SIST EN ISO 8503-3:1997
(Main)Preparation of steel substrates before application of paints and related products - Surface roughness characteristics of blast-cleaned steel substrates - Part 3: Method for the calibration of ISO surface profile comparators and for the determination of surface profile - Focusing microscope procedure (ISO 8503-3:1988)
Preparation of steel substrates before application of paints and related products - Surface roughness characteristics of blast-cleaned steel substrates - Part 3: Method for the calibration of ISO surface profile comparators and for the determination of surface profile - Focusing microscope procedure (ISO 8503-3:1988)
Based on observation of the test surface over a specified field of view, focussing the highest peaks and lowest valleys by movement of the objective. Determination of the distance (peak-to-valley height) between the highest peak and lowest valley by movement of the objective in order to focus on the lowest valley within the same field of view. Repetition of the procedure to obtain values for a further 19 different fields of view, calculation of the arithmetic mean. The focussing microscope is also specified. The procedure is also applicable to the determination of the surface profile of essentially planar blast-cleaned steel.
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Rauheitskenngrößen von gestrahlten Stahloberflächen - Teil 3: Verfahren zur Kalibrierung von ISO-Rauheitsvergleichsmustern und zur Bestimmung der Rauheit - Mikroskopverfahren (ISO 8503-3:1988)
Dieser Teil von ISO 8503 legt die Anforderungen an das fokussierbare Mikroskop fest und beschreibt das Verfahren zur Kalibrierung von ISO-Rauheitsvergleichsmustern, welche den Anforderungen nach ISO 8503-1 entsprechen.
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Caractéristiques de rugosité des subjectiles d'acier décapés - Partie 3: Méthode pour étalonner les échantillons de comparaison viso-tactile ISO et pour caractériser un profil de surface - Utilisation d'un microscope optique (ISO 8503-3:1988)
1.1 La présente partie de l'ISO 8503 décrit le microscope optique et la méthode pour étalonner les échantillons de comparaison viso-tactile ISO répondant aux exigences de l'ISO 8503-1. 1.2 La présente partie de l'ISO 8503 est également applicable à la détermination d'un profil de surface hy, dans la gamme de 20 à 200 µm, d'une surface essentiellement plane décapée par projection d'abrasif. La détermination peut être effectuée sur une partie représentative de la surface préparée ou, si l'observation directe n'est pas possible, sur une réplique (voir annexe E).
NOTE -- Dans certains cas, ce mode opératoire peut convenir pour évaluer le profil de rugosité d'autres subjectiles décapés par projection d'abrasif. Une autre méthode est décrite dans l'ISO 8503-4.
Priprava jeklenih podlag pred nanašanjem barvnih in sorodnih premazov - Površinske hrapave značilnosti peskanih jeklenih podlag - 3. del: Metoda za kalibracijo lestvice standardov površinske hrapavosti ISO in za določanje hrapavosti površine - Mikroskopski postopek (ISO 8503-3:1988)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 8503-3:1997
01-december-1997
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Preparation of steel substrates before application of paints and related products -
Surface roughness characteristics of blast-cleaned steel substrates - Part 3: Method for
the calibration of ISO surface profile comparators and for the determination of surface
profile - Focusing microscope procedure (ISO 8503-3:1988)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Rauheitskenngrößen von gestrahlten Stahloberflächen - Teil 3: Verfahren zur
Kalibrierung von ISO-Rauheitsvergleichsmustern und zur Bestimmung der Rauheit -
Mikroskopverfahren (ISO 8503-3:1988)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Caractéristiques de rugosité des subjectiles d'acier décapés - Partie 3:
Méthode pour étalonner les échantillons de comparaison viso-tactile ISO et pour
caractériser un profil de surface - Utilisation d'un microscope optique (ISO 8503-3:1988)
Ta slovenski standard je istoveten z: EN ISO 8503-3:1995
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
SIST EN ISO 8503-3:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 8503-3:1997
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SIST EN ISO 8503-3:1997
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SIST EN ISO 8503-3:1997
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SIST EN ISO 8503-3:1997
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SIST EN ISO 8503-3:1997
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SIST EN ISO 8503-3:1997
ISO
INTERNATIONAL STANDARD
8503-3
First edition
1988-02-0 1
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEX/JYHAPOflHAR OPTAHM3A~MR I-IO CTAHflAPTM3A~MM
Preparation of steel Substrates before application of
paints and related products’- Surface roughness
characteristics of blast-cleaned steel Substrates -
Part 3 :
Method for the calibration of ISO surface Profile
comparators and for the determination of surface Profile -
Focusing microscope procedure
Frkpara tion des subjectiles d’acier a van t applica tion de pein tures et de produits assimilk -
Caractkistiques de rugositb des subjectiles d’acier dkcapks -
Partie 3 : Mbthode pour ktalonner /es kchantif/ons de comparaison viso-tacti/e /SO et pour
caractgriser un Profil de surface - Utilisation d’un microscope optique
I Reference number
ISO 8503-3 : 1988 (E)
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SIST EN ISO 8503-3:1997
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. Esch 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, govern-
mental 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 ISO Council. They are approved in accotdance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 8503-3 was prepared by Technical Committee ISO/TC 35,
Pain ts and varnishes.
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.
Internationai Organkation for Standardkation, 1988
0
Printed in Switzerland
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SIST EN ISO 8503-3:1997
INTERNATIONAL STANDARD ISO 8503-3 : 1988 (El
Preparation of steel Substrates before application of
paints and related products - Surface roughness
characteristics of blast-cleaned steel Substrates -
Part 3 :
Method for the calibration of ISO surface Profile
comparators and for the determination of surface Profile -
Focusing microscope procedure
ISO 8502 - Tests for the assessment of surface clean-
0 Introduction
liness;
The petformance of protective coatings of paint and related
ISO 8503 - Surface roughness characteristics of blast-
products applied to steel is significantly affected by the state of
cleaned steel Substrates;
the steel surface immediately Prior to painting. The principal
factors that are known to influence this Performance are
ISO 8504 - Surface prepara tion me thods.
a) the presence of rust and mill scale;
Esch of these International Standards is in turn divided into
separate Parts.
b) the presence of surface contaminants, including salts,
dust, oils and greases;
The Optical microscope is one of the most widely used in-
struments for measuring surface Profile. The method tan be
c) the surface Profile.
used by any laboratory equipped with a good microscope that
has a calibrated focusing mechanism meeting the requirements
International Standards ISO 8501, ISO 8502 and ISO 8503 have
of 5.1. This procedure may also be used to determine the pro-
been prepared to provide methods of assessing these factors,
file of a Substrate after abrasive blast-cleaning either directly or
while ISO 8504 provides guidance on the preparation methods
from a replica.
that are available for cleaning steel Substrates, indicating the
capabilities of each in attaining specified levels of cleanliness.
This method is based on that developed in the USA by the
Steel Structures Painting Council. lt entails averaging a series
These International Standards do not contain recommenda-
of maximum peak-to-valley measurements obtained by focus-
tions for the protective coating Systems to be applied to the
ing a specified microscope
- first on the highest peak and then
steel surface. Neither do they contain recommendations for the
on the lowest valley in the same field of view, noting the
surface quality requirements for specific situations even though
distance of movement of the Stage (or objective).
surface quality tan have a direct influence on the choice of
protective coating to be applied and on its Performance. Such
This method has the disadvantage of requiring a series of
recommendations are found in other documents such as
tedious measurements, but good precision and agreement be-
national Standards and Codes of practice. lt will be necessary
tween laboratories and between Operators tan be obtained by
for the users of these International Standards to ensure that the
specifying closely the field of view and depth of field of the
qualities specified are
microscope. To avoid a widespread divergente in measuring
- Profile within and between laboratories, this method requires a
compatible and appropriate both for the environmental
significant number of measurements as well as correct calibra-
conditions to which the steel will be exposed and for the
tion, proper focus movement, standardized depth of field and
protective coating System to be used;
field diameter of the microscope necessary to measure properly
-
within the capability of the cleaning procedure speci- both coarse and fine profiles under a Single set of conditions.
fied.
ISO 8503-4 describes the procedure using a stylus instrument.
ISO 8503-1 specifies the requirements for ISO surface Profile
The four International Standards referred to above deal with
comparators and ISO 8503-2 describes their use. The many
the following aspects of preparation of steel Substrates :
abrasive blast-cleaning procedures in common use are describ-
ISO 8501 - Visual assessment of surface cleanliness; ed in ISO 8504-2.
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SIST EN ISO 8503-3:1997
ISO 8503-3 : 1988 (E)
5 Apparatus
1 Scope and field of application
5.1 Optical microscope, having a fine focus adjustment
1.1 This part of ISO 8503 specifies the focusing microscope
with little or no backlash (play) (sec clause A.5 in annex A). The
and describes the procedure for calibrating ISO surface Profile
adjustment shall give fine control of the movement of the ob-
comparators complying with the requirements of ISO 8503-1.
jective or Stage and shall be fitted with a graduated vernier scale
having a scale value of not more than 1 Pm. The microscope
1.2 This part of ISO 8503 is also applicable to the determina-
shall have an objective lens with a numerical aperture of not
tion of the surface Profile, within the range h, = 20 to 200 Pm,
less than 0,5 together with an eyepiece lens to give a field of
of essentially planar blast-cleaned steel. The determination may
view greater than 0,5 mm in diameter. The field of view may be
be carried out on a representative section of the blast-cleaned
reduced by the use of a circular eyepiece reticle or by a stop in
Substrate or, if direct Observation of the surface is not feasible,
the lamphouse.
on a replica of the surface (see annex E).
NOTE - Advice concerning the use of the microscope is given in
NO TE - Where appropriate, this proce dure may be u sed for assessi
Fl
annexes A and D. Annex A describes a procedure for determining the
blast-cleaned Substrates.
the roughness Profile of other abrasive
microscope backlash. Annex D explains the significance of the defined
variables for the microscope. (See also the note to 5.2.)
An alternative procedure is described in ISO 8503-4.
5.2 Light Source, fitted to the microscope (5.1) to illuminate
2 References the test surface perpendicular to its plane. Light filters may be
used to minimize glare.
ISO 4618, Paints and varnishes - Vocabulary.
NOTE - These requirements for the apparatus (5.1 and 5.2) are
ISO 8503, Preparation of steel Substrates before application of generally met by microscopes for metallurgical purposes.
paints and related products - Surface roughness character-
is tics of blast- cleaned s teel Substrates
6 Test surfaces
-
Part I : Specifications and definitions for ISO surface
Profile comparators for the assessment of abrasive blast-
6.1 ISO surface Profile comparator
cleaned surfaces.
Visually check that each Segment of the ISO surface Profile
-
Part 2 : Method for the grading of surface Profile of
comparator (see ISO 8503-1) that is to be calibrated is un-
abrasive blast-cleaned steel - Comparator procedure.
damaged. Lightly clean the surface with a dry, fine brPstle brush
to remove any particles of dust and then, using a similar brush,
-
Part 4 : Method for the calibration of ISO surface
wash the surface with Petroleum spirit, 4W60 (commercial
Profile comparators and for the determination of surface
grade), to remove oil and grease residues. Allow to dry before
Profile - S tylus ins trumen t procedure.
carrying out the calibration.
ISO 8504-2, Preparation of steelsubstrates before application of
Calibrate each Segment of the comparator as described in
paints and related products - Surface preparation methods -
clause 7.
Part 2 : Abrasive blast-cleaning. 1 )
6.2 Blast-cleaned steel substratesheplica
3 Definitions
Visually check that the surface that is to be measured is un-
For the purpose of this part of ISO 8503, the definitions given in
damaged. Lightly clean the surface with a dry, fine bristle brush
ISO 4618 and ISO 8503-1 apply.
to remove any particles of dust and then, using a similar brush,
wash the surface with Petroleum spirit, 40/60 (commercial
grade), to remove oil and grease residues. Aliow to dry before
4 Principle
carrying out the procedure.
Observation of the test surface over a specified field of view
Determine the surface Profile as described in clause 7.
using a specified microscope. Adjustment of the microscope,
N OTE - If a replica (sec annex E) is to be measured, clean it only with
by movement of the objective (or the Stage), to focus on the
a dry brush
highest peak within the field of view. Determination of the
distance h, moved by the objective (or the Stage) in Order to
focus on the lowest valley within the same field of view.
7 Procedure for measurement of maximum
peak-to-valley height h,
7.1 Locate the test surface (clause 6) under the objective of
the microscope (5.1) so that the measurements are taken on a
test area not less than 5 mm from any edge. Adjust the light
1) At present at the Stage of draft.
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SIST EN ISO 8503-3:1997
ISO 8503-3 : 1988 (E)
8.2 If the method is used to calibrate an ISO surface Profile
Source (5.2) to illumina te the test area, normal to the plane of
comparator and if the Standard deviation obtained is more than
the surface. Fo lcus the microscope approximately on the sur-
face. one-third of the mean result, repeat the procedure (clause 7),
and obtain the mean and Standard deviation for the 40
readings. If the Standard deviation is still more than one-third sf
7.2 Raise the objective until no part of the test area is in focus
the mean, reject the comparator as the Profile is of inadequate
(sec the notes). Then slowly lower the objective, using the fine
uniformity.
adjustment knob, until the first Point in the observed area just
Comes into focus. On the form given in annex C, record the
reading rl on the vernier scale as the height of the highest peak 8.3 If the method is used to determine the Profile of a blast-
in
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