# What is the FROSIO inspector certification — and what is the exam actually like?

Source: https://coatmentor.com/blog/what-is-the-frosio-exam · Updated 2026-10-01

Alongside the AMPP CIP program, **FROSIO** is one of the two coating-inspector credentials that project specifications name most often. It comes out of Norway, it dominates North Sea and offshore specifications, and — the part that surprises most candidates — its theory exam is **written, not multiple-choice**. Here's the plain-English guide.

**The short answer:** FROSIO is the Norwegian certification scheme for surface-treatment (coating) inspectors. You take an approved 80-hour course, then one exam in two parts: a four-hour written, open-answer theory paper and a four-hour practical, each passed with two thirds of the marks. Your certificate level (I, II or III) depends on documented experience, and the certificate is valid for five years.

## What FROSIO is

**FROSIO stands for Faglig Råd for Opplæring og Sertifisering av Inspektører innen Overflatebehandling** — in English, the Norwegian Professional Council for Education and Certification of Inspectors of Surface Treatment. It certifies surface-treatment (coating) inspectors under its own scheme, accredited to ISO/IEC 17024 since 2003, and a FROSIO certificate is what many European, offshore, marine and energy-sector specifications name when they call for a certified coating inspector — often side by side with, or instead of, AMPP CIP.

The path is: complete an 80-hour training course at a FROSIO-approved training body, then pass the examination at the end of it. The 80 hours come in two formats. On FROSIO's 2026 course list, most courses start with e-learning or virtual classes and finish with three to seven course days before the exam; the rest run entirely in a classroom over about two weeks. Which one you get depends on the course you book. The certificate is valid for five years and is renewable.

## The three certificate levels

Unlike CIP, FROSIO does not have separate exams per level. Everyone sits the **same course and the same exam** — your certificate level depends on the **work experience you can document**:

| Level | Experience (documented) | In practice |
| --- | --- | --- |
| **Level I** (white) | Under 2 years | Certified knowledge, building experience. |
| **Level II** (green) | 2+ years of relevant experience, short of Level III | Working inspector level. |
| **Level III** (red) | 5+ years relevant experience, incl. at least 2 as an inspector | The "red certificate" most offshore and NORSOK-world specs ask for. |

Because the exam is the same for everyone, you move from Level I to III by documenting more experience and requesting an upgrade through the FROSIO portal — you don't re-sit the exam.

## The exam: written theory + practical

This is the single most important thing to understand before you start preparing:

- **The theory exam is open-answer.** You get four hours for a paper of questions you answer *in writing* — define, explain, list, calculate. There are no options to eliminate and no partial credit for recognising a phrase. Either you can state what [ISO 8502-9](https://coatmentor.com/standards/iso-8502/) measures, in your own words, or you can't. The paper is marked out of 150 points and you need 100 to pass, two thirds. You may bring a non-programmable calculator and a paper dictionary, which the FROSIO representative checks; phones and programmable aids are not allowed.
- **The practical exam** also takes four hours. You move through a series of stations, one candidate at each, doing real inspection work: recognising coating defects and rust grades, using the instruments (DFT gauges, profile measurement, dew-point kit, [holiday detector](https://coatmentor.com/learn/holiday-testing/)) and reading them correctly. It is marked out of 48 points, with 32 to pass, again two thirds.

You must pass both. If you fail one, you re-sit only that one: a passed exam stays valid for five years. After three unsuccessful attempts, FROSIO requires a new training course.

The written format changes how you must prepare. Candidates coming from multiple-choice prep material consistently report the same shock: recognising the right answer is a much lower bar than **producing** it on paper under time pressure.

## What the syllabus leans on

FROSIO is heavily standards-driven, with an ISO/NORSOK spine rather than the SSPC-heavy framing common in US material:

- **[ISO 8501](https://coatmentor.com/standards/iso-8501/)** — rust grades (A–D) and preparation grades (Sa / St), plus welds and edges (8501-3).
- **ISO 8502** — surface cleanliness tests: [soluble salts](https://coatmentor.com/learn/soluble-salts/) by the Bresle method (8502-6/-9), dust (8502-3), climate (8502-4).
- **[ISO 8503](https://coatmentor.com/standards/iso-8503/)** — surface profile: comparators, stylus and replica-tape methods.
- **[ISO 12944](https://coatmentor.com/standards/iso-12944/)** — corrosivity categories (C1–C5 plus CX), durability ranges, paint systems, offshore (Part 9).
- **NORSOK M-501** — the offshore surface-treatment spec, with its coating systems and climate stop rules.
- Plus corrosion theory, coating types and curing mechanisms, application methods and defects, inspection instruments and reporting, health & safety, and the classic **calculation questions** (volume solids → WFT/DFT, spreading rate, loss factor).

For the calculations, we've worked a full example step by step in [the FROSIO calculation guide](https://coatmentor.com/blog/frosio-written-calculation-worked).

## FROSIO vs AMPP CIP — quick comparison

|  | FROSIO | AMPP CIP |
| --- | --- | --- |
| Origin / stronghold | Norway; North Sea, offshore, European & marine specs | USA; global, strong in the Americas, Middle East & Asia |
| Structure | One course + one exam; level set by documented experience | Tiered courses and exams (Level 1 → 2 → 3) |
| Theory exam format | **Written / open-answer** | Multiple-choice |
| Practical part | Yes — instruments and defect recognition | A closed-book practical exam at Levels 1 and 2 |
| Standards spine | ISO + NORSOK | ASTM + SSPC/AMPP + NACE, with ISO for surface preparation |

Neither is "better" — the right one is the one your target employers and their specifications name. Many senior inspectors eventually hold both.

## How to prepare for the written format

1. **Write your answers out. Every time.** Reading a model answer and nodding is not preparation for a written exam. Answer first, in full sentences, then compare against a model answer and check which key points you actually covered.
2. **Know the standards by number and by content.** "The dust test" is not an answer; "ISO 8502-3 — tape lift, quantity 1–5 and size class 0–5" is.
3. **Drill the calculations until they're mechanical.** Volume solids, WFT/DFT, thinning, spreading rate and loss factor appear in some form on essentially every paper.
4. **Practise the climate rules cold.** Dew point + 3°C, RH limits, when work stops — these are both theory questions and practical-exam material.
5. **Time yourself.** Four hours sounds long until you're writing answer number sixty. Mock the real duration at least once before the exam.

## Sources

- [FROSIO — Training and certification](https://frosio.no/en/training-and-certification/) — course, exams, re-sits, certificate levels and validity
- [FROSIO — FROSIO Surface Treatment Book](https://frosiobook.no/index.php?action=home&book=frosio) — "Requirements for certification": exam length, maximum scores, pass marks and permitted aids
- [FROSIO — Surface Treatment Courses / Exams 2026](https://frosio.no/en/surface-treatment-courses-exams-2026/) — course formats and dates by training body
- [FROSIO — home page](https://frosio.no/en/) — the full Norwegian name
- [FROSIO — About FROSIO](https://frosio.no/en/about/) — the 80-hour course, accreditation to ISO 17024 since 2003
- [FROSIO — Bylaws (PDF, revision 09/2021)](https://frosio.no/en/wp-content/uploads/bylaws-2021-en.pdf) — the English name; certification under the FROSIO scheme

Checked on 1 October 2026.

Related guides: [The FROSIO calculation question, worked end-to-end](https://coatmentor.com/blog/frosio-written-calculation-worked) · [FROSIO vs AMPP CIP: which should you get?](https://coatmentor.com/blog/frosio-vs-ampp-cip) · [AMPP CIP Level 1 vs Level 2](https://coatmentor.com/blog/cip-level-1-vs-level-2).

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