For cathodic protection testers currently certified by STI or NACE International

The easy-to-follow, interactive exam is available to cathodic protection testers currently certified by STI or NACE International. All testers must provide proof of active engagement in the field of cathodic protection monitoring. In addition, cathodic protection testers whose STI certifications have expired will be permitted to recertify under this program for up to 90-day from their certification date. If it has been more than three months since your certificate expired, you are not eligible for this program. You must instead take the Cathodic Protection Class again. This recertification program allows existing STI CP certified testers to take an online exam to renew their certification. The cost for this program is $495.

Who Qualifies

  • Cathodic protection testers currently certified by STI or NACE International
  • Must be actively testing since being certified
  • Must have understanding of current STI RP for cathodic protection testing, R051

How to Sign Up

  1. Submit PDF copies of 3 recent cathodic protection tests for approval. One must be Galvanic and one ICCP. These test reports should reflect at least STI R051 minimum standards, last updated April 2017. The review turnaround time could take up to a week.
  2. Once approved, STI/SPFA staff will send a link to register for the exam and recertification course.
  3. You must complete the exam within 24 hours with a passing grade of 80% or greater.

90 Day Policy

Our policy is that you must complete the entire process, including submitting 3 reports for approval and taking the STI Recertification exam online within 90 days after your CP expiration date.

Test Copies

  • Submit three test copies.
  • One must be Galvanic and one ICCP, including site maps. Criteria for passing or failing systems needs to be reported.
  • Whether or not your state or other AHJ form requires the continuity testing, we need to be able to see that this required component of ICCP continuity testing is being performed correctly. ICCP results should also have rectifier data.
  • Test copies must be approved before access to the exam is permitted.
  • Once approved, STI/SPFA staff will send a link to register for the exam and recertification course.

Exam Questions

  • The written exam consists of 21 multiple choice questions. A passing grade is 75% for the written exam.
  • The practical exams simulate in-field testing by describing various scenarios and asking you to interpret the “site testing”.
  • A passing grade is 80% for the practical exam.  Students must demonstrate they can test both galvanic and ICCS and interpret the results.
  • All answers can be found in STI posted reference materials.
  • All testing MUST be done in accordance with STI recommended practices.
  • Answers to exam should be per federal regulations, not individual state requirements.
  • The exam is open book. Students are on their honor to complete the exam on their own, without help of any other person(s).

Sample Exam

The exam consists of three parts:

  1. Written exam
  2. Practical exam for a galvanic (sti-P3®) system
  3. Practical exam for an Impressed Current Cathodic Protection System

Time Limit

  • Once the exam is started, students will have 24 hours to complete it.
  • A clock with time remaining to take the exam will appear on every page of the exam.
  • No refunds will be issued for exams that have expired.


  • STI Cathodic Protection Certification is valid for three years.
  • At the end of this period, the tester must again demonstrate that they are knowledgeable in current testing methods and criteria.
  • STI reserves the right to withdraw anyone’s certification at any time if it is determined that their conduct is unethical (as related to cp testing).

Failed Tests

  • Individuals that fail the exam must attend an actual class, and pass that exam, in order to maintain their certifications.
  • No refunds will be issued for failed tests.


Please contact Tiffany Multra or call 224-286-6321 with any questions regarding registration.