introduction
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ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
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This document was prepared by Technical Committee ISO/TC 79, Light Metals and their Alloys, Subcommittee SC 2, Organic and anodized Coatings on Aluminium.
A list of all parts in the ISO 18768 series can be found on the ISO website.
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introduce
There are three main surface treatments for aluminum and its alloys:
a) anodized coating;
b) Organic coatings;
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
c) A combination of anodized coating and organic coating.
This document and ISO 18768-2 provide performance requirements and test methods for b) organic coatings.
a) Performance requirements and test methods for anodized coatings are given in ISO 7599, and c) combined anodized coatings and organic coatings are given in ISO 28340.
It is assumed that users are familiar with other relevant international and regional standards. These standards should be respected, and this document uses an optional system in this context.
1 Range
This document specifies methods for specifying decorative and protective powder coatings on aluminum and its alloys. It defines the characteristic properties of powder coatings and provides a test method with minimum performance requirements, taking into account the application and erodibility of the environment in which the coated aluminum is located.
This document does not apply to aluminum coil coatings.
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. For dated references, only the cited version applies. For undated references, a new version of the reference (including any revisions) applies.
ISO 1463, Metal and oxide coatings – Measurement of coating thickness – microscopy methods
ISO 1519, Paints and varnishes – Bending test (cylindrical mandrel)
ISO 1520, Paints and varnishes – cupping test
ISO 2360, Non-conductive coatings on non-magnetic conductive base metals – Measurement of coating thickness – amplitude sensitive eddy current method
ISO 2409, Paints and varnishes – Crosscutting testing
ISO 2810, Paints and varnishes – Natural weathering of coatings – exposure and assessment
ISO 2813, Paints and varnishes – Determination of gloss values at 20°, 60° and 85°
ISO 2815, Paints and varnishes – Buchholz indentation test
ISO 3892, Conversion coatings on metallic materials – Determination of coating mass per unit area – Gravimetric method
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
ISO 4623-2, Paints and varnishes – Determination of filamentous corrosion – Part 2: Aluminium substrates
ISO 4628-1, Paints and varnishes – Assessment of degradation of coatings – number and size of defects and designation of intensity of uniform change in appearance – Part 1: General introduction and designation of systems
ISO 4628-2, Paints and varnishes – Assessment of coating degradation – designation of number and size of defects, and intensity of uniform changes in appearance – Part 2: Assessment of degree of foaming
ISO 4628-10, Paints and varnishes – Assessment of coating degradation – designation of number and size of defects, and intensity of uniform changes in appearance – Part 10: Assessment of degree of filamentous corrosion
ISO 6270-1, Paints and varnishes – Determination of moisture resistance – Part 1: Condensation (single side exposure)
ISO 6270-2, Paints and varnishes – Determination of moisture resistance – Part 2: Condensation (exposure in cabinets with hot water tanks)
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
ISO 6270-3, Paints and varnishes – Determination of moisture resistance – Part 3: Condensation (exposure in cabinets with heated, bubbling tanks)
ISO 6272-1, Paints and varnishes – Rapid deformation (impact resistance) tests – Part 1: drop weight test, large area indenter
ISO 6272-2, Paints and varnishes – Rapid deformation (impact resistance) tests – Part 2: drop weight test, small area indenter
ISO 8251, Anodizing of aluminium and its alloys – Measurement of the wear resistance of anodized coatings
ISO 8993, anodizing of aluminium and its alloys – pitting evaluation and rating system – Graphical method
ISO 9227, corrosion testing in artificial atmospheres – salt spray testing
ISO 15184, paints and varnishes – Determination of film hardness by pencil test
ISO 16474-2, Paints and varnishes – Methods of exposure to laboratory light sources – Part 2: xenon arc lamps
ISO 16474-3, Paints and varnishes – Methods of exposure to laboratory light sources – Part 3: Fluorescent ultraviolet lamps
ISO 22479, Corrosion of metals and alloys – Test for sulfur dioxide in humid atmospheres (fixed gas method)
ISO 28340:2013, Composite coatings on aluminium – General specification for combined coatings of electrophoretic organic coatings and anodized coatings on aluminium
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
ASTM C207, Standard specification for hydrated lime for Masonry
ASTM D2794, Standard Test Method for Resistance of Organic Coatings to Rapid Deformation (shock) effects
ASTM D7869, Standard Practice for Xenon Arc Exposure Testing of Transportation Coatings, Enhanced Light and water exposure
ASTM G85-19, Improved Standard Practice for Salt Shop (fog) testing
GSB International, GSB QR AL 631-7 ST 663-7, International Quality Code for Coatings on Building Components
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Powder Coating
A continuous coating powder applied to an aluminum or aluminum alloy substrate that is protective and/or decorative
3.2 Reference Examples
Reference specimen
ISO 18768-1-2022 – Organic Coatings on aluminium and its alloys – Specification of methods for decorative and protective organic coatings on aluminium – Part 1: Powder coatings
Define a sample of acceptable attribute criteria
Note 1: This can be agreed between the customer and the surface treatment provider.
3.3 Important Surfaces
The part of the article covered or to be covered by the coating, and the coating is of no further importance to the service and/or appearance
3.4 Sample
A single sample of the final product for testing
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