EN ISO 9466:2025

SLOVENSKI STANDARD
01-april-2025
Železniške naprave - Premazovanje železniških potniških vozil (ISO 9466:2025)
Railway Applications - Coating of passenger rail vehicle (ISO 9466:2025)
Bahnanwendungen - Lackierung von Schienenfahrzeugen für den Personenverkehr
(ISO 9466:2025)
Applications ferroviaires - Peinturage des véhicules ferroviaires destinés au transport de
passagers (ISO 9466:2025)
Ta slovenski standard je istoveten z: EN ISO 9466:2025
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9466
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 45.060.01
English Version
Railway Applications - Coating of passenger rail vehicle
(ISO 9466:2025)
Applications ferroviaires - Peinturage des véhicules Bahnanwendungen - Lackierung von
ferroviaires destinés au transport de passagers (ISO Schienenfahrzeugen für den Personenverkehr (ISO
9466:2025) 9466:2025)
This European Standard was approved by CEN on 5 January 2025.

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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9466:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9466:2025) has been prepared by Technical Committee ISO/TC 269 "Railway
applications" in collaboration with Technical Committee CEN/TC 256 “Railway applications” 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 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
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.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 9466:2025 has been approved by CEN as EN ISO 9466:2025 without any modification.

International
Standard
ISO 9466
First edition
Railway applications — Coating of
2025-01
passenger rail vehicles
Applications ferroviaires — Peinturage des véhicules ferroviaires
destinés au transport de passagers
Reference number
ISO 9466:2025(en) © ISO 2025
ISO 9466:2025(en)
© ISO 2025
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 9466:2025(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms and symbols . 3
3.1 Terms and definitions .3
3.2 Abbreviated terms and symbols.4
3.2.1 Abbreviated terms .4
3.2.2 Symbols.4
4 Coating systems, locations and environment and design recommendations . 5
4.1 General .5
4.2 Types of locations .5
4.3 Standard support and substrates .5
4.4 Coating system qualification .6
4.4.1 General .6
4.4.2 Chemical and physiochemical characteristics of products for each layer .6
4.4.3 Application properties of products .8
4.4.4 Physical characteristics of products .10
4.4.5 Decorative characteristics . 13
4.4.6 Mechanical characteristics . 15
4.4.7 Ageing characteristics .18
4.5 Design recommendations .24
4.5.1 General .24
4.5.2 Coated parts specifications .24
5 Process establishment and qualification .24
5.1 General .24
5.2 Establishing the process steps . 25
5.2.1 General . 25
5.2.2 Ambient conditions . 25
5.2.3 Cleaning and degreasing the surface . 25
5.2.4 Pretreatment and surface preparation methods . 25
5.2.5 Coating application .27
5.2.6 Drying .27
5.2.7 Inter-operation time . 28
5.3 Process qualification . 28
5.3.1 General . 28
5.3.2 Tests for process qualification . 28
5.3.3 Process qualification report . 29
5.4 Supplier process information . 30
6 Serial production .30
6.1 General . 30
6.2 First article inspection . 30
6.3 Local work instruction document . 30
6.4 In-house testing of serial parts .32
6.4.1 General .32
6.4.2 Technical tests (valid for all location) . 33
6.4.3 Decorative locations . 34
6.4.4 Traceability requirements .37
6.5 Repair and maintenance .37
6.5.1 Repair .37
6.5.2 Maintenance .37
Annex A (informative) Proposed graffiti products and graffiti remover .38

iii
ISO 9466:2025(en)
Annex B (informative) Duration level related to the refurbishment time for corrosion, humidity
and weathering tests .39
Bibliography .40

iv
ISO 9466:2025(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 269, Railway applications, Subcommittee SC 2,
Rolling stock, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 256, Railway applications, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
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.

v
International Standard ISO 9466:2025(en)
Railway applications — Coating of passenger rail vehicles
1 Scope
This document establishes the performance requirements and acceptance criteria for coating material used
for passenger rolling stock, locomotives and components.
This document also provides guidance on the coating application processes, product selection, surface
preparation, coating application, verification and inspection methods, repairs, refurbishment (refresh, etc.),
and tests to measure the minimum performance for the final product.
This document applies to all types of coating materials (liquid, powder, etc.) used on
— railway vehicle bodies, and
— on-board equipment and constituent parts.
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 1518-1, Paints and varnishes — Determination of scratch resistance — Part 1: Constant-loading method
ISO 1519, Paints and varnishes — Bend test (cylindrical mandrel)
ISO 2409:2020, Paints and varnishes — Cross-cut test
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 2811-1, Paints and varnishes — Determination of density — Part 1: Pycnometer method
ISO 2812-3, Paints and varnishes — Determination of resistance to liquids — Part 3: Method using an
absorbent medium
ISO 2813, Paints and varnishes — Determination of gloss value at 20°, 60° and 85°
ISO 3233-3, Paints and varnishes — Determination of the percentage volume of non-volatile matter — Part 3:
Determination by calculation from the non-volatile-matter content determined in accordance with ISO 3251, the
density of the coating material and the density of the solvent in the coating material
ISO 3251:2019, Paints, varnishes and plastics — Determination of non-volatile-matter content
ISO 3668, Paints and varnishes — Visual comparison of colour of paints
ISO 4545-1:2023, Metallic materials — Knoop hardness test — Part 1: Test method
ISO 4618:2023, Paints and varnishes — Vocabulary
ISO 4624:2023, Paints and varnishes — Pull-off test for adhesion
ISO 4628-2:2016, 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 4628-3:2024, Paints and varnishes — Evaluation of quantity and size of defects, and of intensity of uniform
changes in appearance — Part 3: Assessment of degree of rusting

ISO 9466:2025(en)
ISO 4628-4:2016, 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 4628-5:2022, Paints and varnishes — Evaluation of quantity and size of defects, and of intensity of uniform
changes in appearance — Part 5: Assessment of degree of flaking
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 or other artificial defect
ISO 6270-2, Paints and varnishes — Determination of resistance to humidity — Part 2: Condensation (in-cabinet
exposure with heated water reservoir)
ISO 6272-1, Paints and varnishes — Rapid-deformation (impact resistance) tests — Part 1: Falling-weight test,
large-area indenter
ISO 6344-2:2021, Coated abrasives — Determination and designation of grain size distribution — Part 2:
Macrogrit sizes P12 to P220
ISO 6344-3, Coated abrasives — Determination and designation of grain size distribution — Part 3: Microgrit
sizes P240 to P5000
ISO 6504-3:2019, Paints and varnishes — Determination of hiding power — Part 3: Determination of hiding
power of paints for masonry, concrete and interior use
ISO 6507-1:2023, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 7784-1, Paints and varnishes — Determination of resistance to abrasion — Part 1: Method with abrasive-
paper covered wheels and rotating test specimen
ISO 8130-1, Coating powders — Part 1: Determination of particle size distribution by sieving
ISO 8130-13, Coating powders — Part 13: Particle size analysis by laser diffraction
ISO 8130-8:2021, Coating powders — Part 8: Assessment of the storage stability of thermosetting powders
ISO 8501-1:2007, 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
ISO 8502-3, Preparation of steel substrates before application of paints and related products — Tests for the
assessment of surface cleanliness — Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-
sensitive tape method)
ISO 8503-1, Preparation of steel substrates before application of paints and related products — Surface
roughness characteristics of blast-cleaned steel substrates — Part 1: Specifications and definitions for ISO
surface profile comparators for the assessment of abrasive blast-cleaned surfaces
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 9514, Paints and varnishes — Determination of the pot life of multicomponent coating systems —
Preparation and conditioning of samples and guidelines for testing
ISO 11890-1, Paints and varnishes — Determination of volatile organic compounds (VOC) and/or semi volatile
organic compounds (SVOC) content — Part 1: Gravimetric method for VOC determination
ISO 11890-2, Paints and varnishes — Determination of volatile organic compounds(VOC) and/or semi volatile
organic compounds (SVOC) content — Part 2: Gas-chromatographic method
ISO 16276-2, Corrosion protection of steel structures by protective paint systems — Assessment of, and
acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating — Part 2: Cross-cut testing and
X-cut testing
ISO 9466:2025(en)
ISO 16474-2:2013/Amd 1:2022, Paints and varnishes — Methods of exposure to laboratory light sources — Part
2: Xenon-arc lamps — Amendment 1: Classification of daylight filters
ISO 16862:2003, Paints and varnishes — Evaluation of sag resistance
ISO 17872, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on metallic
panels for corrosion testing
ISO 18768-1, Organic coatings on aluminium and its alloys — Methods for specifying decorative and protective
organic coatings on aluminium — Part 1: Powder coatings
ISO 19840, Paints and varnishes — Corrosion protection of steel structures by protective paint systems —
Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces
ISO 20567-1:2017, Paints and varnishes — Determination of stone-chip resistance of coatings — Part 1: Multi-
impact testing
ISO 22163:2023, Railway applications — Railway quality management system — ISO 9001:2015 and specific
requirements for application in the railway sector
ISO/CIE 11664-1, Colorimetry — Part 1: CIE standard colorimetric observers
ISO/CIE 11664-2, Colorimetry — Part 2: CIE standard illuminants
ISO/CIE 11664-3, Colorimetry — Part 3: CIE tristimulus values
ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
ISO/CIE 11664-5, Colorimetry — Part 5: CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram
ISO/CIE 11664-6, Colorimetry — Part 6: CIEDE2000 colour-difference formula
3 Terms, definitions, abbreviated terms and symbols
For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 Terms and definitions
3.1.1
coater
paint applicator
operator which applies the coating material (3.1.2)
3.1.2
coating material
product, in liquid, paste or powder form, that, when applied to a substrate, forms a layer possessing
protective, decorative and/or other specific properties
[SOURCE: ISO 4618:2023, 3.48]
3.1.3
technical data sheet
document released by the coating material (3.1.2) supplier which details all the technical parameters needed
to prepare and apply the coating material

ISO 9466:2025(en)
3.1.4
coating system
layer combined of all coats of the same or multiple coating materials
[SOURCE: ISO 4618:2023, 3.51]
3.1.5
qualification
process that proves that a set of technical requirements are fulfilled
3.1.6
refurbishment time
expected duration of use not linked to warranty time
3.1.7
work sample
representative part (same material, same pretreatment) which is produced under qualified production
conditions
3.1.8
standard atmosphere
atmosphere for conditioning or testing according to ISO 554:1976, 2.2 (ordinary tolerances) with 23 °C ±
2 °C and 50 % ± 5 % of relative humidity
3.2 Abbreviated terms and symbols
3.2.1 Abbreviated terms
AASS acetic acid salt spray
AHT alternating humidity and air temperature
CH constant humidity
FRP fibre reinforced plastic
GU gloss unit
NSS neutral salt spray
SCI specular component included
VOC volatile organic compound
3.2.2 Symbols
a thickness µm
C* colourimetric variance according to the chroma axis
R arithmetic mean height of the roughness according to ISO 21920-2
a
R roughness based on themaximum height according to ISO 21920-2
z
Ri degree of rusting according to ISO 4628-3
g specific gravity
spe
Sa surface preparation by blast-cleaning according to ISO 8501-1 (the optional number following
Sa refers to ISO 8501-1:2007, Table 1)

ISO 9466:2025(en)
St surface preparation by hand and power tool cleaning according to ISO 8501-1 (the optional
number following St refers to ISO 8501-1:2007, Table 2)
4 Coating systems, locations and environment and design recommendations
4.1 General
The coating system shall be qualified based on its location within the vehicle.
4.2 Types of locations
The locations are defined in Table 1.
Table 1 — Types of location
Decorative location Non-decorative location
Type of location
(visible to passengers and crew) (non-visible)
Examples include:
Ceiling
Side ceiling
Carbody side walls and ceiling
Interior (walls and ceilings)
Side walls
Parts behind ceilings and side walls
and equipment
(C-rail, hooks, etc.)
Grab-handles
Cab desk
Luggage racks
Seating (pedestal)
Carbody floor
Mounting of seats
Interior needing higher
Toilet walls
resistance to corrosion (floor Mounting of support bars
Mounting parts
and elements mounted on the
Bottom of side of walls
Interior of equipment boxes on the roof
floor)
Vestibule
Examples include: Examples include:
Carbody side Carbody roof (tube)
Exterior doors Carbody ends
Fairings/roof fin Equipment boxes
Carbody roof (rounded) Fairings (for HVAC unit, pantograph,
Exterior (direct UV exposure)
insulator head, etc.)
Carbody ends (if decorative)
Handrail (for inspection of the roof)
Cab front/front end
Drain pipe/gutter
Equipment (outside window frames,
door gutters, etc.) Fresh air duct
Devices (cameras, speakers, etc.) Intercar barrier bracket
Carbody underframe
Equipment mounted on the underframe
Coupler
Exterior (indirect or no UV
No
exposure)
Buffer
Bogie frame and bogie components
Axles, wheelsets
4.3 Standard support and substrates
Table 2 lists the supports and substrates that shall be used for the tests described in Table 3, Table 4, Table 5,
Table 6, Table 7 and Table 8.
For the chemical pretreatments described in Table 2, the name of each product used for pretreatment
(degreasing, etching, passivation, pickling) should be included in the qualification report.

ISO 9466:2025(en)
Table 2 — Standard support and substrates
Type Standard support Support for elasticity tests
Substrate S2 defined in this document as:
Material: cold rolled steel (steel grade: DC01/SPCC-SD)
Thickness: 2 mm
Substrate S1 defined in this
Size:
document as:
—  depends on the test machine;
Material: steel
—  for corrosion tests min. 150 mm × 200 mm.
Steel Thickness: 0,7 mm to 1 mm
Pretreatment:
Size: depends on test machine
— powder: zinc phosphate pretreatment or abrasive blast cleaning
Pretreatment: zinc phosphated
(surface quality: Sa 2½; roughness R value between 25 and
z
or bare surface or both
40 µm) or both;
— liquid: abrasive blast cleaning (surface quality: Sa 2½; roughness
fine G in accordance with ISO 8503-1).
Substrate A2 defined in this document as:
Material: aluminium grade: AlMg3 (Al5754), AlMg2.5 (A5052),
AlSi1MgMn (A6082) or AlMg1SiCu (A6061/Al6061T6)
Thickness: 2 mm min.
Size:
—  depends on the test machine;
—  for corrosion tests: min. 100 mm × 150 mm.
Aluminium Not required
Pretreatment:
— powder: chemical treatment in accordance with ISO 18768-1 or
abrasive blast cleaning (surface quality: Sa 2½; roughness R
z
value between 25 µm and 40 µm) or both;
— liquid: abrasive blast cleaning (the degree of cleanliness shall
have a flat, uniform and clean blasting pattern); roughness R
z
value between 25 µm and 40 µm.
In the case of abrasive blast cleaning and if the surface is not protected from contamination and oxidation,
the coating should be applied immediately after.
The results are not valid for other substrates (e.g. FRP or plastic). A process qualification (see 5.3) is necessary
in any case on the substrate of the project and needs to be performed with the original pretreatment.
4.4 Coating system qualification
4.4.1 General
The coating system shall be qualified in accordance with Table 3, Table 4, Table 5, Table 6, Table 7 and Table 8.
All tests should be performed with the nominal thickness mentioned in Table 4. If single tests are carried out
with a different nominal layer thickness, this shall be explicitly indicated in the test report.
4.4.2 Chemical and physiochemical characteristics of products for each layer

ISO 9466:2025(en)
Table 3 — Chemical and physiochemical characteristics of products for each layer
Type of coating
Characteristic Method Results required
material
Temperature in °C is given in accordance with the safety data
sheet.
Powder and
Flash point References [1] and [2] are given as examples
liquid coats
If a standard or regulation has been followed, please record its
details in the report.
Solid content by mass ready Solid content in % is given in accordance with the technical data
ISO 3251:2019, Table A.1, 60 min, 105 °C Liquid coat only
to use sheet and in the technical report.
ISO 3233-3: Calculating the non-volatile matter
Theoretical yield for liquid
content in accordance with ISO 3251, the densi- Theoretical yield in m /kg/µm is given in accordance with the
coating material (theoretical Liquid coat only
ty of the coating material and the density of the technical data sheet and in the technical report.
spreading rate) (m /kg/µm)
solvent in the coating material.
Theoretical yield for powder
Powder coat
coating material (theoretical Theoretical yield in m /kg/µm is noted in the technical report.
only
ga*
2 spe
spreading rate) (m /kg/µm)
ISO 8130-1
Particle size in % is given in accordance with the technical data Powder coat
Particle size distribution
sheet and in the technical report. only
ISO 8130-13
VOC in g/l is given in accordance with the technical data sheet
Quantity of VOCs (g/l) ISO 11890-1 or ISO 11890-2, or both Liquid coat only
and in the technical report.
ISO 9466:2025(en)
4.4.3 Application properties of products

ISO 9466:2025(en)
Table 4 — Application properties of products
Locations (Table 1)
Characteristic Method Coating material drying Results required and type of coating
material
All locations
Nominal dry film ISO 2808 or ISO 19840, or Data given in accordance with
Thickness in µm is given in accordance with the technical data sheet.
thickness both the technical data sheet
Powder and liquid coats
All locations
Nominal wet
ISO 2808 Not applicable Thickness in µm is given in accordance with the technical data sheet.
thickness
Liquid coat only
Thickness in µm is given in the technical report. All locations
Sagging or run off ISO 16862:2003, method
Not applicable
limit “sag index applicator”
Min. 1,5 times the nominal wet thickness. Liquid coat only
Similar results of values checked before and after artificial storage:
—  topcoat and clear coat: gloss in accordance with ISO 2813;
After artificial storage, cure
All locations
Storage stability
ISO 8130-8:2021, 8.2.1 b) completely in accordance
—  primer: NSS (steel) or AASS (aluminium) in accordance with
(powder coat)
Powder coat only
with technical data sheet.
ISO 9227, 240 h;
—  topcoat and primer: impact test in accordance with ISO 6272-1.
After artificial storage of the
Similar results of values checked before and after artificial storage:
Recommended artificial
liquid coating material and
—  colour checked by human eyes;
storage at 30 °C to 40 °C
All locations
Storage stability panels conditioning, condition
depending on technical
—  topcoat and clear coat: gloss in accordance with ISO 2813;
(liquid coat) for 14 d in a standard atmos-
Liquid coat only
data sheet and for 28 days’
—  primer: NSS (steel) or AASS (aluminium) in accordance with
phere or for 21 d for water
duration
ISO 9227, 240 h.
borne coating materials
All locations
Theoretical pot life ISO 9514 Not applicable Time in h is given in accordance with the technical data sheet.
Only liquid coat
All locations
Method of According to coating
Not applicable Methods listed in the technical data sheet
application process material supplier
Powder and liquid coats
Data is given in accordance with the technical data sheet and in the
EXAMPLE 1  ISO 2431
technical report: specify the name of the standards and the parame-
(flow time in seconds). All locations
Viscosity or flow
ters.
Not applicable
time
EXAMPLE 2  ISO 2555 Only liquid coat
EXAMPLE 1  ISO 2431: flow time of 30 s through cup 6 at 23 °C.
(viscosity).
EXAMPLE 2  ISO 2555: 3 000 mPa·s at 21 °C.
All locations
Density in g/cm is given in accordance with the technical data sheet
Density ISO 2811-1 Not applicable
for each component and in the technical report.
Powder and liquid coats
Information (yes or no) is given in accordance with the technical data
All locations
Re-usability of According to coating
Not applicable sheet: possibility and conditions, if relevant, given by the coating mate-
powder over spray material supplier
Powder coat only
rial supplier.
ISO 9466:2025(en)
4.4.4 Physical characteristics of products
All tests in Table 5 should be performed with the nominal thickness mentioned in Table 4 with a minimum
of deviation. If single tests are carried out with a different nominal layer thickness, this shall be explicitly
indicated in the report.
All tests in Table 5 shall be performed after a minimum of two weeks drying in a standard atmosphere for
liquid coating material and in accordance with the technical data sheet for powder coating material.

ISO 9466:2025(en)
Table 5 — Physical characteristics
Locations
Type of support
Characteristic Method Results required (Table 1) and type
(Table 2)
of coating material
Check the hiding power in accordance with ISO 6504-3:2019, Method B
Liquid coating
with black or white cards.
Hiding power in % is calculated by nominal
material: black
All decorative
Three colours shall be checked, depending on the chroma level: thickness:
or white cards
locations
—  level 1: C* ≤ 7; —  good hiding power ≥98 %;
Hiding power
Powder coating
Liquid and powder
—  level 2: 7 < C* ≤ 30; — 95 % ≤ limited hiding power < 98 %; material: black
coats
or white metal
—  level 3: C* > 30. —  weak hiding power <95 %.
panels
Powder: with black or white metal panels instead
The recommended stages from ISO 9117-5 are:
Drying time Time in h for each stage is given in accord-
—  stage 1 (dust-free): ISO 9117-3 and ISO 9117-5; All locations
(liquid coating ance with the technical data sheet for each A2
—  stage 3 (touch dry): ISO 9117-5; Liquid only
material) component and in the technical report.
—  stage 6 (through dry): ISO 9117-5.
Time in min and object temperature in °C is
After curing, perform all mechanical and chemical resistance tests in
given in accordance with the technical data
Curing conditions
accordance with this document. All locations
sheet and in the technical report:
(powder coating A2
All tests in the reference with powder coat shall be performed using the Powder only
material) —  min. temperature with time, and
minimum temperature and time from the technical data sheet.
—  max. temperature with time.
Perform sanding with grit P120 at different times until clogging on the
All location
Drying time Time of drying in h by which clogging is no
paper is no longer noticed.
A2
before sanding longer visible after sanding.
Liquid only
After sanding, the aspect should have a homogeneous mat surface.
Apparatus: drying coating material at defined standard conditions:
a)  ambient drying in a standard atmosphere
b)  forced curing at 50 °C object temperature
Time in h for dry to tape is given by the
c)  powder coat curing in accordance with technical data sheet
supplier: drying time and condition of
Type of tape: adhesion power on greased-free steel panel between 2 N/cm
tested layer.
and 4 N/cm
Time in h is without any residues of coating
Apply the tape and smooth the surface with a plastic applicator (i.e. squee- All locations
Dry-to-tape material on the tape after removing. A2
gee).
Liquid only
After drying the final layer (in accordance
Duration of the tape contact time: 60 min in standard atmosphere
with technical data sheet): no marks of
Remove tape in accordance with ISO 2409:2020, Annex A:
tape after application of the final coating
—  peeling angle: 60° in accordance with ISO 2409;
layer.
—  peeling speed: between 0,5 s and 1 s.
Apply the final coating layer.
Observe the aspect of the final coating layer after curing.

ISO 9466:2025(en)
Table 5 (continued)
Locations
Type of support
Characteristic Method Results required (Table 1) and type
(Table 2)
of coating material
Recoatability with following layer: defining the time during which it is not
necessary to grind before applying the following coating material layer.
nd
Liquid: conditioning of the 2 layer for 7 d in a standard atmosphere
Time in h is linked to the drying conditions
All locations
nd
and type of 2 layer with:
Powder: standard curing
Recoatability with
A2
Liquid and powder
following layer —  blistering: 0(S0);
Test: 72 h condensed water test in accordance with ISO 6270-2:
coats
—  adhesion: cross-cut value ≤1.
—  immediately after the test: check blistering in accordance with
ISO 4628-2;
—  24 h after the test: check adhesion in accordance with ISO 2409.
Test method: establishing the time during which it is not necessary to
grind before applying the same layer again.
—  recoatability with itself to the nominal film thickness of the technical
data sheet by spraying;
—  drying time of the first coat: 1,5 h at 50 °C object temperature;
—  possible stages for qualification depending on the coating system:
Maximum time
—  stage 1: 16 h storage in a standard atmosphere, without sanding,
between coating
—  stage 2: 72 h storage in a standard atmosphere without sanding;
operation –
All locations
—  curing;
Recoatability with Achieved stage with cross-cut value ≤1 A2
Liquid only
—  30 min flash-off time in a standard atmosphere;
itself after storage
in a standard
—  7 d at 50 °C object temperature in circulating air oven – subsequently
atmosphere
cool down to standard atmosphere;
—  7
...