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AS/NZS 2312.3:2025

[Current]

Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings, Part 3: Thermal metal spray coatings

This document provides guidelines for the proper specification of thermal spray coating systems, mainly for atmospheric exposure
Published: 02/05/2025
Pages: 25
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Designation
2 Classification of environments
2.1 Atmospheric corrosivity and classifications
3 Coating materials and corrosion behaviour
3.1 Corrosion of zinc
3.2 Corrosion of aluminium
3.3 Corrosion of zinc-aluminium alloys
3.4 Factors affecting thermal spray selection
4 Design and fabrication for thermal spray coatings
4.1 General
4.2 Design
4.3 Fabrication
5 Surface preparation for thermal spray
6 Durability of thermal spray coating systems
7 Application of thermal spray systems
7.1 General
7.2 Sealing
8 Thermal spray paint (duplex) finishes
8.1 Systems for extended service life
8.2 Decorative finishes and colour coding
8.3 Durability considerations for topcoat selection
8.4 Architectural finishes
8.5 Sealers in duplex systems
8.6 Duplex systems for extended service life
9 Repair of thermal sprayed coatings
10 Inspection and testing
10.1 General
10.2 Equipment set-up
10.3 Inspection of the applied coating
11 Specifications and documentation
11.1 Specifications
11.2 Documentation
Appendix A
A.1 General
A.2 Atmospheric corrosivity classifications
A.2.1 C1 — Very Low
A.2.2 C2 — Low
A.2.3 C3 — Medium
A.2.4 C4 — High
A.2.5 C5 — Very High
A.2.6 CX— Extreme
A.3 Other environments
A.3.1 Water
A.3.2 Abrasion
A.3.3 Chemicals
A.3.4 Elevated temperatures
Appendix B
B.1 General
Appendix C
C.1 General
C.2 Procedure
Bibliography
Cited references in this standard
Content history
[Superseded]
DR AS/NZS 2312.3:2024