EN ISO 12944-4:1998

Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 4: Types of surface and surface preparation (ISO 12944-4:1998)

Migrated from Progress Sheet (TC Comment) (2000-07-10): !!! prEN ISO 12944-1 to -8 are a package: DOW = 1997-12-31 !!! (BT C 95/1996)

Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme - Teil 4: Arten von Oberflächen und Oberflächenvorbereitung (ISO 12944-4:1998)

Dieser Teil von ISO 12944 behandelt die folgenden Arten von Oberflächen von Stahlbauten aus unlegiertem und niedriglegiertem Stahl und deren Vorbereitung: - unbeschichte Oberflächen, - Oberflächen mit thermisch gespritztem Überzug aus Zink, ALuminium oder deren Legierungen; - feuerverzinkte Oberflächen; - galvanisch verzinkte Oberflächen; - sherardieserte Oberflächen; - Oberflächenm mit Fertigunsbeschichtungen; andere beschichtete Oberflächen.

Peintures et vernis - Anticorrosion des structures en acier par systèmes de peinture - Partie 4: Types de surface et de préparation de surfaces (ISO 12944-4:1998)

Barve in laki - Korozijska zaščita jeklenih konstrukcij z zaščitnimi premaznimi sistemi - 4. del: Tipi površin in priprava površine (ISO 12944-4:1998)

General Information

• Status: Withdrawn
• Publication Date: 14-May-1998
• Withdrawal Date: 19-Dec-2017
• 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: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 20-Dec-2017
• Ref Project: SIST EN ISO 12944-4:1998 - Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 4: Types of surface and surface preparation (ISO 12944-4:1998)

Relations

• Replaced By: EN ISO 12944-4:2017 - Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 4: Types of surface and surface preparation (ISO 12944-4:2017)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-1998
%DUYHLQODNL.RUR]LMVND]DãþLWDMHNOHQLKNRQVWUXNFLM]]DãþLWQLPLSUHPD]QLPL
VLVWHPLGHO7LSLSRYUãLQLQSULSUDYDSRYUãLQH,62
Paints and varnishes - Corrosion protection of steel structures by protective paint
systems - Part 4: Types of surface and surface preparation (ISO 12944-4:1998)
Beschichtungsstoffe - Korrosionsschutz von Stahlbauten durch Beschichtungssysteme -
Teil 4: Arten von Oberflächen und Oberflächenvorbereitung (ISO 12944-4:1998)
Peintures et vernis - Anticorrosion des structures en acier par systemes de peinture -
Partie 4: Types de surface et de préparation de surfaces (ISO 12944-4:1998)
Ta slovenski standard je istoveten z: EN ISO 12944-4:1998
ICS:
25.220.10 Priprava površine Surface preparation
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 12944-4
First edition
1998-05-15
Paints and varnishes — Corrosion
protection of steel structures by protective
paint systems
Part 4:
Types of surface and surface preparation
Peintures et vernis — Anticorrosion des structures en acier par systèmes
de peinture —
Partie 4: Types de surface et de préparation de surface
A
Reference number
ISO 12944-4:1998(E)
ISO 12944-4:1998(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 Definitions . 3
4 General . 4
5 Types of surface to be prepared . 4
6 Surface preparation methods . 5
7 Surface preparation grades . 9
8 Surface profile (roughness) and surface profile grading . 10
9 Assessment of prepared surfaces . 10
10 Temporary protection of prepared surfaces from corrosion
and/or contamination . 11
11 Preparation of temporarily or partly protected surfaces
before application of further coatings . 11
12 Preparation of hot-dip-galvanized surfaces . 11
13 Preparation of thermally sprayed metal
(zinc and aluminium) surfaces . 12
14 Preparation of zinc-electroplated and sherardized surfaces 12
15 Preparation of other coated surfaces . 12
16 Recommendations regarding pollution and the environment 13
17 Health and safety . 13
Annexes
A Standard preparation grades for primary (overall) surface
preparation . 14
B Standard preparation grades for secondary (partial) surface
preparation . 15
C Procedures for removal of extraneous layers and foreign
matter . 17
©  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 [e-mail]
Printed in Switzerland
ii
©
ISO ISO 12944-4:1998(E)
D Bibliography . 19
E Alphabetical index of terms . 20
iii
©
ISO 12944-4:1998(E) ISO
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 12944-4 was prepared by Technical Committee
ISO/TC 35, Paints and varnishes, Subcommittee SC 14, Protective paint
systems for steel structures.
ISO 12944 consists of the following parts, under the general title Paints
and varnishes — Protective paint systems for steel structures:
— 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
Annexes A and B form an integral part of this part of ISO 12944. Annexes
C, D and E are for information only.
iv
©
ISO ISO 12944-4:1998(E)
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.
This part of ISO 12944 describes different types of surface to be protected
and gives information on surface preparation methods such as chemical,
mechanical and flame cleaning. It deals with surface preparation grades,
surface profile (roughness), assessment of prepared surfaces, temporary
protection of prepared surfaces, preparation of temporarily protected
surfaces for further coatings, preparation of existing metal coatings, and
environmental aspects. As far as possible, reference is made to the basic
International Standards on the surface preparation of steel substrates
before application of paints and related products.
v
©
INTERNATIONAL STANDARD  ISO ISO 12944-4:1998(E)
Paints and varnishes — Corrosion protection of steel structures
by protective paint systems
Part 4:
Types of surface and surface preparation
1  Scope
This part of ISO 12944 deals with the following types of surfaces of steel structures 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.
This part of ISO 12944 defines a number of surface preparation grades but does not specify any requirements for
the condition of the substrate prior to surface preparation.
Highly polished surfaces and work-hardened surfaces are not covered by this part of ISO 12944.
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.
1)
ISO 1461:— , Hot dip galvanized coatings on fabricated ferrous products — Specifications.
ISO 2063:1991, Metallic and other inorganic coatings — Thermal spraying — Zinc, aluminium and their alloys.
ISO 2409:1992, Paints and varnishes — Cross-cut test.

1)  To be published. (Revision of ISO 1459:1973 and ISO 1461:1973)
©
ISO
ISO 12944-4:1998(E)
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 cracking.
ISO 4628-5:1982, Paints and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 5: Designation of degree of flaking.
ISO 4628-6:1990, Paint and varnishes — Evaluation of degradation of paint coatings — Designation of intensity,
quantity and size of common types of defect — Part 6: Rating of degree of chalking by tape method.
ISO 8501-1:1988, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and
steel substrates after overall removal of previous coatings.
Informative Supplement to ISO 8501-1:1988, Representative photographic examples of the change of appearance
imparted to steel when blast-cleaned with different abrasives.
ISO 8501-2:1994, Preparation of steel substrates before application of paints and related products — Visual
assessment of surface cleanliness — Part 2: Preparation grades of previously coated steel substrates after
localized removal of previous coatings.
ISO/TR 8502-1:1991, Preparation of steel substrates before application of paints and related products — Tests for
the assessment of surface cleanliness — Part 1: Field test for soluble iron corrosion products.
ISO 8502-2:1992,
Preparation of steel substrates before application of paints and related products — Tests for the
assessment of surface cleanliness — Part 2: Laboratory determination of chloride on cleaned surfaces.
ISO 8502-3:1992, Preparation of steel substrates before application of paints and related products — Tests for the
assessment of surface cleanliness — Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-
sensitive tape method).
ISO 8502-4:1993, Preparation of steel substrates before application of paints and related products — Tests for the
assessment of surface cleanliness — Part 4: Guidance on the estimation of the probability of condensation prior to
paint application.
ISO 8503-1:1988, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 1: Specifications and definitions for ISO surface
profile comparators for the assessment of abrasive blast-cleaned surfaces.
ISO 8503-2:1988, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 2: Method for the grading of surface profile of
abrasive blast-cleaned steel — Comparator procedure.
ISO 8504-1:1992, Preparation of steel substrates before application of paints and
...