CP 4 - Cathodic Protection Specialist

Cathodic Protection Specialist

CP4 - Cathodic Protection Specialist

The CP4 - Cathodic Protection Specialist certification covers the theoretical concepts behind the design and considerations that influence the design and calculations (including attenuation) of a cathodic protection system.

This certification is targeted at individuals who are responsible for the design, installation, and maintenance of cathodic protection systems.

Prior to taking the exam or the NACE training course, applicants must have completed college or university-level courses in algebra, geometry, and trigonometry, and must have significant amounts of practical experience in cathodic protection.

Certification candidates have four (4) years to complete all requirements, including a successful completion of the exam, and an approved application with the required work experience and education requirements.

Apply for Certification

Steps to certification

Primary certification path

  1. Work experience and education requirements

    Bachelor's degree in physical sciences or engineering

    6 years of verifiable work experience in advanced Cathodic Protection, including 4 years in responsible charge**

    ** Responsible charge refers to work experience that is at a level of responsibility requiring initiative, technical ability, and independent judgement.

  2. Course requirements and suggestions

    NACE CP 4-Cathodic Protection Specialist Course - Strongly Recommended

    Successful completion of the Ethics for the Corrosion Professional course or an equivalent training

  3. Certification and application requirements

    Approved CP4 - Cathodic Protection Specialist Application

  4. Core exam requirements

    Certification Exam – CP4 - Cathodic Protection Specialist Case-Based Exam

    Case-Based Exam Preparation Guide

    Certification Exam – CP4 - Cathodic Protection Specialist Theory Exam

    Theory Exam Preparation Guide

    Note: These exams will be available in English and Spanish at select Pearson VUE testing centers globally during two specified times per year. The upcoming available times are:

    • August 2-8, 2021 (registration opens March 8, 2021)
    • February 7-14, 2022
    • August 1-8, 2022

    Please note that the current exam may be taken until March 7, 2021

Apply for Certification


  1. Work experience and education requirements

    2 years post high school training from math or science technical/trade school

    12 years of verifiable work experience in advanced Cathodic Protection, including 4 years in responsible charge**

    ** Responsible charge refers to work experience that is at a level of responsibility requiring initiative, technical ability, and independent judgement.

  2. Course requirements and suggestions

    NACE CP 4-Cathodic Protection Specialist Course - Strongly Recommended

  3. Certification and application requirements

    Approved CP4 - Cathodic Protection Specialist Application

  4. Core exam requirements

    Certification Exam – CP4 - Cathodic Protection Specialist Case-Based Exam

    Case-Based Exam Preparation Guide

    Certification Exam – CP4 - Cathodic Protection Specialist Theory Exam

    Theory Exam Preparation Guide

    Note: These exams will be available in English and Spanish at select Pearson VUE testing centers globally during two specified times per year. The upcoming available times are:

    • August 2-8, 2021 (registration opens March 8, 2021)
    • February 7-14, 2022
    • August 1-8, 2022

    Please note that the current exam may be taken until March 7, 2021

Apply for Certification
  1. Work experience and education requirements

    One of the following:

    Bachelor’s degree in either physical science or engineering and an advanced physical degree in physical sciences or engineering that required an exam

    Engineering-in-Training registration or equivalent

    Professional engineer’s license

    AND

    4 years of verifiable work experience in advanced Cathodic Protection, including 4 years in responsible charge**

    ** Responsible charge refers to work experience that is at a level of responsibility requiring initiative, technical ability, and independent judgement.

  2. Course requirements and suggestions

    NACE CP 4-Cathodic Protection Specialist Course - Strongly Recommended

  3. Certification and application requirements

    Approved CP4 - Cathodic Protection Specialist Application

  4. Core exam requirements

    Certification Exam – CP4 - Cathodic Protection Specialist Case-Based Exam

    Case-Based Exam Preparation Guide

    Certification Exam – CP4 - Cathodic Protection Specialist Theory Exam

    Theory Exam Preparation Guide

    Note: These exams will be available in English and Spanish at select Pearson VUE testing centers globally during two specified times per year. The upcoming available times are:

    • August 2-8, 2021 (registration opens March 8, 2021)
    • February 7-14, 2022
    • August 1-8, 2022

    Please note that the current exam may be taken until March 7, 2021

Apply for Certification

Certification Exams

NII certification requirements include case-based and theory exams delivered via computer-based testing (CBT).

The multiple-choice CBT exam is scheduled separately from the course and delivered via Pearson VUE. A voucher needed to schedule the CBT exam is included as part of your initial course registration.

Renewal requirements

An approved recertification application is required every 3 years. The work experience requirement for renewals for all certifications is one and half (1.5) years for the most recent three (3) year period. Additionally, some certifications have other requirements related to responsibility in charge.

As you prepare for renewal, please visit My Certification Portal to log and manage your work experience and Professional Development Hours (PDH's) needed. Your work experience and PDH's will be submitted as part of your renewal application but you can input PDH's at any time. See the certification renewal guide for PDH's requirements, our sample training PDH guide, and our PDH how-to videos.

Certification holders are required to pay a non-refundable processing fee for renewal.

NOTE: NACE reserves the right to return any incomplete applications or those that do not meet the requirements. All application fees are non-refundable. To avoid processing delays or forfeiture of fees, please ensure that the application is complete, meets all the requirements and payment has been received.