ISO 1461-2022 PDF

Full title and description

ISO 1461:2022 — Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods. This International Standard specifies general properties, inspection and acceptance criteria, and test methods for hot‑dip galvanized coatings applied by dipping fabricated iron and steel articles (including certain castings) in a zinc melt (zinc containing not more than 2 % of other metals).

Abstract

The standard defines the expected coating characteristics (continuity, appearance and cohesion), measurement and sampling procedures for coating thickness, acceptance criteria for lots and control samples, recommended practices for repair/renovation of uncoated or damaged areas, and notes on adhesion testing and special cases (for example, ultra‑low reactive steels). It also states product types and processes that are excluded (continuous galvanizing of sheet/wire/mesh, automatic tube/pipe galvanizing and products covered by specific product standards).

General information

• Status: Published.
• Publication date: 2 August 2022.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.40 (Metallic coatings).
• Edition / version: 4 (4th edition, 2022).
• Number of pages: 16.

Key bibliographic and lifecycle details above are taken from the ISO record for ISO 1461:2022.

Scope

ISO 1461:2022 applies to hot‑dip galvanizing of fabricated iron and steel articles (including some castings) carried out by immersion in a zinc bath (zinc with up to 2 % other metals). It excludes continuously galvanized sheet, wire and woven/welded mesh, tube and pipe galvanized in automatic plants, and items for which other product standards specify requirements (for example many types of fasteners). The standard does not cover after‑treatment or additional coatings applied after galvanizing.

Key topics and requirements

• Definitions and terminology related to control samples, reference areas and local/average galvanized coating thickness values.
• Sampling and acceptance inspection procedures — control sample sizes related to lot size and rules for acceptance/rejection scaling.
• Coating thickness measurement methods (magnetic/eddy‑current and gravimetric approaches referenced) and minimum local/mean/average thickness requirements by article category.
• Surface finish expectations — continuous, relatively smooth coating; aesthetic variation allowed; wet storage stain not a cause for rejection if thickness criteria are met.
• Renovation/repair rules — permitted repair methods (zinc‑rich paints/pastes, low‑melting zinc sticks, thermal zinc spraying) and minimum repair thickness guidance (typically 100 μm unless otherwise agreed).
• Adhesion/cohesion — practical guidance that no universally accepted international adhesion test for hot‑dip galvanizing currently exists; adhesion testing is by agreement and cohesion is generally considered a characteristic of a properly produced coating.
• Special provisions for steels with ultra‑low reactivity (composition factors affecting coating formation) and recommendations for preparation of flame/laser/plasma‑cut edges to improve coating quality.

Typical use and users

Engineers, fabricators, galvanizing works, quality managers, procurement/specification authors and inspectors use ISO 1461:2022 to specify, accept and inspect batch hot‑dip galvanizing of fabricated components and castings. The standard is referenced in product specifications, purchase orders, conformity certificates and design guidance for corrosion protection of steel structures. Galvanizing associations, testing laboratories and authorities responsible for corrosion protection also rely on the standard for harmonized test and acceptance practices.

Related standards

Commonly referenced standards and guidance include ISO 1460 (methods for inspection and measurement of zinc coatings), ISO 2178 (magnetic method for coating thickness), ISO 14713‑2 (guidance on design and specification for hot dip galvanizing), ISO 2063 (thermal metal spraying) and national/adopted variants (for example EN ISO 1461). Product‑specific standards for fasteners, tubes, wire and other items can impose different or additional requirements.

Keywords

hot‑dip galvanizing; zinc coating; coating thickness; coating adhesion; inspection; acceptance criteria; repair/renovation; fabricated steel; metallic coatings; ISO 1461.

FAQ

Q: What is this standard?

A: ISO 1461:2022 is the International Standard that specifies requirements and test methods for hot‑dip galvanized coatings applied to fabricated iron and steel articles by immersion in molten zinc.

Q: What does it cover?

A: It covers general coating properties, sampling and inspection procedures, measurement and acceptance criteria for coating thickness, guidance on repair/renovation of uncoated areas, and notes on adhesion and special material cases. It excludes continuous galvanizing of sheet/wire/mesh, automatic tube/pipe galvanizing and products governed by their own specific standards.

Q: Who typically uses it?

A: Steel fabricators, galvanizers, design/specification engineers, quality and inspection personnel, testing laboratories and procurement officers use the standard to define and verify acceptable hot‑dip galvanizing for fabricated components and castings.

Q: Is it current or superseded?

A: Current — ISO 1461:2022 (4th edition) published on 2 August 2022 supersedes the previous edition ISO 1461:2009.

Q: Is it part of a series?

A: It is part of the body of standards and guidance on zinc and metallic coatings (for example ISO 1460, ISO 2178, ISO 14713‑2, ISO 2063). Product‑specific standards may incorporate or reference ISO 1461 for the galvanized coating on their items.

Q: What are the key keywords?

A: Hot‑dip galvanizing, zinc coating, coating thickness, inspection, acceptance criteria, repair, adhesion, metallic coatings, fabricated steel.