ISO 18768-2-2022 PDF

Full title and description

Organic coatings on aluminium and its alloys — Methods for specifying decorative and protective organic coatings on aluminium — Part 2: Liquid coatings. This ISO standard (ISO 18768-2:2022) specifies how to define characteristic properties, testing methods and minimum performance requirements for decorative and protective liquid organic coatings applied to aluminium and its alloys.

Abstract

ISO 18768-2:2022 defines the characteristic properties of liquid organic coating systems for aluminium, lists the information to be supplied by the customer to the surface processor, describes appropriate metal preparation and pretreatment, and provides test methods and minimum performance requirements referenced to intended application and environmental aggressiveness. It applies primarily to liquid coatings applied by electrostatic liquid spraying, air spraying or airless spraying and excludes coil coatings.

General information

• Status: Published / Current.
• Publication date: June 2022 (first edition).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.60 (Organic coatings).
• Edition / version: Edition 1 (2022).
• Number of pages: 40 pages (first edition).

Scope

Provides methods for specifying decorative and protective liquid organic coatings on aluminium and its alloys for general applications. The standard defines which coating properties should be specified, the sampling and testing methods to verify those properties, and minimum performance requirements tied to the application type and the aggressiveness of the service environment. It is intended for liquid coating processes such as electrostatic liquid spraying, air spraying and airless spraying and explicitly does not apply to coil coatings on aluminium.

Key topics and requirements

• Information exchange requirements (data the customer supplies to the surface processor: substrate, pretreatment, intended environment, appearance and tolerances).
• Recommended metal preparation and pretreatment options (degreasing, etching, anodic oxidation, chemical conversion coatings, and alternative pretreatments).
• Classification of coating categories and linking minimum performance to environmental aggressiveness and application type.
• Measurement and test methods for appearance, colour, gloss and distinctness of image; coating thickness and hardness.
• Mechanical and durability tests: adhesion (dry/wet, pull-off, cross-cut), impact and multi-impact (stone chipping), flexibility (T-bend/mandrel), cupping, abrasion resistance (falling sand, rubber-wheel).
• Chemical and solvent resistance tests, water resistance, thermal cycling and weathering (including accelerated xenon/UV exposure and cyclic corrosion tests) and corrosion resistance assessments.
• Specified minimum acceptance/performance criteria that relate to service environment categories (selection guidance for specifiers and contract clauses for suppliers).
• References to international test methods and normative documents used to perform and evaluate the tests.

Typical use and users

Used by specification writers, architects and designers, aluminium surface processors and coating applicators, coating manufacturers and formulators, independent testing laboratories, quality assurance and procurement teams, and compliance officers who need to specify, verify or accept liquid organic coatings on aluminium for architectural, industrial or transportation applications.

Related standards

ISO 18768-1:2022 (Part 1 — Powder coatings) is the companion document covering powder coating systems for aluminium. Other commonly referenced standards and test-method documents used together with ISO 18768-2 include ISO test-method series for coating assessment (for example ISO 1463, ISO 1519, ISO 1520, ISO 2409, ISO 2813, ISO 4628 and ISO 9227) and relevant ASTM methods cited as normative references in the standard (examples: ASTM D7869, ASTM D968). These related standards provide specific test procedures referenced by ISO 18768-2.

Keywords

organic coatings; liquid coatings; aluminium; aluminium alloys; coating specification; performance requirements; adhesion; corrosion resistance; weathering; gloss; colour; testing methods; electrostatic spraying; air spraying; airless spraying; ISO 18768.

FAQ

Q: What is this standard?

A: ISO 18768-2:2022 is an international standard that gives methods for specifying decorative and protective liquid organic coatings on aluminium and its alloys, including the properties to be specified, relevant tests and minimum performance requirements.

Q: What does it cover?

A: It covers customer information requirements, substrate preparation and pretreatment options, coating categories, detailed test methods for appearance, mechanical and durability properties (adhesion, impact, abrasion, flexibility), chemical and weathering resistance, and the linking of minimum acceptance criteria to the intended use and environmental aggressiveness. Coil coatings are excluded.

Q: Who typically uses it?

A: Specifiers (architects, engineers), aluminium finishers and applicators, coating manufacturers, independent test laboratories, QA teams and purchasers specifying coated aluminium products. It is used wherever a consistent, verifiable specification for liquid coatings on aluminium is required.

Q: Is it current or superseded?

A: ISO 18768-2:2022 is the first edition and was published in June 2022. It is published and current; no replacement or formal supersession was identified as of 28 February 2026. Users should check national standards bodies or ISO for any later amendments or corrigenda before using the standard in new contracts.

Q: Is it part of a series?

A: Yes — ISO 18768 is a multi-part standard for organic coatings on aluminium and its alloys. Part 1 covers powder coatings (ISO 18768-1:2022) and Part 2 covers liquid coatings (this document). Other related parts or technical work from ISO/TC 79/SC 2 may exist for combined systems or guidance.

Q: What are the key keywords?

A: Organic coatings, liquid coatings, aluminium, specification, testing methods, adhesion, corrosion resistance, weathering, gloss, colour, performance requirements, electrostatic spraying.