Cathodic Protection
Recertification Exam

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 3 months from their certification date. If it has been more than six months since your certificate expired, you are not eligible for this program. You must instead take the CP course 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: How to sign up:
  • 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
  • First: Click HERE to purchase the exam and to register for the course.
  • Second: Submit pdf copies of 3 recent cp 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.
  • STI will send you username/password to access exam &  resource materials on our website. 


60 Day Policy

Our policy for taking the STI Recertification exam online is that you complete the process within 60 days. If you pass the 60 days and still wish to take your exam online, you will need to pay a $150.00 processing fee. 


Test Copies:

  • Submit three test copies by e-mail in PDF form to:, cc: 
  • 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.
  • Unapproved test copies: Participants may receive a full refund minus $75.00 administrative fee.
  • After receiving the approval email notification, login with your assigned password to take the exam HERE.


View 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


This is a view of how you can expect to be tested for Part 2 of the exam, which is the practical test for a sti-P3® tank.
Click here to view the sample.

Exam Questions

  • The written exam consists of 40-45 multiple choice questions. Passing grade is 75% for the written exam.
  • The practical exams are interactive tests that describe various scenarios and ask you to conduct “testing” at a site.
  • Practical exam is pass/fail.  Student must demonstrate that 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).


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.


Questions / Contact:

  • For registration questions please contact Tiffany Multra or call 224-286-6321.