EN ISO 12944-1:1998

SLOVENSKI STANDARD
01-september-1998
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Paints and varnishes - Corrosion protection of steel structures by protective paint
systems - Part 1: General introduction (ISO 12944-1:1998)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 1: Allgemeine Einleitung (ISO 12944-1:1998)
Peintures et vernis - Anticorrosion des structures en acier par systemes de peinture -
Partie 1: Introduction générale (ISO 12944-1:1998)
Ta slovenski standard je istoveten z: EN ISO 12944-1:1998
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.

INTERNATIONAL ISO
STANDARD 12944-1
First edition
1998-05-15
Paints and varnishes — Corrosion
protection of steel structures by protective
paint systems
Part 1:
General introduction
Peintures et vernis — Anticorrosion des structures en acier par systèmes
de peinture —
Partie 1: Introduction générale
A
Reference number
ISO 12944-1:1998(E)
ISO 12944-1:1998(E)
Contents Page
1 Scope .
2 Normative references . 3
3 Definitions . 3
4 General considerations and requirements . 4
5 Health and safety and environmental protection . 4
6 Information on the other parts of ISO 12944 . 5
Annex
A Guidelines for using ISO 12944 for a given project . 6
©  ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
©
ISO ISO 12944-1:1998(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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 12944-1 was prepared by Technical Committee
ISO/TC 35, Paints and varnishes, Subcommittee SC 14, Corrosion
protection of steel structures by protective paint systems.
ISO 12944 consists of the following parts, under the general title Paints
and varnishes — Corrosion protection of steel structures by protective
paint systems:
— Part 1: General introduction
— Part 2: Classification of environments
— Part 3: Design considerations
— Part 4: Types of surface and surface preparation
— Part 5: Protective paint systems
— Part 6: Laboratory performance test methods
— Part 7: Execution and supervision of paint work
— Part 8: Development of specifications for new work and maintenance
Annex A of this part of ISO 12944 is for information only.
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©
ISO 12944-1:1998(E) ISO
Introduction
Unprotected steel in the atmosphere, in water and in soil is subject to
corrosion that may lead to damage. Therefore, to avoid corrosion damage,
steel structures are normally protected to withstand the corrosion stresses
during the service life required of the structure.
There are different ways of protecting steel structures from corrosion.
ISO 12944 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, it is
necessary for owners of such structures, planners, consultants, companies
carrying out corrosion protection work, inspectors of protective coatings
and manufacturers of coating materials to have at their disposal state-of-
the-art information in concise form on corrosion protection by paint
systems. Such information has to be as complete as possible,
unambiguous and easily understandable to avoid difficulties and
misunderstandings between the parties concerned with the practical
implementation of protection work.
This International Standard — ISO 12944 — 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 is familiar with other relevant International Standards, in
particular those dealing with surface preparation, as well as relevant
national regulations.
Although ISO 12944 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 standard may result in serious financial
consequences.
ISO 12944-1 defines the overall scope of all parts 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
for a given project.
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INTERNATIONAL STANDARD  ISO ISO 12944-1:1998(E)
Paints and varnishes — Corrosion protection of steel structures
by protective paint systems
Part 1:
General introduction
1  Scope
1.1  ISO 12944 deals with the corrosion protection of steel structures by protective paint systems.
1.2  ISO 12944 covers only the corrosion-protective function of paint systems. Other protective functions, like the
protection against:
— microorganisms (marine fouling, bacteria, fungi, etc.),
— chemicals (acids, alkalis, organic solvents, gases, etc.),
— mechanical action (abrasion, etc.) and
— fire
are not covered by ISO 12944.
1.3  The field of application is characterized by:
— the type of structure,
— the type of surface and surface preparation,
— the type of environment,
— the type of protective paint system,
— the type of work and
— the durability of the protective paint system.
Although ISO 12944 does not cover all types of structure, surface and surface preparation, it may, by agreement,
also be applied to those cases which are not covered by the standard.
The various aspects of the field of application are described in more detail in 1.3.1 to 1.3.6.
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ISO
ISO 12944-1:1998(E)
1.3.1  Type of structure
ISO 12944 concerns structures made of carbon or low-alloy steel (e.g. in accordance with EN 10025) of not less
than 3 mm thickness, which are designed using an approved strength calculation.
Not covered by ISO 12944 are concrete structures reinforced with steel.
1.3.2  Type of surface and surface preparation
ISO 12944 deals with the following types of surface consisting of carbon or low-alloy steel, and their preparation:
— uncoated surfaces;
— surfaces thermally sprayed with zinc, aluminium or their alloys;
— hot-dip-galvanized surfaces;
— zinc-electroplated surfaces;
— sherardized surfaces;
— surfaces painted with prefabrication primer;
— other painted surfaces.
1.3.3  Type of environment
ISO 12944 deals with:
— six corrosivity categories for atmospheric environments,
— three categories for structures immersed in water or buried in soil.
1.3.4  Type of protective paint system
ISO 12944 covers a range of paint products which dry or cure at ambient conditions.
Not covered by ISO 12944 are:
— powder coating materials,
— stoving enamels,
— heat-cured paints,
— coatings of more than 2 mm dry-film thickness,
— linings of tanks,
— products for the chemical treatment of surfaces (e.g. phosphating solutions).
1.3.5  Type of work
ISO 12944 covers both new work and maintenance.
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ISO
ISO 12944-1:1998(E)
1.3.6  Durability of the protective paint system
ISO 12944 considers three different durability ranges (low, medium and high). See 3.5 and clause 4.
The durability range is not a “guarantee time”.
2  Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part
of ISO 12944. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 12944 are encouraged to investigate the possibility of applying the
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently
valid International Standards.
ISO 4628-1:1982, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 1: General principles and rating schemes.
ISO 4628-2:1982, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 2: Designation of degree of blistering.
ISO 4628-3:1982, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 3: Designation of degree of rusting.
ISO 4628-4:1982, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 4: Designation of degree of crackin
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