EN ISO 12944-6:2018

Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)

ISO 12944-6:2018 specifies laboratory test methods and test conditions for the assessment of paint systems for the corrosion protection of carbon steel structures.
The test results are intended to be considered as an aid in the selection of suitable paint systems and not as exact information for determining durability.
ISO 12944-6:2018 covers protective paint systems designed for application to uncoated steel, hot dip galvanized steel according to ISO 1461 and steel surfaces with thermal-sprayed metallic coating according to ISO 2063‑1 and ISO 2063‑2.
ISO 12944-6:2018 does not apply to protective paint systems for electroplated or painted steel.
The environments for corrosivity categories C2 to C5 and Im1 to Im3 defined in ISO 12944‑2 are considered.

Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme - Teil 6: Laborprüfungen zur Bewertung von Beschichtungssystemen (ISO 12944-6:2018)

Dieser Teil von ISO 12944 legt Laborprüfverfahren und Prüfbedingungen für die Bewertung von Beschich-tungssystemen für den Korrosionsschutz von Stahlbauten fest.
Die Prüfergebnisse werden als Hilfsmittel zur Auswahl von geeigneten Beschichtungssystemen angesehen und nicht als genaue Angaben zur Bestimmung der Schutzdauer.
Dieser Teil von ISO 12944 gilt für Beschichtungssysteme für unbeschichteten Stahl, feuerverzinkten Stahl nach ISO 1461 und Stahloberflächen mit thermisch gespritzten Metallüberzügen nach ISO 2063.
Dieser Teil von ISO 12944 gilt nicht für Beschichtungssysteme für galvanisierten oder beschichteten Stahl.
Es werden die in ISO 12944 2 festgelegten Umgebungsbedingungen für die Korrosivitätskategorien C2 bis C5 und Im1 bis Im3 berücksichtigt.

Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture - Partie 6: Essais de performance en laboratoire (ISO 12944-6:2018)

ISO 12944-6:2018 spécifie des méthodes et des conditions d'essais en laboratoire pour l'évaluation des systèmes de peinture pour la protection contre la corrosion des structures en acier.
Les résultats d'essai sont destinés à être considérés comme une aide dans le choix des systèmes de peinture appropriés et non comme des informations exactes permettant de déterminer la durabilité.
ISO 12944-6:2018 couvre les systèmes de peinture anticorrosion conçus pour être appliqués sur acier non revêtu, sur acier galvanisé au trempé à chaud conformément à l'ISO 1461 et sur acier métallisé par projection thermique conformément à l'ISO 2063‑1 et l'ISO 2063‑2.
ISO 12944-6:2018 ne s'applique pas aux systèmes de peinture anticorrosion pour acier électroplaqué ou peint.
Les environnements de catégories de corrosivité C2 à C5 et Im1 à Im3 définis dans l'ISO 12944‑2 sont pris en compte.

Barve in laki - Protikorozijska zaščita jeklenih konstrukcij z zaščitnimi premaznimi sistemi - 6. del: Laboratorijske preskusne metode (ISO 12944-6:2018)

Ta dokument določa laboratorijske preskusne metode in preskusne pogoje za ocenjevanje premaznih sistemov za korozijsko zaščito jeklenih konstrukcij.
Rezultati preskusa naj bi šteli kot pomoč pri izbiri primernih zaščitnih premaznih sistemov in
ne kot natančne informacije za določitev trajnosti.
Ta dokument zajema zaščitne premazne sisteme, namenjene nanosu na nepremazano jeklo, vroče pocinkano jeklo v skladu s standardom ISO 1461 in jeklene površine s termično razpršenim kovinskim premazom v skladu s standardoma ISO 2063-1 in ISO 2063-2.
Ta dokument se ne uporablja za zaščitne premazne sisteme za galvansko ali lakirano jeklo.
Upoštevana so okolja za kategorije korozivnosti od C2 do C5 in od Im1 do Im3, določene v standardu ISO 12944-2.

General Information

• Status: Published
• Publication Date: 13-Feb-2018
• Withdrawal Date: 30-Aug-2018
• ICS: 87.020 - Paint coating processes
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139/SC 1 - Paints systems for the protection of steel structures against corrosion
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 14-Feb-2018
• Completion Date: 14-Feb-2018
• Ref Project: SIST EN ISO 12944-6:2018 - Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)

Relations

• Replaces: EN ISO 12944-6:1998 - Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods (ISO 12944-6:1998)
• Effective Date: 28-Jan-2015

Overview

EN ISO 12944-6:2018 - Paints and varnishes: Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance test methods. This CEN-endorsed ISO standard specifies laboratory test methods and conditions used to assess protective paint systems for the corrosion protection of carbon steel, hot‑dip galvanized steel (ISO 1461) and steel with thermal‑sprayed metallic coatings (ISO 2063‑1 / ISO 2063‑2). Test results are intended to aid selection of suitable paint systems and are not exact predictors of in-service durability.

Key topics and technical requirements

• Scope of testing: Laboratory performance tests for coatings applied to uncoated steel, hot‑dip galvanized steel and thermal‑sprayed metallic surfaces. Excludes electroplated or already painted steel.
• Corrosivity categories considered: Environments defined in ISO 12944‑2 for C2 to C5 and Im1 to Im3.
• Test panels and sampling: Requirements for substrate preparation and number of test panels to ensure representative results.
• Test procedures and durations: Defined artificial ageing procedures (including salt spray and condensation tests) and a revised cyclic ageing test regime (normative Annex B).
• Assessment criteria: Inspections and measurements before and after artificial ageing, including criteria in new assessment tables for visible defects and adhesion.
• Reporting requirements: Test report items now include photographic documentation, thickness of zinc layer, and thickness of thermal‑sprayed metallic coatings, plus other relevant test details.
• Limits and controls: Requirements for maximum film thickness and scribe‑line procedures (see ISO 9227 and Annex A references).

Applications and who uses it

EN ISO 12944-6:2018 is used by:

• Coating manufacturers to validate and compare protective paint systems.
• Specifiers, consultants and engineers selecting coating systems for bridges, buildings, offshore and infrastructure steelwork.
• Contractors and applicators to confirm suitability of systems for a given corrosivity category.
• Inspection bodies and quality assurance teams performing laboratory assessments and compiling test reports.

Practical applications include laboratory screening of primer/topcoat combinations, validating coatings for specific corrosivity categories (C2–C5, Im1–Im3), and supporting tender or compliance documentation.

Related standards

• ISO 12944 series (general guidance and corrosivity categories)
• ISO 12944‑2 (corrosivity categories)
• ISO 9227 (salt spray testing)
• ISO 1461 (hot‑dip galvanizing)
• ISO 2063‑1 / ISO 2063‑2 (thermal‑sprayed metallic coatings)
• ISO 12944‑9 (cyclic ageing tests)

Keywords: corrosion protection, protective paint systems, laboratory performance test methods, EN ISO 12944-6:2018, cyclic ageing, salt spray, hot‑dip galvanized steel, thermal‑sprayed coatings, steel structures.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2018
1DGRPHãþD
SIST EN ISO 12944-6:1998
%DUYHLQODNL3URWLNRUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO/DERUDWRULMVNHSUHVNXVQHPHWRGH,62
Paints and varnishes - Corrosion protection of steel structures by protective paint
systems - Part 6: Laboratory performance test methods (ISO 12944-6:2018)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 6: Laborprüfungen zur Bewertung von Beschichtungssystemen (ISO 12944-6:2018)
Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture -
Partie 6: Essais de performance en laboratoire (ISO 12944-6:2018)
Ta slovenski standard je istoveten z: EN ISO 12944-6:2018
ICS:
25.220.20 Površinska obdelava Surface treatment
87.040 Barve in laki Paints and varnishes
91.080.13 Jeklene konstrukcije Steel structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 12944-6
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 87.020 Supersedes EN ISO 12944-6:1998
English Version
Paints and varnishes - Corrosion protection of steel
structures by protective paint systems - Part 6: Laboratory
performance test methods (ISO 12944-6:2018)
Peintures et vernis - Anticorrosion des structures en Beschichtungsstoffe - Korrosionsschutz von
acier par systèmes de peinture - Partie 6: Essais de Stahlbauten durch Beschichtungssysteme - Teil 6:
performance en laboratoire (ISO 12944-6:2018) Laborprüfungen zur Bewertung von
Beschichtungssystemen (ISO 12944-6:2018)
This European Standard was approved by CEN on 22 January 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12944-6:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 12944-6:2018) has been prepared by Technical Committee ISO/TC 35 "Paints
and varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2018, and conflicting national standards shall
be withdrawn at the latest by August 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 12944-6:1998.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 12944-6:2018 has been approved by CEN as EN ISO 12944-6:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 12944-6
Second edition
2018-01
Paints and varnishes — Corrosion
protection of steel structures by
protective paint systems —
Part 6:
Laboratory performance test methods
Peintures et vernis — Anticorrosion des structures en acier par
systèmes de peinture —
Partie 6: Essais de performance en laboratoire
Reference number
ISO 12944-6:2018(E)
©
ISO 2018
ISO 12944-6:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 12944-6:2018(E)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 3
4.1 Relationship between artificial ageing and natural exposure . 3
4.2 Additional performance tests . 3
5 Tests . 3
5.1 Test panels . 3
5.1.1 Carbon steel . 3
5.1.2 Hot dip galvanized steel . 3
5.1.3 Thermal-sprayed metallic coatings . 4
5.2 Sampling of paints . 4
5.3 Number of test panels . 4
5.4 Paint systems . 4
5.5 Reference system . 4
5.6 Test procedures and duration . 4
6 Paint system assessment. 6
6.1 General . 6
6.2 Assessment before artificial ageing . 6
6.3 Assessment after artificial ageing for the specified time. 6
7 Test report . 7
Annex A (normative) Scribe line for ISO 9227 test and ISO 12944-9 cyclic ageing test .9
Annex B (normative) Cyclic ageing test .11
Bibliography .12
ISO 12944-6:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 14, Protective paint systems for steel structures.
This second edition cancels and replaces the first edition (ISO 12944-6:1998), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— the normative references have been updated;
— the terms and definitions have been revised;
— 4.2 “Additional performance tests” has been revised and the Note deleted;
— 5.1 “Test panels” has been revised;
— 5.4 “Paint systems” has been revised and requirements for maximum film thickness added;
— 5.6 “Test procedures and duration” has been revised and includes a revised Table 1;
— Table 1 “Test procedures for paint systems applied to carbon steel, hot dip galvanized steel or steel
with thermal-sprayed metallic coating” has been divided into two separate tables, one containing
categories C1 to C5 and one containing categories Im1 to Im3;
— the former Table 2 has been deleted;
— Clause 6 “Paint system assessment” has been revised;
— in 6.2 a new Table 3 “Assessment before artificial ageing” has been included;
— in 6.3 a new Table 4 “Assessment after artificial ageing for the specified time” has been included;
— in Clause 7 “Test report” the following items were added: “photographic documents […]”, “thickness
of zinc layer […]”, and “thickness of the thermal-sprayed metallic coating […]”;
iv © ISO 2018 – All rights reserved

ISO 12944-6:2018(E)
— Annex A has been revised and Figures A.1 and A.2 have been added;
— a new normative Annex B “Cyclic ageing test” has been added;
— the former Annex B has been deleted;
— a Bibliography has been added;
— the text has been editorially revised.
A list of all parts in the ISO 12944 series can be found on the ISO website.
ISO 12944-6:2018(E)
Introduction
Unprotected steel in the atmosphere, in water and in soil is subject to corrosion that can lead to
damage. Therefore, to avoid corrosion damage, steel structures are normally protected to withstand
the corrosion stresses to which they will be subjected during the service life required of the structure.
There are different ways of protecting steel structures from corrosion. ISO 12944 (all parts) deals with
protection by paint systems and covers, in the various parts, all features that are important in achieving
adequate corrosion protection. Additional or other measures are possible but require particular
agreement between the interested parties.
In order to ensure effective corrosion protection of steel structures, owners of such structures, planners,
consultants, companies carrying out corrosion protection work, inspectors of protective coatings
and manufacturers of coating materials need to have at their disposal state-of-the-art information in
concise form on corrosion protection by paint systems. It is vital that such information is as complete as
possible, unambiguous and easily understandable to avoid difficulties and misunderstandings between
the parties concerned with the practical implementation of protection work.
ISO 12944 (all parts) is intended to give this information in the form of a series of instructions. It is
written for those who have some technical knowledge. It is also assumed that the user of ISO 12944 (all
parts) is familiar with other relevant International Standards, in particular those dealing with surface
preparation.
Although ISO 12944 (all parts) does not deal with financial and contractual questions, attention is
drawn to the fact that, because of the considerable implications of inadequate corrosion protection,
non-compliance with requirements and recommendations given in this document can result in serious
financial consequences.
ISO 12944-1 defines the overall scope of ISO 12944. It gives some basic terms and definitions and a
general introduction to the other parts of ISO 12944. Furthermore, it includes a general statement on
health, safety and environmental protection, and guidelines for using ISO 12944 (all parts) for a given
project.
This document provides a way of assessing paint systems by means of laboratory tests in order to be
able to select the most suitable.
Cyclic ageing testing according to Annex B is introduced within this document. It is currently used in C5
VH/ H and C4 VH. In case of C5 H and C4 VH the test regime including salt spray and condensation test
can still be used as alternative to cyclic ageing test. For the future, it is intended to remove salt spray
and condensation tests as alternative tests for C5 H and C4 VH.
vi © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 12944-6:2018(E)
Paints and varnishes — Corrosion protection of steel
structures by protective paint systems —
Part 6:
Laboratory performance test methods
1 Scope
This document specifies laboratory test methods and test conditions for the assessment of paint
systems for the corrosion protection of carbon steel structures.
The test results are intended to be considered as an aid in the selection of suitable paint systems and
not as exact information for determining durability.
This document covers protective paint systems designed for application to uncoated steel, hot dip
galvanized steel according to ISO 1461 and steel surfaces with thermal-sprayed metallic coating
according to ISO 2063-1 and ISO 2063-2.
This document does not apply to protective paint systems for electroplated or painted steel.
The environments for corrosivity categories C2 to C5 and Im1 to Im3 defined in ISO 12944-2 are
considered.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
ISO 1513, Paints and varnishes — Examination and preparation of test samples
ISO 2063-1, Thermal spraying — Zinc, aluminium and their alloys — Part 1: Design considerations and
quality requirements for corrosion protection systems
ISO 2063-2, Thermal spraying — Zinc, aluminium and their alloys — Part 2: Execution of corrosion
protection systems
ISO 2409, Paints and varnishes — Cross-cut test
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2812-2, Paints and varnishes — Determination of resistance to liquids — Part 2: Water immersion method
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning
and testing
ISO 4624, Paints and varnishes — Pull-off test for adhesion
ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of
blistering
ISO 12944-6:2018(E)
ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting
ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of
cracking
ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and
size of defects, and of intensity of uniform changes in appearance — Par
...