Unit	Open
Resistance	Open
Reverse Current Switch	Open
RMS (Root Mean Square)	Open
RMU (Remote Monitoring Unit)	Open
ROW (Right-of-Way)	Open
Sacrificial Anode	Open
SCAT (Self Contained Aboveground Tank)	Open
SCE (Saturated Calomel Electrode)	Open
Series-Parallel Circuit	Open
Shallow Anode Groundbed	Open
SHE (Standard Hydrogen Electrode)	Open
Shielding	Open
Shunt	Open
Shunt Measurement	Open
Siemens	Open
Silver/Silver Chloride Electrode	Open
Soil Resistivity Meter	Open
Soil Resistivity Test	Open
Species	Open
SSPC	Open
Step Voltage	Open
Stray Current	Open
Stray Current Corrosion	Open
Stray Current Discharge Location	Open
Stray Current Pick-Up Location	Open
Structure	Open
Structure Depolarization	Open
Structure-to-Structure Interference	Open
Surge Arrestor	Open
T/R (Transformer Rectifier)	Open
Test Interruption	Open
Test Station	Open
Total Current Requirement	Open
Touch Voltage	Open
Transport	Open
True RMS Meter	Open
Underprotection	Open
UST (Underground Storage Tank)	Open
Voltage	Open
Voltage Drop	Open
Voltage Gradient	Open
Voltage Gradient Survey	Open
ZRE (Zinc Reference Electrode)	Open

Standard

Title	Open
100 mV Polarization Criterion Explained	Open
Instant Off Potential Explained in Plain English	Open
IR Drop in Cathodic Protection Explained	Open
Pipe-to-Soil Potential Explained	Open
Polarization Shift Explained	Open
Reference Electrode Placement Explained	Open
Remote Earth Explained	Open
Structure-to-Electrolyte Potential Explained	Open
−850 mV Criterion Explained	Open

Simulator

Title	Open
Simulator 3 — Pipe-to-Soil Potential Field Simulator — Coating Holiday (CP Applied)	Open