EN ISO 2810:2004

SLOVENSKI STANDARD
01-april-2005
Barve in laki - Naravno staranje premazov - Izpostavitev in ocenjevanje (ISO
2810:2004)
Paints and varnishes - Natural weathering of coatings - Exposure and assessment (ISO
2810:2004)
Beschichtungsstoffe - Freibewitterung von Beschichtungen - Bewitterung und Bewertung
(ISO 2810:2004)
Peintures et vernis - Vieillissement naturel des revetements - Exposition et évaluation
(ISO 2810:2004)
Ta slovenski standard je istoveten z: EN ISO 2810:2004
ICS:
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 2810
Second edition
2004-07-01
Paints and varnishes — Natural
weathering of coatings — Exposure and
assessment
Peintures et vernis — Vieillissement naturel des revêtements —
Exposition et évaluation
Reference number
ISO 2810:2004(E)
©
ISO 2004
ISO 2810:2004(E)
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ii ISO 2004 – All rights reserved

ISO 2810:2004(E)
Contents Page
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 2
5 Exposure racks . 3
6 Apparatus for measurement of climatic factors . 4
7 Test specimens . 5
8 Procedure . 6
9 Supplementary test conditions . 6
10 Evaluation of properties . 7
11 Precision . 7
12 Test report . 7
Annex A (normative) Environment and climate . 8
Annex B (informative) Classification of climates . 10
Bibliography . 11
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ISO 2004 – All rights reserved iii

ISO 2810:2004(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 2810 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9,
General test methods for paints and varnishes.
This second edition cancels and replaces the first edition (ISO 2810:1974), which has been technically revised.
©
iv ISO 2004 – All rights reserved

INTERNATIONAL STANDARD ISO 2810:2004(E)
Paints and varnishes — Natural weathering of coatings —
Exposure and assessment
1Scope
This International Standard specifies the conditions which need to be taken into consideration in the selection
of the type of natural weathering and the natural weathering procedure to be used to determine the resistance
of coatings or coating systems (direct weathering or weathering behind window glass).
Natural weathering is used to determine the resistance of coatings or coating systems (denoted in the following
text simply by coatings) to the sun's radiation and the atmosphere.
Special atmospheric influences, e.g. industrial pollution, are not taken into account in this International
Standard.
2 Normative references
The following referenced documents are indispensable for the application 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 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2813, Paints and varnishes — Determination of specular gloss of non-metallic paint films at 20°, 60° and
85°
ISO 3668, Paints and varnishes — Visual comparison of the colour of paints
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and designation
system
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 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 — Part 5: Assessment of degree of flaking
ISO 4628-6, Paints 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
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ISO 2810:2004(E)
ISO 4628-7, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 7: Assessment of degree of chalking by
velvet method
ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of delamination
and corrosion around a scribe
ISO 4628-10, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size
of defects, and of intensity of uniform changes in appearance — Part 10: Assessment of degree of filiform
corrosion
ISO 7724-1, Paints and varnishes — Colorimetry — Part 1: Principles
ISO 7724-2, Paints and varnishes — Colorimetry — Part 2: Colour measurement
ISO 7724-3, Paints and varnishes — Colorimetry — Part 3: Calculation of colour differences
ISO 8565:1992, Metals and alloys — Atmospheric corrosion testing — General requirements for field tests
ISO 12944-2, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 2: Classification of environments
EN 13523-19, Coil coated metals — Test methods — Part 19: Panel design and method of atmospheric
exposure testing
SAE J1976:2002, Outdoor weathering of exterior materials
WMO, Guide to meteorological instruments and methods of observation, WMO Publication No. 8, sixth edition,
World Meteorological Organization, Geneva, 1996
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
durability
ability of a coating to resist the deleterious effect of its environment
3.2
time of wetness
period during which an exposed coating has visible water present on it
4 General
The durability of a coating during natural weathering depends on how, where and when the coating is
weathered. Therefore, these parameters and the intended use of the coating shall be taken into account when
exposures are carried out.
In particular, the following parameters shall be considered:
a) The location of the exposure site, for example industrial, marine, rural. In choosing sites, those which differ
markedly in the type or level of pollution from the normal shall be avoided, unless they are appropriate to the
intended end use of the coating under test.
b) The height, angle and orientation of the exposure rack. These parameters will govern the extent to which
the specimens are affected, for example by dew, frost and atmospheric pollutants.
c) The nature of the terrain on which the rack is constructed (for example concrete, grass, gravel). The terrain
may affect the climatic conditions around the specimen under test. It would rarely be feasible to select an
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ISO 2810:2004(E)
ideal terrain in practice, but the effect of such variations in climatic conditions will be minimized by ensuring
that all specimens are situated sufficiently high above the ground (see Clause 5).
d) Whether the performance of the coating on the front and/or the back of the specimen is of interest. Certain
types of degradation, for example rust formation and/or mould growth, are frequently more severe on the
sheltered parts of the specimen.
e) The intended use of the coating, including its substrate, and whether the coating is to be washed or polished
in service.
The results of tests on an exposure rack will apply precisely only to the environment in which they were
obtained.
Provided that the test conditions are reasonably appropriate to the intended end use, the relative performance
of a number of coatings tested at the same time will enable valid deductions to be drawn. It is recommended
that each series of specimens under evaluation include coatings of known performance to act as reference
standards.
The results of natural weathering may vary according to the time of year during which the tests are carried out.
The influence of these variations will be reduced if the exposure period is sufficiently long. The exposure period
should be at least one year, or a multiple of one year. The reproducibility of the results will be improved if the
exposure period always starts at the same time of year, preferably in spring.
Natural weathering tests are normally carried out for a fixed period of time. However, in many cases it is
preferable to define the test period in terms of a certain degree of degradation or by the radiant exposure
(dosage) of solar radiation to which the specimen is to be subjected (see Clause 6). The latter procedure may
reduce the influence of seasonal variations but does not eliminate it.
Radiant exposure may be determined by measurement of irradiance, and integration of the measurements over
the period of natural weathering.
The climatic conditions shall be monitored and a complete record reported, together with the other conditions of
weathering.
Care is required in the selection of test specimens of substrates with variable (anisotropic) properties, for
example wood or steel. In these cases, replication of the tests is essential if misl
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