ISO 12944-5-2019 PDF
Name in English:
St ISO 12944-5-2019
Name in Russian:
Ст ISO 12944-5-2019
Original standard ISO 12944-5-2019 in PDF full version. Additional info + preview on request
Full title and description
Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 5: Protective paint systems (ISO 12944-5:2019). This part describes types of paints and complete paint systems commonly used for corrosion protection of steel structures and gives guidance for selecting appropriate systems for different atmospheric and immersion environments.
Abstract
ISO 12944-5:2019 lists and describes protective paint system types (primers, intermediate coats and topcoats), provides recommended systems matched to corrosivity categories and expected durability, and gives selection guidance referenced to other parts of the ISO 12944 series (notably Parts 1, 2 and 4). The document excludes guidance for corrosivity category CX and category Im4 as defined in ISO 12944-2.
General information
- Status: Published (International Standard).
- Publication date: September 2019.
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 87.020 (Paint coating processes).
- Edition / version: Edition 4 (2019).
- Number of pages: 23.
Scope
Specifies commonly used paint types and multilayer paint systems for corrosion protection of steel structures and provides guidance on selecting systems for the corrosivity categories defined in ISO 12944-2, taking into account surface-preparation grades (ISO 12944-4) and expected durability classes (ISO 12944-1). It does not provide selection guidance for the offshore extreme corrosivity category CX or for category Im4.
Key topics and requirements
- Descriptions of paint types (primers, intermediate coats, topcoats) and common material families used in protective systems.
- Recommended system compositions and typical layer sequences for different corrosivity categories and durability grades.
- Guidance for matching paint systems to environmental classification (per ISO 12944-2) and to surface-preparation grades (per ISO 12944-4).
- Exclusions and special cases — does not cover corrosivity category CX or category Im4 selection guidance.
- Durability expectations and terminology aligned with ISO 12944-1 (durability classes such as low/medium/high and associated service-life guidance).
- Practical considerations: compatibility, minimum dry film thickness, number of coats, and factors affecting system performance (design, workmanship and maintenance).
Typical use and users
Used by specifiers, corrosion and coatings engineers, asset owners, fabricators, coating manufacturers, contractors and inspection bodies to select, specify and evaluate protective paint systems for steel structures in atmospheric, immersed and buried applications. It supports development of contract specifications and maintenance planning.
Related standards
ISO 12944-5 is one part of the ISO 12944 series. Closely related parts include ISO 12944-1 (general introduction and durability classification), ISO 12944-2 (classification of environments), ISO 12944-3 (design considerations), ISO 12944-4 (surface preparation), ISO 12944-6 (laboratory performance test methods), ISO 12944-7 (execution and supervision of paint work), ISO 12944-8 (development of specifications) and ISO 12944-9 (offshore and related structures). Earlier editions (for example the 2018 edition) were withdrawn and replaced by the 2019 edition.
Keywords
corrosion protection; protective paint systems; steel structures; coatings; primers; topcoats; surface preparation; durability classes; corrosivity categories; ISO 12944.
FAQ
Q: What is this standard?
A: ISO 12944-5:2019 is the ISO international standard that defines and describes protective paint systems used for corrosion protection of steel structures and gives guidance for selecting systems appropriate to environmental corrosivity and expected durability.
Q: What does it cover?
A: It covers the types and combinations of paints and coating layers (primers, intermediate coats, topcoats), recommended system sequences and typical system examples for different corrosivity categories and durability expectations; it links selection to the other parts of ISO 12944 for environment classification, surface preparation and testing. It excludes selection guidance for category CX and Im4.
Q: Who typically uses it?
A: Coating specifiers, corrosion engineers, asset owners, fabricators, contractors, coating manufacturers and inspection agencies use the standard to prepare specifications, choose systems and set acceptance/maintenance criteria.
Q: Is it current or superseded?
A: ISO 12944-5:2019 is the published edition that replaced the 2018 edition; as published it is the current ISO edition, though ISO standards are periodically reviewed and can be subject to revision. The 2018 edition was withdrawn and superseded by the 2019 edition.
Q: Is it part of a series?
A: Yes — it is Part 5 of the multi-part ISO 12944 series, which collectively covers environment classification, design, surface preparation, test methods, execution and specification development for protective coatings on steel.
Q: What are the key keywords?
A: corrosion protection; protective paint system; steel structures; atmosphere classification; surface preparation; durability; primers; topcoats; ISO 12944.