AS NZS 2312.2-2014 PDF

Full title and description

AS/NZS 2312.2:2014 — Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings — Part 2: Hot dip galvanizing. This part gives guidance and recommendations for the design and specification of articles intended to be hot dip galvanized for corrosion protection in atmospheric environments.

Abstract

This standard provides guidance on the appropriate use of hot dip galvanizing (HDG) as a corrosion protection method for structural steel. It describes types of zinc coatings, design considerations for items to be galvanized (including fabrication and detailing to improve durability), compatibility with other coatings and substrates, and references to relevant product and test standards. The document was prepared to separate HDG guidance from paint-system guidance and is aligned with international guidance on zinc coatings.

General information

• Status: Current (listed in Standards catalogs; also shown as 'pending revision' on some publisher listings).
• Publication date: 19 December 2014.
• Publisher: Standards Australia in joint publication with Standards New Zealand.
• ICS / categories: Metallic coatings and testing of metals (examples: 25.220.40; 77.040 as used by standard catalogues).
• Edition / version: 1st edition (2014).
• Number of pages: 44 pages (typical publisher listing).

Scope

Provides guidelines and recommendations regarding general principles of design and specification appropriate for articles to be hot dip galvanized for atmospheric corrosion protection. The standard clarifies requirements for specifying galvanizing after fabrication, continuity of protection at joins and details affecting life expectancy, and interfaces with other coating systems and manufacturing tolerances. It draws on international zinc-coatings guidance and replaces the HDG-specific material previously embedded in the earlier combined AS/NZS 2312:2002.

Key topics and requirements

• Overview of zinc coating types and characteristics (hot dip galvanizing, continuous galvanizing, mechanical and electrodeposited options).
• Design principles for fabrications intended for HDG (clearances, drainage, venting, distortion control, weld detail and sealers).
• Substrate and material considerations for steel to be galvanized.
• Recommended coating mass/thickness expectations and durability guidance for atmospheric categories.
• Surface preparation and compatibility with subsequent paint or maintenance coatings.
• Inspection, testing and acceptance criteria referenced to relevant product standards.
• References to related standards for galvanizing process requirements and testing (e.g., AS/NZS 4680 and related product specifications).

Typical use and users

Used by structural and corrosion engineers, specifiers, fabricators, galvanizing suppliers, asset owners, architects and maintenance planners who need to specify, design or assess hot dip galvanized steel for atmospheric exposure. It is typically referenced when preparing tender specifications, shop fabrication documents and maintenance/durability assessments.

Related standards

Commonly used alongside or referenced with: AS/NZS 2312.1 (paint coatings), AS/NZS 4680 (specification for hot dip galvanizing of fabricated articles), AS 1214 / AS 1397 (continuous galvanizing / sheet requirements), AS/NZS 4791 and 4792 (cold-formed galvanized sections), ISO 14713 (guidance on zinc coatings) and test/product standards for coating mass and adhesion. It supersedes or replaces the HDG guidance previously contained in AS/NZS 2312:2002 (in part).

Keywords

hot dip galvanizing, zinc coating, protective coatings, atmospheric corrosion, structural steel, specification, durability, AS/NZS 2312.2:2014

FAQ

Q: What is this standard?

A: Part 2 of the AS/NZS 2312 series: a design and specification guide for the protection of structural steel using hot dip galvanizing, published in December 2014.

Q: What does it cover?

A: Guidance on selecting and detailing steel for HDG, coating types and expected durability, surface preparation and how HDG interfaces with other coatings and fabrication processes. It is focused on atmospheric corrosion protection.

Q: Who typically uses it?

A: Structural engineers, corrosion engineers, fabricators, galvanizers, specifiers, asset owners and maintenance teams involved in design, procurement and life‑cycle planning for galvanized steelwork.

Q: Is it current or superseded?

A: Published in 2014 and listed as the relevant HDG guidance; catalogue listings show it as the current Part 2 edition while some publisher pages also indicate it is 'pending revision' in their product metadata—users should check the publisher catalogues for any formal revision or amendment notices before relying on the standard for live projects.

Q: Is it part of a series?

A: Yes — AS/NZS 2312 was reorganised into parts in 2014. Part 1 covers paint coatings (AS/NZS 2312.1) and Part 2 covers hot dip galvanizing (this document); a Part 3 covering other coating methods has been developed separately.

Q: What are the key keywords?

A: Hot dip galvanizing; zinc coatings; protective coatings; atmospheric corrosion; structural steel; specification; durability; AS/NZS 2312.2.