Cathodic Protection Certification

The Cathodic Protection Certification is a free intermediate-level, 20-minute skill test from Science of Apps. It tests cathodic protection knowledge — corrosion fundamentals, galvanic and impressed current CP systems, testing, surveys and protection criteria, and design, interference and safety — written to AMPP cathodic protection certification topics (CP1 to CP4), AMPP SP21424 (formerly NACE SP0169) and US 49 CFR 192 pipeline rules for 2026. Score 70% or more on its 20 questions to earn a verifiable Cathodic Protection Proficiency certificate (SOA-CPX). Every question is based on published standards and research — including AMPP cathodic protection certifications (CP1 Tester to CP4 Specialist) and CP standards such as SP21424 (formerly SP0169) (AMPP), 49 CFR Part 192 Transportation of natural and other gas by pipeline (eCFR (US DOT PHMSA)) — and each answer is explained with its source.

Science of Apps offers a free Cathodic Protection Certification, updated for 2026 and 2027. It measures corrosion fundamentals, CP systems, testing, surveys and criteria and design, interference and safety and gives instant results with a shareable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Cathodic Protection Proficiency certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: AMPP cathodic protection certifications (CP1 Tester to CP4 Specialist) and CP standards such as SP21424 (formerly SP0169) (AMPP); 49 CFR Part 192 Transportation of natural and other gas by pipeline (eCFR (US DOT PHMSA)). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Corrosion Fundamentals (Corrosion cells, Electrochemistry and Environments); CP Systems (Galvanic anodes, Impressed current and Components); Testing, Surveys and Criteria (Potentials and IR drop, Surveys and Regulations); Design, Interference and Safety (Current requirements, Interference and Electrical safety). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Cathodic protection tester or technician, Corrosion engineer, Pipeline integrity engineer, Utility or terminal maintenance technician and Coatings and corrosion inspector. It suits anyone who wants a quick, verifiable way to show Cathodic Protection knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

AMPP (formerly NACE and SSPC) offers a ladder of CP certifications — CP1 Cathodic Protection Tester, CP2 Technician, CP3 Technologist and CP4 Specialist — each with training and an exam, and experience requirements at higher levels.

For buried or submerged steel, a common criterion is a polarised (instant-off) structure-to-electrolyte potential of −850 mV or more negative relative to a copper/copper sulfate reference electrode. A minimum 100 mV of cathodic polarisation is an alternative criterion.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.