SIST EN ISO 11997-1:2006

SLOVENSKI STANDARD
SIST EN ISO 11997-1:2006
01-april-2006
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Paints and varnishes - Determination of resistance to cyclic corrosion conditions - Part 1:
Wet (salt fog)/dry/humidity (ISO 11997-1:2005)
Beschichtungsstoffe - Bestimmung der Beständigkeit bei zyklischen
Korrosionsbedingungen - Teil 1: Nass (Salzsprühnebel)/trocken/Feuchte (ISO 11997-
1:2005)
Peintures et vernis - Détermination de la résistance aux conditions de corrosion cyclique
- Partie 1: Brouillard salin/sécheresse/humidité (ISO 11997-1:2005)
Ta slovenski standard je istoveten z: EN ISO 11997-1:2006
ICS:
87.040 Barve in laki Paints and varnishes
SIST EN ISO 11997-1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11997-1:2006

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SIST EN ISO 11997-1:2006
EUROPEAN STANDARD
EN ISO 11997-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2006
ICS 87.040

English Version
Paints and varnishes - Determination of resistance to cyclic
corrosion conditions - Part 1: Wet (salt fog)/dry/humidity (ISO
11997-1:2005)
Peintures et vernis - Détermination de la résistance aux Beschichtungsstoffe - Bestimmung der Beständigkeit bei
conditions de corrosion cyclique - Partie 1: Brouillard zyklischen Korrosionsbedingungen - Teil 1: Nass
salin/sécheresse/humidité (ISO 11997-1:2005) (Salzsprühnebel)/trocken/Feuchte (ISO 11997-1:2005)
This European Standard was approved by CEN on 16 January 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11997-1:2006: E
worldwide for CEN national Members.

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SIST EN ISO 11997-1:2006
EN ISO 11997-1:2006 (E)






Foreword



The text of ISO 11997-1:2005 has been prepared by Technical Committee ISO/TC 35 "Paints
and varnishes” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 11997-1:2006 by 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 August 2006, and conflicting national
standards shall be withdrawn at the latest by August 2006.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.



Endorsement notice

The text of ISO 11997-1:2005 has been approved by CEN as EN ISO 11997-1:2006 without any
modifications.

2

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SIST EN ISO 11997-1:2006


INTERNATIONAL ISO
STANDARD 11997-1
Second edition
2005-03-15

Paints and varnishes —
Determination of resistance to cyclic
corrosion conditions —
Part 1:
Wet (salt fog)/dry/humidity
Peintures et vernis — Détermination de la résistance aux conditions de
corrosion cyclique —
Partie 1: Brouillard salin/sécheresse/humidité




Reference number
ISO 11997-1:2005(E)
©
ISO 2005

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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(E)
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ii © ISO 2005 – All rights reserved

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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Principle . 2
4 Required supplementary information . 2
5 Salt fog test solution. 2
6 Apparatus. 3
7 Sampling . 4
8 Test panels . 4
9 Method of exposure of test panels. 5
10 Operating conditions . 5
11 Procedure. 5
12 Examination of test panels. 6
13 Precision . 6
14 Test report. 6
Annex A (normative) Required supplementary information . 8
Annex B (informative) Factors to be considered in the design and construction of salt spray
cabinets. 9
Annex C (normative) Cycle A . 10
Annex D (normative) Cycle B . 11
Annex E (normative) Cycle C . 12
Annex F (normative) Cycle D. 13

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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(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 11997-1 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 11997-1:1998) (including Technical
Corrigendum ISO 11997-1:1998/Cor.1:1998), in which cycle A has been revised and cycle D has been added
to correlate with ISO 14993:2001, Corrosion of metals and alloys — Accelerated testing involving cyclic
exposure to salt mist, “dry” and “wet” conditions.
ISO 11997 consists of the following parts, under the general title Paints and varnishes — Determination of
resistance to cyclic corrosion conditions:
 Part 1: Wet (salt fog)/dry/humidity
 Part 2: Wet (salt fog)/dry/humidity/UV light
iv © ISO 2005 – All rights reserved

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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(E)
Introduction
Coatings of paints, varnishes and similar materials are exposed to one of four cycles of wet and dry conditions
using specified salt solutions in a cabinet in order to simulate, in the laboratory, processes occurring in
aggressive outdoor conditions, such as marine environments. Generally, correlation between such outdoor
weathering and laboratory testing cannot be expected because of the large number of factors influencing the
breakdown process. Correlation can only be expected if the effect on the coating of important parameters (e.g.
the nature of the pollutant, the spectral distribution of the incident irradiance in the relevant photochemical
region, the temperature of the specimen, the type and cycle of wetting and relative humidity) is known. In
contrast to outdoor weathering, laboratory testing in a cabinet is performed with a reduced number of
variables which can be controlled, and therefore the effects are more reproducible. The method described
may also give a means of checking that the quality of a paint or paint system is being maintained.
The method has been found to be useful in comparing the cyclic salt spray resistance of different coatings. It
is most useful in providing relevant ratings for a series of coated panels exhibiting significant differences in
cyclic salt spray resistance.
The test cycles included in this part of ISO 11997 have been used successfully, with documented evidence, in
the industry for the assessment of performance. The cycles can be summarized as follows.
 Cycle A (see Annex C): This cycle is specified in Japanese Automobile Standards JASO M 609-91,
Corrosion test method for automotive materials, and JASO M610-92, Cosmetic corrosion test method for
automotive parts.
 Cycle B (see Annex D): This is based on the VDA 621-415 cycle and is widely used in Europe. It has
also been shown to give good correlation with natural weathering for thermosetting paints in vehicle
corrosion.
 Cycle C (see Annex E): This cycle was developed in the UK for use with water-soluble and latex paint
systems, and has been shown to give good correlation with natural weathering.
 Cycle D (see Annex F): This cycle is specified in Japanese Standard JIS K 5621-2003, Anticorrosive
paint for general use.
It is intended that other cycles will be added at later revisions of this part of ISO 11997, as they are developed
for evaluating other paint types.
ISO 11997-2 describes a method for determining the cyclic corrosion resistance of paints which includes UV
exposure as part of the cycle. It has been found to give good correlation with natural weathering for industrial
maintenance coatings.

© ISO 2005 – All rights reserved v

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SIST EN ISO 11997-1:2006

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SIST EN ISO 11997-1:2006
INTERNATIONAL STANDARD ISO 11997-1:2005(E)

Paints and varnishes — Determination of resistance to cyclic
corrosion conditions —
Part 1:
Wet (salt fog)/dry/humidity
1 Scope
This part of ISO 11997 describes a method for the determination of the resistance of coatings to one of four
defined cycles of wet (salt fog)/dry/humidity conditions using specified solutions.
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 1513, Paints and varnishes — Examination and preparation of samples for testing
ISO 1514, Paints and varnishes — Standard panels for testing
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and
testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4628-1, Paints and varnishes — Evaluation of degradation of paint 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 paint 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 paint 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 paint 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 paint coatings — Designation of quantity
and size of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of
flaking
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(E)
3 Principle
A coated test panel is exposed to a cyclic wet (salt fog), drying and humidity test schedule and the effects of
exposure are evaluated by criteria agreed in advance between the interested parties, these criteria usually
being of a subjective nature.
4 Required supplementary information
For any particular application, the test method described in this part of ISO 11997 needs to be completed by
the supplementary information given in Annex A.
5 Salt fog test solution
Prepare the salt fog test solution by dissolving the salt or salts as given in Annexes C, D, E and F in water
conforming to at least grade 2 of ISO 3696, to produce the required concentration.
The salts shall be of analytical grade or visually white, and conform with the purity requirements given in
Table 1.
Table 1 — Purity of salts
Maximum mass
fraction of impurity
Impurity Method of determination
%
Total 0,5 Calculated as a percentage of the dry salt
Iodide 0,1 Calculated as a percentage of the dry salt
Copper 0,001 Determined by spectrophotometry or another method of similar accuracy
Nickel 0,001 Determined by spectrophotometry or another method of similar accuracy

If the pH of the solution is outside the required range (see Annexes C, D, E and F), the presence of
undesirable impurities in the salt or the water or both shall be investigated. The pH determination shall be
based on electrometric measurement at 25 °C, but a narrow-range indicator paper which can be read in
increments of 0,3 pH-units or less and which has been calibrated against electrometric measurements may be
used in routine checks. Any necessary corrections shall be made by adding hydrochloric acid, sodium
hydrogen carbonate (both of purity conforming to the requirements of Table 1) or analytical-grade sodium
hydroxide, of appropriate concentrations.
NOTE Attention is drawn to the possible changes in pH resulting from loss of carbon dioxide from the solution when it
is sprayed, or from dissolution of carbon dioxide from the ambient atmosphere. Such changes may be avoided by
reducing the carbon dioxide content of the solution by, for example, heating it to a temperature above 35 °C before it is
placed in the cabinet or making the solution from freshly boiled water.
Filter the solution before placing it in the reservoir of the cabinet, in order to remove any solid matter which
might block the apertures of the spraying device.
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SIST EN ISO 11997-1:2006
ISO 11997-1:2005(E)
6 Apparatus
Ordinary laboratory apparatus and glassware, together with the following:
6.1 Spray cabinet, made of, or lined with, material resistant to corrosion by the sprayed solution and
having a roof which prevents condensed moisture dripping onto the test specimens. The cabinet shall have a
3
capacity of not less than 0,4 m in order to ensure even distribution of the spray.
The size and shape of the cabinet shall be such that the salt fog deposition rate is within the limits given in
Annexes C, D, E and F.
3
NOTE Cabinets with a volume greater than 2 m will be difficult to operate unless careful consideration is given to
their design and construction.
Factors to be taken into consideration in the design and construction of the cabinet are given in Annex B.
If the cabinet has been used for a spray test, or for any other purpose, using a solution differing from that
specified for the current test cycle, it shall be thoroughly cleaned before use.
6.2 Hot-air blowers, capable of maintaining the cabinet and its contents at the specified temperatures and
achieving the required heating rates (see Annexes C, D, E and F). The temperature shall be controlled by a
thermostat element placed within the cabinet at least 100 mm from the walls of the cabinet.
6.3 Means for spraying the salt solution, comprising a supply of clean compressed air at a controlled
pressure, a reservoir to contain the solution to be sprayed, and one or more atomizers made of material
resistant to the solution. The compressed-air supply to each atomizer shall be passed through a filter to
remove all traces of oil or solid matter, shall be at a suitable pressure depending upon the type of atomizer
nozzle and shall be adjusted so that the rate of collection of spray in the cabinet and the concentration of the
collected spray are ke
...