Paints and varnishes - Natural weathering of coatings - Exposure and assessment (ISO 2810:2020)

This document specifies the conditions to take into consideration when selecting the type of natural
weathering and the natural weathering procedure 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 this
document by coatings) to the sun's radiation and the atmosphere.
This document does not take into account special atmospheric influences, e.g. industrial pollution.

Beschichtungsstoffe - Freibewitterung von Beschichtungen - Bewitterung und Bewertung (ISO 2810:2020)

Dieses Dokument legt diejenigen Bedingungen fest, die für die Art und Durchführung der Freibewitterung (direktes Bewittern oder hinter Fensterglas) zur Prüfung der Beständigkeit von Beschichtungen berücksichtigt werden müssen.
Die Freibewitterung wird angewendet, um die Beständigkeit von Beschichtungen und Beschichtungssystemen (in diesem Dokument kurz Beschichtungen genannt) gegen die Einwirkungen der Sonnenstrahlung und der Atmosphäre zu bestimmen.
Spezielle atmosphärische Einflüsse, z. B. durch industrielle Verunreinigungen, werden in diesem Dokument nicht berücksichtigt.

Peintures et vernis - Vieillissement naturel des revêtements - Exposition et évaluation (ISO 2810:2020)

Le présent document spécifie les conditions à prendre en considération lors du choix du type et de la méthode d'exposition au vieillissement naturel, afin de déterminer la résistance des revêtements et des systèmes de peinture (vieillissement direct ou derrière une vitre).
Le vieillissement naturel est utilisé pour déterminer la résistance des revêtements ou systèmes de peinture (désignés dans le présent document simplement «revêtements») au rayonnement solaire et à l'atmosphère.
Le présent document ne prend pas en compte les influences atmosphériques particulières, par exemple la pollution industrielle.

Barve in laki - Naravno staranje premazov - Izpostavljanje in ocenjevanje (ISO 2810:2020)

General Information

Status
Published
Public Enquiry End Date
02-Feb-2020
Publication Date
08-Oct-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Oct-2020
Due Date
06-Dec-2020
Completion Date
09-Oct-2020

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SLOVENSKI STANDARD
SIST EN ISO 2810:2020
01-november-2020
Nadomešča:
SIST EN ISO 2810:2005
Barve in laki - Naravno staranje premazov - Izpostavljanje in ocenjevanje (ISO
2810:2020)

Paints and varnishes - Natural weathering of coatings - Exposure and assessment (ISO

2810:2020)

Beschichtungsstoffe - Freibewitterung von Beschichtungen - Bewitterung und Bewertung

(ISO 2810:2020)

Peintures et vernis - Vieillissement naturel des revêtements - Exposition et évaluation

(ISO 2810:2020)
Ta slovenski standard je istoveten z: EN ISO 2810:2020
ICS:
87.040 Barve in laki Paints and varnishes
SIST EN ISO 2810:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 2810:2020
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SIST EN ISO 2810:2020
EN ISO 2810
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 2810:2004
English Version
Paints and varnishes - Natural weathering of coatings -
Exposure and assessment (ISO 2810:2020)

Peintures et vernis - Vieillissement naturel des Beschichtungsstoffe - Freibewitterung von

revêtements - Exposition et évaluation (ISO Beschichtungen - Bewitterung und Bewertung (ISO

2810:2020) 2810:2020)
This European Standard was approved by CEN on 28 August 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2810:2020 E

worldwide for CEN national Members.
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SIST EN ISO 2810:2020
EN ISO 2810:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 2810:2020
EN ISO 2810:2020 (E)
European foreword

This document (EN ISO 2810:2020) has been prepared by Technical Committee ISO/TC 35 "Paints and

varnishes" in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the

secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall

be withdrawn at the latest by March 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 2810:2004.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 2810:2020 has been approved by CEN as EN ISO 2810:2020 without any modification.

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SIST EN ISO 2810:2020
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SIST EN ISO 2810:2020
INTERNATIONAL ISO
STANDARD 2810
Third edition
2020-09
Paints and varnishes — Natural
weathering of coatings — Exposure
and assessment
Peintures et vernis — Vieillissement naturel des revêtements —
Exposition et évaluation
Reference number
ISO 2810:2020(E)
ISO 2020
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SIST EN ISO 2810:2020
ISO 2810:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 2810:2020
ISO 2810:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General ............................................................................................................................................................................................................................ 1

5 Exposure racks ....................................................................................................................................................................................................... 2

6 Apparatus for measurement of climatic factors .................................................................................................................. 3

6.1 Measurement of solar radiation ............................................................................................................................................... 3

6.1.1 Pyranometers ..................................................................................................................................................................... 3

6.1.2 Pyrheliometers .................................................................................................................................................................. 3

6.1.3 Total-ultraviolet radiometers................................................................................................................................ 4

6.1.4 Narrow-band ultraviolet radiometers ........................................................................................................... 4

6.2 Other climate-measuring instruments ............................................................................................................................... 4

7 Test specimens........................................................................................................................................................................................................ 4

8 Procedure..................................................................................................................................................................................................................... 5

9 Supplementary test conditions ............................................................................................................................................................. 5

10 E valuation of properties ............................................................................................................................................................................... 6

11 Precision ....................................................................................................................................................................................................................... 6

12 Test report ................................................................................................................................................................................................................... 6

Annex A (normative) Environment and climate ....................................................................................................................................... 8

Annex B (informative) Classification of climates ..................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................12

© ISO 2020 – All rights reserved iii
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SIST EN ISO 2810:2020
ISO 2810:2020(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee

SC 9, General test methods for paints and varnishes, in collaboration with the European Committee for

Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the

Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 2810:2004), which has been technically

revised. The main changes compared to the previous edition are as follows:

— in Clause 4, the list in b) has been amended by radiant exposure and temperature;

— the time of wetness has been deleted from the list of additional observations on climate in A.2 and

replaced by a note with the reference to ASTM Practice G84;
— the climate classification in Annex B has been updated to ISO 877-1:2009;

— the text has been editorially revised and the normative references have been updated.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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SIST EN ISO 2810:2020
INTERNATIONAL STANDARD ISO 2810:2020(E)
Paints and varnishes — Natural weathering of coatings —
Exposure and assessment
1 Scope

This document specifies the conditions to take into consideration when selecting the type of natural

weathering and the natural weathering procedure 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 this

document by coatings) to the sun's radiation and the atmosphere.

This document does not take into account special atmospheric influences, e.g. industrial pollution.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 4618, Paints and varnishes — Terms and definitions

WMO Publication No, 8, Guide to meteorological instruments and methods of observation, World

Meteorological Organization, Geneva, 2012
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
durability
ability of a specimen to resist the deleterious effect of its environment
3.2
time of wetness
period during which an exposed coating has surface moisture 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.
© ISO 2020 – All rights reserved 1
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SIST EN ISO 2810:2020
ISO 2810:2020(E)
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 govern the extent to

which the specimens are affected, for example by radiant exposure, temperature, 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 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 shaded 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 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 enables 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 is 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

is 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 can reduce the influence of seasonal variations but does not eliminate it.

Radiant exposure can 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 shall be 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 to avoid misleading results.

Washing and polishing during exposure affects the durability of the coating. It shall therefore be

mentioned in the test report.
5 Exposure racks

Unless otherwise specified or agreed, use exposure racks on which the specimens are facing towards

the equator. The specimens shall be firmly held on the racks by attachments made of stainless steel or

other corrosion-resistant material, in such a manner that they are mechanically stressed as little as

possible.
2 © ISO 2020 – All rights reserved
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SIST EN ISO 2810:2020
ISO 2810:2020(E)

The exposure racks shall be constructed so that the atmosphere has free access to the specimens and

that water that drains from one specimen does not drain onto another. In addition, the racks can be

designed so that a portion of the specimens can be covered to allow evaluation between an exposed and

a masked area. By using special devices, particular conditions may be simulated, for example by using a

“black box” in accordance with SAE J 1976 to simulate automotive conditions or backing the test panel

with plywood or other insulation material to simulate building side wall or roof area conditions.

Metal substrates for corrosion tests shall not be in electrical contact with metals during the exposure

period or, as far as possible, in direct contact with wood or other porous materials. If specimens are

supported in grooves, suitable drainage holes shall be provided to prevent accumulation of water.

Unless otherwise stated, the racks shall be constructed so that all specimens are supported either at a

minimum height of 0,45 m above the ground or at a height sufficient to avoid contact with vegetation

and to prevent damage.

The area beneath and in the vicinity of the racks shall be characterized by low reflectance and by

ground cover typical of that climatological area. In desert areas, the racks shall be located on gravel, in

most temperate areas on low-cut grass.

Usually the panels are supported at an angle of 45° to the horizontal. Depending on the intended end

use of the coating, other angles may be agreed, for example 5° for automotive finishes or roof coatings,

or vertical exposure for textured wall finishes.

NOTE When testing corrosion performance, it is appropriate to expose specimens vertically facing away

from the equator as well as inclined at 45° and 5° facing towards the equator (see EN 13523-19).

Specimens facing away from the equator will remain wet for longer periods since they dry less rapidly

than those exposed facing towards the equator. This leads to a higher tendency to corrode.

The racks shall be situated so that, at a sun height of 20° and more, no shadow falls on to the specimens.

When testing the durability of coatings for interior use which are exposed to radiation which has

passed
...

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