ISO 8501-1:1988
(Main)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 of steel substrates after overall removal of previous coatings
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 of steel substrates after overall removal of previous coatings
Identifies four levels of mill scale and rust that are commonly found on surfaces of uncoated steel. It also identifies certain degrees of visual cleanliness after surface preparation of uncoated steel surfaces and of steel surfaces after total removal of any previous coating. Are defined by written descriptions together with photographic examples. Is equivalent to Swedish Standard SS 05 59 00 (88) which is used on a world-wide scale, contains 28 photographs and was published in the three ISO languages together with German, Dutch, Italian, Spanish, Portuguese, Arabic, Swedish, Japanese and Chinese.
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés — Évaluation visuelle de la propreté d'un subjectile — Partie 1: Degrés de rouille et degrés de préparation des subjectiles d'acier non recouverts et des subjectiles d'acier après décapage sur toute la surface des revêtements précédents
General Information
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Standards Content (Sample)
INTERNATIONAL STANDARD IS0
NORME INTERNATIONALE 8501-1
First edition
MEXAYHAPOAHbIn CTAHAAPT Première edition
nepeoe nina~me
1988-12-15
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXLIYHAPOAHAR OPTAHH3AUHR fl0 CTAHPAPTH3AUHH
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
of steel substrates after overall removal of previous coatings
Preparation des subjectiles d'acier avant application de
peintures et de produits assirnil6s - haluation visuelle de la
propret6 d'un subjectile -
Partie 1 :
Degres de rouille et degres de preparation des subjectiles d'acier
non recouverts et des subjectiles d'acier aprhs decapage sur toute la
surface des revbtements precedents
teference number
VumCro de réference
4oMep ccbinw
SO 8501-1 : 1988 (E/F/R)
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i IS0 8501-Cl988
3 ISOnndSIS1988
K weziira Goteborg 1999 Printed in Sweden
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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies
(IS0 member bodies). The work of preparing International Standards is normally carried out through IS0
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 cornmittee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to the member bodies for
approval before their acceptance as International Standards by the IS0 Council. They are approved in accord-
ance with IS0 procedures requiring at least 75 % approval by the member bodies voting.
International Standard IS0 8501-1 was prepared by Technical Committee ISO/TC 35, Paintsand varnishes, and
is published in collaboration with the Standardiseringskommissionen i Sverige (SIS).
Users should note that all International Standards undergo revision from time to time and that any reference
made herein to any other International Standard implies its latest edition, unless otherwise stated.
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de I'ISO). L'élaboration des Normes internationales est normalement confiée
aux comités techniques de I'ISO. Chaque cornite membre intéresd par une étude a le droit de faire partie du
comité technique Cr&é B cet effet. Les organisations internationales. gouvernementales et non gouvernemen-
tales, en liaison avec I'ISO participent également aux travaux.
Les projets de Normes internationales adoptes par les comités techniques sont soumis aux comites membres
I'ISO. Les Normes
pour approbation, avant leur acceptation comme Normes internationales par le Conseil de
internationales sont approuvées conformément aux procédures de I'ISO qui requibrent l'approbation de 75 %
au moins des comités membres votants.
La Norme internationale IS0 8501-1 a été élaborée par le comité technique ISO/TC 35, Peintures et vernis, et
publiée en collaboration avec la Standardiseringskommissionen i Sverige (SIS).
L'attention des utilisateurs est attirée sur le fait que toutes les Normes internationales sont de temps en temps
soumises B révision et que toute référence faite une autre Norme internationale dans le présent document
implique qu'il s'agit, sauf indication contraire, de la dernihre édition.
ii
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IS0 8501-1 : 1988 (E/F/R)
Preparation of steel substrates before application of paints and related products - Visual
assessment of surface cleanliness - Pert 1 : Rust grades and preparation grades of uncoated
of previous coatings, . 1
steel substrates and of steel substrates after overall removal
Preparation des subjectiles d‘acier avant application de peintures et de produits assimiles -
Evaluation visuelle de la propret6 d’un subjectile - Partie 1 : Degres de rouille et degres de
preparation des subjectiles d’acier non recouverts et des subjectiles d‘acier aprh decapage sur
toute la surface des revhments precedents . 11
fioflroroslca cTanbnuü ocnoab! nepan nanecennent rpacolc m nono6nux nonpbirnl - Bnayanbnan oqenra
wcrorbi noiepxnocrm - rlacrb I : CTenenn pxaiocrm H crenenm noaroroinm nenorpwoü cranbnoü
ocnoiu m cranbnoü ocnoiu nocne nonnoro y4anenmn npexnux nonpbirmü . 21
Annexes/flpnnoxenmR
SS 05 59 M1988: Behandling av stalytor fore belaggning med milningsfarg och liknande pro-
dukter - Visuel1 utvardering av prenhet - Del 1 : Rostgrader och forbehandlingsgrader f& obelagt
stal och for stal, fran vars hela yta tidigare belaggning avlagsnats . 31
Vorbereitung von Stahloberflachen vor dem Auftragen von Beschichtungsstoffen - Visuelle
Beurteilung der Oberflachenreinheit - Teil 1 : Rostgrade und Oberflschenvorbereitungsgrade von
unbeschichteten Stahloberflachen und Stahloberflachen nach ganzflachigem Entfernen vorhandener
Beschichtungen . . .
43
Voorbehandeling van Staal voor het opbrengen van verf en aanvewante produkten - Visuele
- Deel 1 : Roestgraden en reinheidsgraden van onbedekt Staal
beoordeiing van oppervlaktereinheid
en van Staal na volledige verwijdering van eerdere deklagen . 53
Preparazione delle superfici di acciaio prima di applicare vernici e prodotti affini - Valutazione visiva
del grado di pulitura della superficie - Parte 1 : Gradi di arrugginimento e gradi di preparazione di
superfici di acciaio non tr tat0 rirnosso un rivestimento
precedente . . 63
Preparaci6n de superficies de acero antes de apiicarles pinturas y productos anhlogos - Evaiuaci6n
visual de la limpieza superficial - Parte 1 : Grados de oxidaci6n y de preparaci6n de las superficies de
acero sin recubrir y de las superficies de acero despubs de elirninar totalmente los recubrirnientos
anteriores . 73
Preparaçlo do superficies de aço antes da aplicaçlo de tintas e produtos similares - Avaliaçlo visuai
da limpeza de superficies - Parte 1 : Graus de enferrujamento e graus de preparaçlo de superficies
emoçlo total de camadas de revestimento pr&
de aço Sem revestimento e de superficies d
existentes . . 83
tjla+l hua $41 +I\-++\ a\$\> LmJL 4% 3j k!iYyJI &LI Cjhd j&
pli J~~~ c~, ;,Lkllli.~j.jYjji~~~iC~”CLi,~~~jd,i,i~ijG,i :JJYI
, Lli SUI y?& d\ji + Wl +Y
93
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IR 1 lil: *~~~~~A~IE~~f~fll~~~l~~~~~~~~~~~~~~~y~~ , , , . , , , , , , , , , 105
113
iii
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INTERNATIONAL STANDARD IS0 8501-1 : 1988 (E)
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
of steel substrates after overall removal of previous coatings
O Introduction
The performance of protective coatings of paint and related products applied to steel is
significantly affected by the state of the steel surface immediately prior to painting. The
principal factors that are known to influence this performance are
the presence of rust and mill scale;
a)
the presence of surface contaminants, including salts, dust, oils and greases;
b)
c) the surface profile.
International Standards IS0 8501, IS0 8502 and IS0 8503 have been prepared to pro-
IS0 8504 provides guidance on the
vide methods of assessing these factors, while
preparation methods that are available for cleaning steel substrates, indicating the
capabilities of each in attaining specified levels of cleanliness.
These International Standards do not contain recommendations for the protective
coating systems to be applied to the steel surface. Neither do they contain recommen-
dations for the surface quality requirements for specific situations even though surface
quality can have a direct influence on the choice of protective coating to be applied and
on its performance. Such recommendations are found in other documents such as
national standards and codes of practice. It will be necessary for the users of these
International Standards to ensure that the qualities specified are
-
compatible and appropriate both for the environmental conditions to which the
steel will be exposed and for the protective coating system to be used;
-
within the capability of the cleaning procedure specified.
The four International Standards referred to above deal with the following aspects of
preparation of steel substrates :
IS0 8501 - Visual assessment of surface cleanliness:
1
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IS0 8501-1 : 1988 (E)
IS0 8502 - Tests for the assessment of surface cleanliness;
IS0 8503 - Surface roughness characteristics of blast-cleaned steel substrates;
IS0 8504 - Surface preparation methods.
Each of these International Standards is in turn divided into separate parts.
This part of IS0 8501 identifies four levels (designated as “rust grades”) of mill scale
and rust that are commonly found on surfaces of uncoated erected steel and steel held
in stock. It also identifies certain degrees of visual cleanliness (designated as “prepara-
tion grades”) after surface preparation of uncoated steel surfaces and of steel surfaces
after overall removal of any previous coating. These levels of visual cleanliness are
related to the common methods of surface cleaning that are used prior to painting.
This part of IS0 8501 is intended to be a tool for visual assessment of rust grades and
of preparation grades. It includes 28 representative photographic examples.
NOTES
1 Twenty-four of the photographs originate from the Swedish standard SIS 05 59 00-1967,
Pictorial surface preparation standards for painting steel surfaces, which is superseded by this
part of IS0 8501 (see annex A). The other four photographs originate from the German standard
DIN 55 928, Part 4, Supplement 1 (August 1978), Protection of steelstructures from corrosion by
organic and metallic coatings; preparation and testing of surfaces; photographic standards.
Originally SIS 05 59 O0 was developed by the Swedish Corrosion Institute in co-operation with the
American Society for Testing and Materials (ASTM) and the Steel Structures Painting Council
(SSPC), USA. There are a number of national standards based on SIS 05 59 00, such as
DIN 55928, Part 4 (1977). TGL 18730102 (19771, DS 2019 (19671, AS 1627, Part 9-1974,
ASTM D 2200-67 (1980) and SSPC-Vis 1-82 T. In addition, there are other standards that have a
similar layout, for example JSRA SPSS-1975, but which are less widely used and therefore were
not taken into account.
The reasons for adopting the essential elements of SIS 05 59 00, including its format, are as
:
follows
ai SIS 05 59 00 is already used on a world-wide scale;
b) the creation of a completely new set of photographs would be costly and would not
necessarily introduce any corresponding improvements;
c) previous and current documents relating to this established system of rust grades and
preparation grades could continue to be used in the future without amendment and without
confusion;
the A5 (pocket) size is convenient to handle and to refer to on site.
d)
This part of IS0 8501 represents a slight extension of earlier editions of SIS 05 59 00 in that it is
applicable also to surfaces that show residues of adhering paint and other foreign matter in addi-
tion to mill scale and rust.
2
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IS0 8501-1 : 1988 (E)
2 This part of IS0 8501 contains the text in the three official languages of ISO, namely English,
French and Russian. It also contains the following annexes giving the equivalent text in other
languages, published under the responsibility of the respective body indicated :
Annex A : Swedish (SIS : the text is the 1988 edition of the Swedish standard SS 05 59 00)
Annex B : German (DIN)
Annex C : Dutch (“1)
Annex D : Italian (UNI)
Annex E : Spanish (AENOR)
Annex F : Portuguese (IPQ)
Annex G : Arabic (ASMO)
Annex H : Japanese (JISC)
Annex J : Chinese (CSBS)
1 Scope and field of application
This part of IS0 8501 specifies a series of rust grades and preparation grades of steel
surfaces (see clauses 3 and 4, respectively). The various grades are defined by written
descriptions together with photographs that are representative examples within the
tolerance for each grade as described in words.
It is applicable to hot-rolled steel surfaces prepared for painting by methods such as
blast-cleaning, hand and power tool cleaning and flame cleaning, although these
methods rarely lead to comparable results. Essentially, these methods are intended for
hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-
rolled steel of sufficient thickness to withstand any deformation caused by the impact
of the abrasive or the effects of power tool cleaning.
This part of IS0 8501 is applicable also to steel substrates that show residues of firmly
adhering paint and other foreign matter (see note 2 to 4.1) in addition to residual mill
scale.
NOTE - The preparation grades of previously painted steel surfaces after only localized removal
of paint coatings form the subject of IS0 8501-2.
It relates the cleanliness of the surface to its visual appearance. In many instances, this
is sufficient for the purpose but for coatings likely to be exposed to severe environ-
ments, such as water immersion and continuous condensation conditions, considera-
tion should be given to testing for soluble salts and other invisible contaminants on the
visually clean surface by the physical and chemical methods which form the subjects of
the various parts of IS0 8502. The roughness characteristics of the surface should also
be considered by reference to IS0 8503.
3
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IS0 8501-1 : 1988 (E)
2 References
IS0 8501-2, 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. 1 )
IS0 8502, Preparation of steel substrates before application of paints and related pro-
ducts - Tests for the assessment of surface cleanliness. 1)
IS0 8503, Preparation of steel substrates before application of paints and related pro-
ducts - Surface roughness characteristics of blast-cleaned steel substrates.
IS0 8504, Preparation of steel substrates before application of paints and related pro-
ducts - Surface preparation methods
- Part 2 : Abrasive blast-cleaning. 1)
- Part 3 : Hand and power tool cleaning.1)
3 Rust grades
Four rust grades, designated A, 6, C and D respectively, are specified. The rust grades
are defined by written descriptions together with representative photographic ex-
amples (see clause 61.
A Steel surface largely covered with adhering mill scale but little, if any, rust.
B Steel surface which has begun to rust and from which the mill scale has begun
to flake.
Steel surface on which the mill scale has rusted away or from which it can be
C
scraped, but with slight pitting visible under normal vision.
D Steel surface on which the mill scale has rusted away and on which general
pitting is visible under normal vision.
4 Preparation grades
4.1 General
A number of preparation grades, indicating the method of surface preparation and the
4.2, 4.3 and
degree of cleaning, are specified. The preparation grades are defined (see
4.4) by written descriptions of the surface appearance after the cleaning operation,
together with representative photographic examples (see clause 6).
1) To be published.
4
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IS0 8501-1 : 1988 (E)
Each preparation grade is designated by the appropriate letters “Sa”, “St” or ”FI” to
indicate the type of cleaning method used. The number following, if any, indicates the
degree of cleaning from mill scale, rust and previous coatings.
The photographs are designated by the original rust grade before cleaning and the
designation of the preparation grade, for example B Sa 21/2.
NOTES
1 The term “foreign matter” used in 4.2, 4.3 and 4.4 may include water-soluble salts and
welding residues. These contaminants cannot be completely removed from the surface by dry
blast-cleaning, hand and power tool cleaning or flame cleaning; wet blast-cleaning should be
used.
2 Mill scale, rust or a paint coating is considered to be poorly adhering if it can be removed by
lifting with a blunt putty knife.
4.2 Blast-cleaning, Sa
Surface preparation by blast-cleaning is designated by the letters “Sa”.
Prior to blast-cleaning, any heavy layers of rust shall be removed by chipping. Visible
oil, grease and dirt shall also be removed.
After blast-cleaning, the surface shall be cleaned from loose dust and debris.
NOTE - For descriptions of surface preparation methods by blast-cleaning, including treatment
IS0 8504-2.
prior to, and after, the blast-cleaning procedure, see
Sa 1 Light blast-cleaning
When viewed without magnification, the surface shall be free from visible oil,
grease and dirt, and from poorly adhering mill scale, rust, paint coatings and
foreign matter (see note 2 to 4.1 1. See photographs B Sa 1, C Sa 1 and D Sa 1.
Sa 2 Thorough blast-cleaning
When viewed without magnification, the surface shall be free from visible oil,
grease and dirt, and from most of the mill scale, rust, paint coatings and foreign
matter. Any residual contamination shall be firmly adhering (see note 2 to 4.1 1.
See photographs B Sa 2, C Sa 2 and D Sa 2.
Sa 2% Very thorough blast-cleaning
When viewed without magnification, the surface shall be free from visible oil,
grease and dirt, and from mill scale, rust, paint coatings and foreign matter. Any
remaining traces of contamination shall show only as slight stains in the form of
spots or stripes. See photographs A Sa 2112, B Sa 2712, C Sa 2112 and D Sa 2112.
5
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IS0 8501-1 : 1988 (E)
Sa 3 Blast-cleaning to visually clean steel
When viewed without magnification, the surface shall be free from visible oil,
grease and dirt, and shall be free from mill scale, rust, paint coatings and foreign
matter. It shall have a uniform metallic colour. See photographs A Sa 3,
B Sa 3, C Sa 3 and D Sa 3.
4.3 Hand and power tool cleaning, St
Surface preparation by hand and power tool cleaning, such as scraping, wire-
brushing, machine-brushing and grinding, is designated by the letters "St".
Prior to hand and power tool cleaning, any heavy layers of rust shall be removed by
chipping. Visible oil, grease and dirt shall also be removed.
After hand and power tool cleaning, the surface shall be cleaned from loose dust and
debris.
NOTES
1 For descriptions of surface preparation methods by hand and power tool cleaning, including
treatment prior to, and after, the hand and power tool cleaning procedure, see IS0 8504-3.
2 Preparation grade St 1 is not included as it would correspond to a surface unsuitable for
painting.
St 2 Thorough hand and power tool cleaning
When viewed without magnification, the surface shall be free from visible oil,
grease and dirt, and from poorly adhering mill scale, rust, paint coatings and
2 to 4.1 ). See photographs B St 2, C St 2 and D St 2.
foreign matter (see note
St 3 Very thorough hand and power tool cleaning
As for St 2, but the surface shall be treated much more thoroughly to give a
metallic sheen arising from the metallic substrate. See photographs B St 3,
C St 3 and D St 3.
4.4 Flame cleaning, FI
Surface preparation by flame cleaning is designated by the letters "FI".
NOTE - Flame cleaning includes final power tool wire-brushing to remove the products of the
cleaning process; hand wire-brushing does not achieve a satisfactory surface for painting.
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IS0 8501-1 : 1988 (E)
Prior to flame cleaning, any heavy layers of rust shall be removed by chipping.
After flame cleaning, the surface shall be cleaned by power tool wire-brushing.
FI Flame cleaning
When viewed without magnification, the surface shall be free from mill scale,
rust, paint coatings and foreign matter. Any remaining residues shall show only
as a discoloration of the surface (shades of different colours). See photographs
A FI, E FI, C FI and D FI.
5 Procedure for visual assessment of steel substrates
Either in good diffuse daylight or in equivalent artificial illumination, examine the steel
surface and compare it with each of the photographs (see clause 6), using normal
vision. Place the appropriate photograph close to, and in the plane of, the steel surface
to be assessed.
For rust grades, record the assessment as the worst grade that is evident. For prepara-
tion grades, record the assessment as that grade nearest in appearance to that of the
steel surface.
NOTES
1 In addition to the type of cleaning method used, for example dry blast-cleaning using a par-
:
ticular type of abrasive, the following factors can influence the result of the visual assessment
initial state of the steel surface other than any of the standard rust grades A, E, C and D;
a)
colour of the steel itself;
b)
c) regions of differing roughness, resulting from differential corrosion attack or uneven
removal of material;
surface irregularities such as dents;
d)
e) marks from tools;
f) uneven lighting;
g) shadowing of the surface profile caused by angled projection of abrasive;
h) embedded abrasives
2 For previously painted surfaces that have been prepared for renewed painting, only
D or C (for example : D Sa 21/2 or C Sa 27/21 may be
photographs with rust grade designations
used for the visual assessment. The choice (for example between D Sa 21/2 and C Sa 2V2)
depends on the degree of pitting.
7
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IS0 8501-1 : 1988 (E)
6 Photographs
Twenty-eight representative photographic examples for comparison with steel
substrates are appended.
These photographs, which are not magnified, are copies that have been reproduced by
a special technique whereby the colour print is applied to the back of plastics sheets.
To prevent the specimens from being scratched, paper leaves have been inserted
between the plastics sheets. For ease of manufacture, the plastics sheets do not carry
page numbers. For convenience in use, the photographs are displayed in the order
shown in the figure.
Four photographs relate specifically to the rust grades A, B, C and D (see clause 3).
Twenty-four photographs, A Sa 2% to D FI, relate specifically to the preparation
grades obtained by dry blast-cleaning, by hand and power tool cleaning, and by flame
cleaning (see clause 4). Other methods, such as wet blast-cleaning, produce surfaces
that may differ in appearance, colour, etc., but the photographs can still be used to
give an indication of the preparation grade.
A Sa 2112 to D Sa 3, show steel surfaces that have been sub-
Fourteen photographs,
jected to dry blast-cleaning with abrasives containing quartz sand. The use of such
abrasives in enclosed areas is prohibited in many countries except under strictly con-
trolled conditions. Therefore abrasives of other types (and hence colour) are often
used for dry blast-cleaning. These abrasives may produce a different surface appear-
ance, even after meticulous cleaning of the blast-cleaned surface.
There are no photographs representing A Sa 1, A Sa 2, A St 2 or A St 3 because
these preparation grades are not achievable and the existing photographs are suf-
ficiently indicative.
8
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IS0 8501-1 : 1988 (E)
Rust grades
Preparation grades
Blast-cleaning
Hand and power tool cleaning
Flame cleaning
Figure - Layout and sequence of the appended representative
photographic examples
9
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~~~~~
NORM E I NTE R NAT1 ON ALE IS0 8501-1 : 1988 (FI
Préparation des subjectiles d'acier avant application de
peintures et de produits assimilés - Évaluation visuelle de la
propreté d'un subjectile -
Partie 1 :
Degrés de rouille et degrés de préparation des subjectiles d'acier
non recouverts et des subjectiles d'acier ap,rès décapage sur toute la
surface des revêtements précédents
O Introduction
L'efficacité des revêtements de peintures et produits assimilés de protection appliqués
sur de l'acier est nettement affectée par I'état du subjectile juste avant l'application de
la peinture. Les principaux facteurs connus affectant cette efficacité sont
la présence de rouille et de calamine;
a)
la présence d'agents contaminants tels que sels, poussières, huiles et graisses;
b)
c) le profil de surface.
Les Normes internationales IS0 8501, IS0 8502 et IS0 8503 ont été élaborées afin de
fournir des méthodes pour évaluer ces facteurs, alors que I'ISO 8504 fournit des direc-
tives sur les méthodes de préparation existantes pour le nettoyage des subjectiles
d'acier avec les possibilités de chacune de parvenir aux niveaux de propreté spécifiés.
Ces Normes internationales ne proposent aucune recommandation pour les systhnes
de revêtement de protection à appliquer sur le subjectile d'acier. Elles ne proposent pas
non plus de recommandations quant aux exigences sur la qualité du subjectile dans des
cas particuliers, bien que ce facteur puisse avoir une influence directe sur le choix du
revêtement 8 appliquer et sur son efficacité. On trouvera de telles recommandations
dans d'autres documents tels que les normes nationales ou les codes d'utilisation. II
conviendra que les utilisateurs de ces Normes internationales s'assurent que les quali-
tés spécifiées sont
-
compatibles et adaptées tant B l'environnement auquel le subjectile sera
exposé qu'aux revêtements de protection à utiliser;
-
dans les limites des possibilités du mode de nettoyage spécifié.
11
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IS0 8501-1 : 1988 (FI
Les quatre Normes internationales auxquelles il est fait référence ci-dessus traitent des
aspects suivants de la préparation des subjectiles d‘acier :
IS0 8501 - Evaluation visuelle de la propreté d‘un subjectile;
IS0 8502 - Essais pour l’évaluation de la propreté d’un subjectile;
IS0 8503 - Caractéristiques de rugosité des subjectiles d’acier décapés;
IS0 8504 - Méthodes de préparation des surfaces.
Chacune de ces Normes internationales est A son tour divisée en parties séparées.
La présente partie de I’ISO 8501 identifie quatre niveaux (désignés par ((degrés de
rouille))) de calamine et de rouille couramment décelés sur les surfaces d’acier non
recouvert, monté ou en stock. Elle identifie également certains degrés de propreté
appréciables A l‘œil nu (désignés par ((degrés de préparation aprhs préparation des
subjectiles d’acier non recouverts et des subjectiles d’acier aprhs décapage sur toute la
surface des revêtements précédents. Ces degrés de propret6 appréciables A l’œil nu
sont relatifs aux méthodes classiques de nettoyage de surface utilisées avant I’applica-
tion de la, peinture.
La présente partie de I’ISO 8501 a pour but de fournir un outil pour l‘évaluation visuelle
des degrés de rouille et des degrés de préparation. Elle comporte 28 photographies
purement indicatives.
NOTES
1 Vingt-quatre de ces photographies proviennent de la norme suédoise SIS 05 59 00-1967,
Degrds de rouille des surfaces d‘acier et degr& de soins lors du traitement prdalable de ces sur-
faces pour la peinture anticorrosive, qui est remplacée par la présente partie de I’ISO 8501 (voir
annexe A). Les quatre autres photographies proviennent de la norme allemande DIN 55 928,
partie 4, supplhent 1 (août 1978). Protection de constructions d‘acier contre la corrosion par
application de couches organiques et revetements mdtalliques; prdparation et examen de sur-
faces; photographies de rdférence.
La norme SIS 05 59 O0 a été préparée par l’Institut suédois de la corrosion, en collaboration avec
I‘American Society for Testing and Materials (ASTM) et le Steel Structures Painting Council
(SSPC), USA. II existe un certain nombre de normes nationales inspirées de la norme suédoise,
partie 4 (1977), TGL 18730/02 (1977), DS 2019 (1967), AS 1627,
par exemple: DIN 55 928,
partie 9-1974, ASTM D 2200-67 (1980) et SSPC-Vis 1-82 T. D’autres normes ont également une
présentation similaire, par exemple JSRA SPSS-1975, mais elles sont moins largement utilisées
et n’ont donc pas été prises en considération.
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IS0 8501-1 : 1988 (F)
Les raisons qui ont conduità adopter les éléments essentiels de la norme SIS 05 59 00, y compris
son format, sont les suivantes :
a) la norme SIS 05 59 O0 est utilisée dans le monde entier;
b) la publication d’un nouveau jeu de photographies se serait révélée coûteuse et n’aurait
pas nécessairement introduit d’amélioration :
c) des documents préexistants et actuels concernant le présent systbme établi de degrés de
rouille et de degrés de préparation pourront toujours &re utilisés pa
...
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