SIST EN 12206-1:2021

SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST EN 12206-1:2005
Barve in laki - Premazi za aluminij in aluminijeve zlitine v gradbeništvu - 1. del:
Premazi iz termoreaktivnih praškov
Paints and varnishes - Coating of aluminium and aluminium alloys for architectural
purposes - Part 1: Coatings prepared from thermosetting coating powder
Beschichtungsstoffe - Beschichtungen auf Aluminium und Aluminiumlegierungen für
Bauzwecke - Teil 1: Beschichtungen aus Beschichtungspulvern
Peintures et vernis - Revêtement de l'aluminium et de ses alliages pour des applications
architecturales - Partie 1: Revêtements à partir de peinture en poudre thermodurcissable
Ta slovenski standard je istoveten z: EN 12206-1:2021
ICS:
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12206-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN 12206-1:2004
English Version
Paints and varnishes - Coating of aluminium and
aluminium alloys for architectural purposes - Part 1:
Coatings prepared from thermosetting coating powder
Peintures et vernis - Revêtement de l'aluminium et de Beschichtungsstoffe - Beschichtungen auf Aluminium
ses alliages pour des applications architecturales - und Aluminiumlegierungen für Bauzwecke - Teil 1:
Partie 1: Revêtements à partir de peinture en poudre Beschichtungen aus Beschichtungspulvern
thermodurcissable
This European Standard was approved by CEN on 1 September 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12206-1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements . 8
4.1 Material (substrate) . 8
4.2 Pretreatment of the substrate . 8
4.3 Coating powder . 10
4.4 Coating process . 13
4.5 Final product . 13
4.6 Certificate of conformity . 14
5 Test methods . 15
5.1 General. 15
5.2 Preparation of test panels for testing coating powders . 15
5.3 Sampling of the final product and preparation of test specimens . 15
5.4 Colour . 15
5.5 Gloss . 15
5.6 Adhesion . 15
5.7 Cupping test . 15
5.8 Falling weight test. 16
5.9 Bend test . 16
5.10 Resistance to mortar . 16
5.11 Pressure cooker test . 16
5.12 Resistance to boiling water . 16
5.13 Resistance to humidity . 16
5.14 Resistance to acetic acid salt spray . 16
5.15 Resistance to sulfur dioxide . 17
5.16 Resistance to filiform corrosion . 17
5.17 Resistance to artificial weathering . 17
5.18 Resistance to natural weathering (referee test) . 17
Annex A (normative) Methods for the determination of the mass per unit area of
conversion layers and for the identification of chromium, phosphorous and zinc . 18
Annex B (normative) Requirements for alternative pretreatment . 22
Annex C (normative) Measurement of film thickness . 23
Bibliography . 24

European foreword
This document (EN 12206-1:2021) has been prepared 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 November 2021, and conflicting national standards
shall be withdrawn at the latest by November 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 12206-1:2004.
In comparison with the previous edition, the following changes have been made:
— 3.4: Definition source amended;
— 4.2.2.1: Methods of pretreatment now includes deluging;
— 4.2.2.2: Change of terminology to etching;
— 4.2.2.2.1: Clause added;
— 4.2.2.2.2 Clause added;
— 4.2.2.3.3: Process for non-chromate systems more defined;
— 4.2.2.3.4: Process for electrolytic conversion more defined;
— 4.2.2.3.4: Separate clause for electrolytic conversion added;
— 4.3.1: Identification of powder now required;
— 4.3.1: Separation of conventional technology and enhanced durability products removed;
— 4.3.2: Clause added;
— 4.3.3.5: Cupping test – 2 categories introduced;
— 4.3.3.6: Falling weight test – 2 categories introduced;
— 4.3.3.7: Bend test – 2 categories introduced;
— 4.3.3.14: Manufacturer to state length of resistance to weathering test;
— 4.5.2-4.5.9: Clauses renumbered;
— 4.5.6: Minimum film thickness requirement altered;
— 4.6: Clause added;
— 5.4: Colourimetrically standards added;
— 5.8: Clause amended;
— 5.16: Clause amended;
— Annex B: Natural weathering test requirements altered;
— Annex C: Test procedure for film thickness tests removed;
— Annex D: Deleted;
— Annex E: Deleted;
— Annex F: Deleted.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
Introduction
This is the first part of EN 12206. The present intention is to develop another part dealing with the
organic coating of aluminium and aluminium alloy extrusions, sheet and preformed sections for
architectural purposes, prepared from liquid coating materials.
1 Scope
This document specifies requirements and the corresponding methods of test relating to the organic
coating of aluminium and aluminium alloy extrusions, sheet and preformed sections for architectural
purposes, using coating powders. It also describes:
a) the pretreatment of the substrate prior to the coating process;
b) the coating powder;
c) the coating process;
d) the final product.
Each item is dealt with separately in this document so that any interested party can ensure compliance
appropriate to its area of responsibility.
CAUTION — The procedures described in this standard are intended to be carried out by suitably
trained and/or supervised personnel. The substances and procedures used in this method could be
injurious to health if adequate precautions are not taken. Attention is drawn in the text to specific
hazards. This document refers only to technical suitability and does not absolve the user from statutory
obligations relating to health and safety.
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.
EN 573-3, Aluminium and aluminium alloys - Chemical composition and form of wrought products - Part
3: Chemical composition and form of products
EN ISO 1519, Paints and varnishes - Bend test (cylindrical mandrel) (ISO 1519)
EN ISO 1520, Paints and varnishes - Cupping test (ISO 1520)
EN ISO 2409, Paints and varnishes - Cross-cut test (ISO 2409)
EN ISO 2810, Paints and varnishes - Natural weathering of coatings - Exposure and assessment (ISO 2810)
EN ISO 2813, Paints and varnishes - Determination of gloss value at 20°, 60° and 85° (ISO 2813)
EN ISO 3231, Paints and varnishes - Determination of resistance to humid atmospheres containing sulfur
dioxide (ISO 3231)
EN ISO 3668, Paints and varnishes - Visual comparison of colour of paints (ISO 3668)
EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696)
EN ISO 6270-1, Paints and varnishes - Determination of resistance to humidity - Part 1: Condensation
(single-sided exposure) (ISO 6270-1)
EN ISO 8130-9, Coating powders - Part 9: Sampling (ISO 8130-9)
EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227)
EN ISO 16474-2:2013, Paints and varnishes - Methods of exposure to laboratory light sources - Part 2:
Xenon-arc lamps (ISO 16474-2:2013)
EN ISO 16474-3, Paints and varnishes - Methods of exposure to laboratory light sources - Part 3:
Fluorescent UV lamps (ISO 16474-3)
EN ISO 18314-1, Analytical colorimetry - Part 1: Practical colour measurement (ISO 18314-1)
ISO 2143, Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic
oxidation coatings after sealing — Dye-spot test with prior acid treatment
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 2859-2, Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by
limiting quality (LQ) for isolated lot inspection
ISO 4623-2, Paints and varnishes — Determination of resistance to filiform corrosion — Part 2:
Aluminium substrates
ISO 9223, Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination
and estimation
ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
powder coating
continuous layer of a coating powder which has been applied to the aluminium or aluminium alloy
substrate and which is protective or decorative, or both
3.2
conversion layer
layer produced on an aluminium surface by chemical pretreatment with or without the use of an
applied electric current
3.3
finish
surface of the coated article which determines its appearance
3.4
coating powder
coating material in powder form which, after fusing and possibly curing, gives a continuous film
[SOURCE: EN ISO 4618:2014]
3.5
significant surface
that area of the article on which the coating is essential for serviceability and/or appearance
3.6
specifier
person specifying the performance requirements for the coating and significant surfaces of the article
3.7
test specimen
single sample of the final product to be used for testing
4 Requirements
4.1 Material (substrate)
Aluminium and aluminium alloys are classified in accordance with EN 573-3. Suitable materials are
those listed as series 1 000, 3 000, 5 000 and 6 000.
4.2 Pretreatment of the substrate
4.2.1 General
Before application of the coating powder, a pretreatment layer shall be applied. This pretreatment may
be either
a) chemical treatment with aqueous solutions containing either chromate ions or chromate and
phosphate ions, without applying an electric current, or
b) an alternative pretreatment (for instance chromium-free systems, “no-rinse-dry-in-place
pretreatment” or electrolytic conversion (pre-anodising), or other processes).
After the conversion process, the substrate is normally rinsed with deionized water and dried.
4.2.2 Chemical treatment
4.2.2.1 General
The aluminium or aluminium alloy shall be free from corrosion prior to pretreatment.
Any item previously coated or anodized shall be stripped down to the aluminium substrate prior to the
pretreatment.
The pretreatment stages shall take place one after the other with the minimum delay in between to
ensure that the surface to be pretreated does not become dry between successive stages.
The pretreatment solutions shall be applied either:
a) by dipping in baths of sufficient size to allow efficient operation of the chemical process on all
significant surfaces; or
b) by spraying, in tanks or cabinets made so that all significant surfaces are in contact with the
spraying solution for the specified period of time; or
c) by deluging, in tanks or cabinets made so that all significant surfaces are in contact with the
deluging solution for the specified period of time.
The solution used for the conversion process is normally used for aluminium and aluminium alloys
only. Pretreatment of other metals is not authorized unless metallic-ion contamination is continuously
removed or less than specified maximum values.
4.2.2.2 Cleaning, etching and rinsing
4.2.2.2.1 Cleaning
All surface contaminants such as oils, greases, lubricants and other residues shall be removed using
alkaline or acidic solutions and/or organic solvents in appropriate combinations. After cleaning the
substrate may be rinsed.
4.2.2.2.2 Etching
Before the conversion stage, the substrate shall be etched with alkaline or acidic solutions or both
successively. The etching shall remove a minimum of 1 g/m of the aluminium substrate by weight.
After etching, the substrate may be rinsed.
4.2.2.3 Conversion of aluminium surface
4.2.2.3.1 General
The conversion of the aluminium surface may be carried out using chromate or non-chromate
conversion coatings or anodising.
4.2.2.3.2 Conversion and drying of chromate and phosphochromate layers
A conversion layer is produced by application of the appropriate solution.
Chromate conversion layers vary in colour from an iridescent yellow to a golden tan. The layers are
characterized by the presence of chromium and the absence of phosphate (see Annex A).
The mass per unit surface area of the conversion layer, often referred to as “conversion coating weight”,
as measured in accordance with the method described in Annex A, shall be between 0,4 g/m and
1 g/m .
Phosphochromate conversion layers vary in colour from iridescent to various shades of green. The
layers are characterized by the presence of both chromate and phosphate (see Annex A).
The mass per unit surface area of the conversion layer, as measured in accordance with the method
2 2
described in Annex A, shall be between 0,4 g/m and 1,2 g/m .
NOTE The colours given above are only indicative. They depend on alloys used and pretreatment and do not
characterize the quality of the conversion layer.
Where a rinsed system is used the conversion layer can be rinsed with water and shall finally be rinsed
with deionized water. The electrical conductivity of the water draining off from significant surfaces at
the final rinse shall be below 30 µS/cm at 20 °C.
If the final rinse is carried out with hot water, the temperature shall not exceed 60 °C and the rinsing
time shall be as short as possible in order to avoid dissolving of hexavalent chromium from the
conversion layer.
The layer shall be as uniform as possible, adhering to the substrate and free from any powdering.
The drying temperature after pretreatment, as measured on the metal surface, shall not exceed 100 °C if
the coating powder is applied without delay or interruption after pretreatment. If it is applied with
delay or interruption after pretreatment (less than 16 h), the maximum temperature on the metal
surface shall be as follows:
— 65 °C for chromate layers;
— 85 °C for phosphochromate layers.
The coating powder shall not be applied more than 24 h after pretreatment.
4.2.2.3.3 Non-chromate systems
Alternative pretreatments, e.g. chromium-free systems, “no-rinse-dry-in-place pretreatment” or other
processes may be used in place of chromate or phosphochromate.
The use of alternative systems shall be applied in accordance with the supplier or manufacturer's
instructions. A set of these instructions and appropriate recording and monitoring instructions shall be
maintained by the applicator. The instructions shall include methods of surface preparation methods
and post treatment including drying instructions. If the alternative system does not require rinsing then
this shall be stated. The electrical conductivity of the water draining off from significant surfaces at the
final rinse shall be below 30 µS/cm at 20 °C.
The coating powder shall not be applied more than 24 h after pretreatment.
Certain chromium-free pretreatments are comparable to chromium containing pre-treatments
regarding corrosion protection. Chromium free systems can have increased demands on process
control and bath maintenance
4.2.2.3.4 Electrolytic conversion (Pre-anodising)
The anodic pretreatment shall be chosen so as to produce an anodic coating with a thickness of at least
3 µm (not more than 8 µm) without powdering and without surface flaws. The anodic layer shall not be
sealed.
The anodic layer shall be rinsed with deionized water. for as long as is required to remove the acid from
the surface The electrical conductivity of the water draining off from significant surfaces at the final
rinse shall be below 30 µS/cm at 20 °C.
The time between preanodising and coating shall be less than 72 h. If the time between preanodising
and coating is more than 24 h, the preanodising shall be tested by a dye spot test in according to
ISO 2143. The intensity of stain shall be 5.
4.3 Coating powder
4.3.1 Identification
The following information shall be made available by the supplier for each consignment of coating
powder:
a) manufacturer;
b) trade name;
c) colour;
d) gloss level;
NOTE Measurement of gloss on certain textured and effect powders is not technically useful.
e) type of binder base;
f) batch number;
g) box number;
h) product reference code;
i) confirmation of length of natural weathering test completed;
j) confirmation of class for flexibility tests 4.3.3.5, 4.3.3.6 and 4.3.3.7;
k) date of manufacture;
l) expiration date;
m) date of despatch.
4.3.2 Storage
The coating powder, after storage in unopened containers for a maximum period indicated by the
manufacturer, calculated from the date of despatch by the manufacturer shall still conform to 4.3.3. If no
maximum permissible storage period is indicated by the manufacturer, the coating powder shall after
storage in unopened containers for up to 12 months from the date of despatch by the manufacturer
shall conform to 4.3.3.
The storage temperature shall not exceed 35 °C unless otherwise specified by the coating powder
manufacturer.
Coating powder that has been stored for longer than the maximum permissible period indicated by the
manufacturer (or if no maximum permissible storage period has been indicated and the coating powder
has been stored for longer than 12 months) shall only be used upon agreement between the
manufacturer and the coating applicator.
4.3.3 Performance requirements
4.3.3.1 General
The tests shall be carried out in accordance with Clause 5. The panels shall be prepared in accordance
with 5.2.
4.3.3.2 Colour
When tested in accordance with 5.4, the colour of the coating shall match the colour previously
specified with agreed limits.
4.3.3.3 Gloss
When tested in accordance with 5.5, the gloss level of the coating shall be in the range of ± 10 units of
the specified value for coatings of gloss greater than 50 units, and in the range of ± 7 units for coatings
of gloss equal to or less than 50 units.
4.3.3.4 Adhesion
When tested in accordance with 5.6, the result of the test shall be classification 0.
4.3.3.5 Cupping test
Class a When tested in accordance with 5.7, there shall be neither cracking in the coating nor any
detachment of the coating.
Cla
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