SIST EN ISO 1461:2022

Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods (ISO 1461:2022)

This document specifies the general properties of hot dip galvanized coatings and test methods for hot dip galvanized coatings applied by dipping fabricated iron and steel articles (including certain castings) in a zinc melt (containing not more than 2 % of other metals). This document does not apply to the following:
a) sheet, wire and woven or welded mesh products that are continuously hot dip galvanized;
b) tube and pipe that are hot dip galvanized in automatic plants;
c) hot dip galvanized products (e.g. fasteners) for which specific standards exist and which can include additional requirements or requirements which are different from those of this document.
NOTE      Individual product standards can incorporate this document for the galvanized coating by quoting its number, or can incorporate it with modifications specific to the product. Different requirements can also be made for galvanized coatings on products intended to meet specific regulatory requirements.
This document does not apply to after-treatment or additional coating of hot dip galvanized articles.

Durch Feuerverzinken auf Stahl aufgebrachte Zinküberzüge (Stückverzinken) - Anforderungen und Prüfungen (ISO 1461:2022)

Dieses Dokument legt die allgemeinen Anforderungen an die Eigenschaften und Prüfungen von Feuerverzinkungsüberzügen fest, die durch Eintauchen von gefertigten Eisen  und Stahlbauteilen (einschließlich bestimmter Gussteile) in eine Zinkschmelze (die nicht mehr als 2 % andere Metalle enthält) aufgebracht werden. Dieses Dokument ist nicht anzuwenden für:
a)   Band, Draht und gewebte und geschweißte Metallprodukte, die kontinuierlich feuerverzinkt sind;
b)   Rohre, die in automatischen Anlagen feuerverzinkt werden;
c)   feuerverzinkte Produkte (z. B. Verbindungselemente), für die spezifische Normen existieren und die zusätzliche Anforderungen oder Anforderungen, die von diesem Dokument abweichen, enthalten können.
ANMERKUNG   Eigenständige Produktnormen können für Zinküberzüge Bezug auf dieses Dokument nehmen indem sie es zitieren und es einschließen, oder sie können es mit Änderungen, die sich auf das genormte Produkt beziehen, übernehmen. Abweichende Anforderungen können an Zinküberzüge auf Produkten gestellt werden, die besonderen behördlichen Anforderungen unterliegen.
Dieses Dokument ist nicht anzuwenden für die Nachbehandlung oder zusätzliche Beschichtung von feuerverzinkten Bauteilen.

Revêtements par galvanisation à chaud sur produits finis en fonte et en acier - Spécifications et méthodes d'essai (ISO 1461:2022)

Le présent document spécifie les propriétés générales des revêtements de galvanisation à chaud et les méthodes d’essais relatives aux revêtements de galvanisation à chaud appliqués par immersion de pièces en fonte ou acier (y compris certaines pièces moulées) dans un bain de zinc (ne contenant pas plus de 2 % d’autres métaux). Le présent document ne s’applique pas :
a) aux tôles, aux fils et produits en treillis tissés ou soudés, galvanisés à chaud en continu ;
b) aux tubes et canalisations galvanisés à chaud dans des installations automatisées ;
c) aux produits galvanisés à chaud (par exemple les éléments de fixation) pour lesquels des normes spécifiques existent pouvant inclure des exigences supplémentaires ou différentes par rapport à celles contenues dans le présent document.
NOTE      Les normes de produits peuvent incorporer le présent document relatif aux revêtements de galvanisation en citant son numéro ou en y ajoutant des modifications spécifiques au produit. Des exigences différentes peuvent également être énoncées pour la galvanisation de produits conçus pour répondre à des exigences réglementaires spécifiques.
Le présent document ne s’applique pas aux post-traitements ou aux revêtements supplémentaires sur pièces galvanisées à chaud.

Prevleke na železnih in jeklenih predmetih, nanesene z vročim pocinkanjem - Specifikacije in metode preskušanja (ISO 1461:2022)

Ta dokument določa splošne lastnosti prevlek, nanesenih z vročim pocinkanjem, in preskusne metode za vroče pocinkane prevleke, nanesene s potapljanjem izdelkov iz železa in jekla (vključno z določenimi ulitki) v cinkovo talino (ki ne vsebuje več kot 2 % drugih kovin). Ta dokument se ne uporablja za: a) izdelke iz pločevine, žice in spletene ali varjene mreže, ki so neprekinjeno vroče cinkani; b) cevi, ki jih vroče cinkajo v avtomatskih obratih; c) vroče cinkane izdelke (npr. pritrdilne elemente), za katere obstajajo posebni standardi z dodatnimi zahtevami ali zahtevami, ki se razlikujejo od zahtev v tem dokumentu. OPOMBA: V posameznih standardih za izdelke se lahko ta dokument uporabi za cinkane prevleke z navedbo številke dokumenta ali pa s spremembami, prilagojenimi posameznemu izdelku. Za cinkane prevleke na izdelkih, ki morajo izpolnjevati posebne regulativne zahteve, se lahko predpišejo tudi drugačne zahteve. Ta dokument se ne uporablja za naknadno obdelavo ali nanos dodatnih prevlek na vroče cinkane izdelke.

General Information

• Status: Published
• Public Enquiry End Date: 30-Nov-2021
• Publication Date: 09-Oct-2022
• ICS: 25.220.40 - Metallic coatings
• Technical Committee: IPKZ - Protection of metals against corrosion
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 28-Sep-2022
• Due Date: 03-Dec-2022
• Completion Date: 10-Oct-2022
• Ref Project: EN ISO 1461:2022 - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods (ISO 1461:2022)

Relations

• Replaces: SIST EN ISO 1461:2009 - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods (ISO 1461:2009)
• Effective Date: 28-Sep-2022

Overview

EN ISO 1461:2022 - Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods - is the European adoption of ISO 1461:2022. It specifies general properties, acceptance criteria and test methods for batch hot dip galvanizing (dipping fabricated iron and steel articles, including certain castings, in a zinc melt containing ≤ 2% other metals). This edition supersedes EN ISO 1461:2009 and includes updated definitions, inspection and renovation guidance, and revised requirements for coating thickness and corrosion resistance.

The standard does NOT apply to:

• continuously hot-dip galvanized sheet, wire, or woven/welded mesh;
• tube and pipe galvanized in automatic plants;
• products covered by specific standards (e.g., certain fasteners) where different requirements apply;
• after‑treatment or additional coatings applied after galvanizing.

Key topics and technical requirements

• General requirements for batch hot dip galvanizing, including bath composition and safety considerations.
• Information to be supplied by the purchaser (details on product, surface condition, special requirements) - see Annex A.
• Acceptance inspection and sampling procedures (references to ISO sampling plans).
• Galvanized coating properties:
  • Appearance (including handling of flux residues and zinc ash in restricted areas).
  • Galvanized coating mass and thickness - measurement methods and selection of reference areas (see ISO 1460, ISO 2178 and Annex D).
  • Adhesion and renovation (requirements and acceptable repair methods; Annex C).
  • Acceptance criteria for batch lots (coating thickness and other performance indicators).
• Declaration of compliance and documentation (inspection records, control samples).
• Normative and informative annexes covering information to be supplied, safety and process requirements, renovation guidance, thickness determination, and corrosion resistance (references include ISO 9224 and ISO 14713‑2).

Practical applications

EN ISO 1461:2022 is used to ensure reliable corrosion protection and consistent coating quality for fabricated steel components in:

• structural steelwork (beams, columns, connections),
• civil infrastructure (bridges, handrails, fencing, street furniture),
• utility structures (transmission towers, poles),
• fabricated castings and miscellaneous steel articles requiring batch galvanizing.

The standard supports quality control, procurement specifications, and long‑term corrosion performance planning by defining how coatings are tested and accepted.

Who uses this standard

• Galvanizers and galvanizing plant operators for process control and certification.
• Steel fabricators and manufacturers specifying hot dip galvanizing.
• Purchasers, spec writers and project engineers preparing procurement documents.
• Quality inspectors, corrosion engineers and compliance bodies performing acceptance testing and verification.

Related standards

EN ISO 1461 references other key documents for measurement and materials, such as ISO 1460 (gravimetric mass), ISO 2178 (thickness measurement), ISO 9224 (corrosion assessment) and sampling standards ISO 2859. Use these together for complete inspection and compliance programs.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN ISO 1461:2009
Prevleke na železnih in jeklenih predmetih, nanesene z vročim pocinkanjem -
Specifikacije in metode preskušanja (ISO 1461:2022)
Hot dip galvanized coatings on fabricated iron and steel articles - Specifications and test
methods (ISO 1461:2022)
Durch Feuerverzinken auf Stahl aufgebrachte Zinküberzüge (Stückverzinken) -
Anforderungen und Prüfungen (ISO 1461:2022)
Revêtements par galvanisation à chaud sur produits finis en fonte et en acier -
Spécifications et méthodes d'essai (ISO 1461:2022)
Ta slovenski standard je istoveten z: EN ISO 1461:2022
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1461
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 25.220.40 Supersedes EN ISO 1461:2009
English Version
Hot dip galvanized coatings on fabricated iron and steel
articles - Specifications and test methods (ISO 1461:2022)
Revêtements par galvanisation à chaud sur produits Durch Feuerverzinken auf Stahl aufgebrachte
finis en fonte et en acier - Spécifications et méthodes Zinküberzüge (Stückverzinken) - Anforderungen und
d'essai (ISO 1461:2022) Prüfungen (ISO 1461:2022)
This European Standard was approved by CEN on 15 September 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1461:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1461:2022) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2023, and conflicting national standards shall
be withdrawn at the latest by March 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 1461:2009.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 1461:2022 has been approved by CEN as EN ISO 1461:2022 without any modification.

INTERNATIONAL ISO
STANDARD 1461
Fourth edition
2022-08
Hot dip galvanized coatings on
fabricated iron and steel articles —
Specifications and test methods
Revêtements par galvanisation à chaud sur produits finis en fonte et
en acier — Spécifications et méthodes d'essai
Reference number
ISO 1461:2022(E)
ISO 1461:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 1461:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 3
4.1 General . 3
4.2 Hot dip galvanizing bath . 4
4.3 Information to be supplied by the purchaser. 4
4.4 Safety. 4
5 Acceptance inspection and sampling . 4
6 Galvanized coating properties . 4
6.1 Appearance . 4
6.2 Thickness . 5
6.2.1 General . 5
6.2.2 Test methods . 5
6.2.3 Reference areas . 6
6.3 Renovation . 7
6.4 Adhesion . 7
6.5 Acceptance criteria . 8
7 Declaration of compliance . 9
Annex A (normative) Information to be supplied .10
Annex B (normative) Safety and process requirements .12
Annex C (informative) Renovation of uncoated or damaged areas .13
Annex D (informative) Determination of thickness .14
Annex E (informative) Corrosion resistance of galvanized coatings .15
Bibliography .16
iii
ISO 1461:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings,
Subcommittee SC 4, Hot dip coatings (galvanized, etc.), in collaboration with the European Committee
for Standardization (CEN) Technical Committee CEN/TC 262, Metallic and other inorganic coatings, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 1461:2009), which has been technically
revised.
The main changes are as follows:
— definitions have been added for ‘galvanizer’, ‘after-treatment’, ‘additional coating’, ‘wet storage
stain’ and ‘duplex system’ in Clause 3;
— the difficulty to remove flux residues and zinc ash when access is restricted has been recognised in
6.1;
— procedures for choice of reference areas have been clarified and additional requirements to avoid
reference areas on certain small ancillary elements on a larger article have been added in 6.2.3;
— requirements for renovation of uncoated areas have been revised: the requirements for the pigment
of a zinc-containing paint to conform with ISO 3549 have been removed; Annex C has been extended
to include additional information on the suitability of different methods of renovation given in 6.3;
— all requirements related to coating thickness, including Table 3 and Table 4, have been placed
within 6.5, including requirements linked to the size of the article in the control sample previously
within 6.2.3; the lower coating thicknesses that can result in ultra-low reactive steels are recognised
in new requirements for these steel types in 6.5;
— information on corrosion resistance of galvanized coatings has been updated, including the
reference to ISO 9224 for longer-term corrosion resistance in Annex E.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 1461:2022(E)
Hot dip galvanized coatings on fabricated iron and steel
articles — Specifications and test methods
1 Scope
This document specifies the general properties of hot dip galvanized coatings and test methods for
hot dip galvanized coatings applied by dipping fabricated iron and steel articles (including certain
castings) in a zinc melt (containing not more than 2 % of other metals). This document does not apply
to the following:
a) sheet, wire and woven or welded mesh products that are continuously hot dip galvanized;
b) tube and pipe that are hot dip galvanized in automatic plants;
c) hot dip galvanized products (e.g. fasteners) for which specific standards exist and which can
include additional requirements or requirements which are different from those of this document.
NOTE Individual product standards can incorporate this document for the galvanized coating by quoting
its number, or can incorporate it with modifications specific to the product. Different requirements can also be
made for galvanized coatings on products intended to meet specific regulatory requirements.
This document does not apply to after-treatment or additional coating of hot dip galvanized articles.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 752, Zinc ingots
ISO 1460, Metallic coatings — Hot dip galvanized coatings on ferrous materials — Gravimetric
determination of the mass per unit area
ISO 2064, Metallic and other inorganic coatings — Definitions and conventions concerning the measurement
of thickness
ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic
method
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 2859-2, Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by limiting
quality (LQ) for isolated lot inspection
ISO 2859-3, Sampling procedures for inspection by attributes — Part 3: Skip-lot sampling procedures
ISO 10474, Steel and steel products — Inspection documents
ISO 14713-2:2019, Zinc coatings — Guidelines and recommendations for the protection against corrosion
of iron and steel in structures — Part 2: Hot dip galvanizing
EN 1179, Zinc and zinc alloys — Primary zinc
EN 13283, Zinc and zinc alloys — Secondary zinc
ISO 1461:2022(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2064 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org
3.1
hot dip galvanizing
formation of a galvanized coating of either zinc or zinc iron alloys, or both, on fabricated iron or steel
articles by dipping in a zinc melt (3.16)
3.2
hot dip galvanized coating
galvanized coating
coating obtained by batch hot dip galvanizing (3.1)
3.3
galvanizer
company or organisation that operates a plant for the hot dip galvanizing (3.1) of batches of fabricated
iron or steel articles
3.4
galvanized coating mass
either total mass of zinc or zinc alloys per area of surface, or both
Note 1 to entry: The galvanized coating mass is expressed in grams per square metre, g/m .
3.5
galvanized coating thickness
either total thickness of zinc or zinc alloys, or both
Note 1 to entry: The thickness is expressed in micrometres, µm.
3.6
significant surface
part of the article covered or to be covered by the galvanized coating and for which the galvanized
coating is essential for either serviceability or appearance, or both
3.7
control sample
article or group of articles from a lot that is selected for sampling
3.8
reference area
area within which a specific number of single measurements are made
3.9
local galvanized coating thickness
mean value of galvanized coating thickness (3.5) obtained from the specific number of measurements
within a reference area (3.8) for a magnetic test or the single value from a gravimetric test
3.10
mean galvanized coating thickness
average value of the local galvanized coating thicknesses (3.9)
3.11
local galvanized coating mass
value of galvanized coating mass (3.4) obtained from a single gravimetric test
ISO 1461:2022(E)
3.12
mean galvanized coating mass
average value of the galvanized coating masses (3.4) determined either by using a control sample (3.7) or
by conversion of the mean galvanized coating thickness (3.10)
Note 1 to entry: The control sample shall be selected in accordance with Clause 5 using tests in accordance with
ISO 1460.
3.13
inspection lot
single order or single delivery load
3.14
acceptance inspection
inspection of an inspection lot (3.13) at the hot dip galvanizing (3.1) plant, unless otherwise specified
3.15
uncoated area
area on the iron or steel articles that does not react with the molten zinc
3.16
zinc melt
molten mass containing primarily zinc
3.17
weld seepage
emission of previously retained pre-treatment solutions from narrow spaces between two closely
contacting surfaces that have been subject to intermittent welding or from very small cavities (pinholes)
in the welds of a galvanized article
3.18
after-treatment
immediate application of chemical or other treatments with temporary effects such as inhibition of wet
storage stain (3.20) or to enhance appearance of galvanized articles
3.19
additional coating
application of coating layers, such as liquid paints or powder coating, after galvanizing as part of a
duplex system (3.21)
3.20
wet storage stain
surface stain resulting from the formation of zinc corrosion products (usually zinc hydroxide and zinc
oxide) when freshly galvanized steel is stored or transported in moist or humid conditions
3.21
duplex system
hot dip galvanized coating (3.2) with an additional liquid paint or powder coating
4 General requirements
4.1 General
This document sets out requirements for the contents of the zinc melt used to apply a galvanized
coating to articles (see 4.2). The chemical composition and the surface condition (finish and roughness)
of the basis metal, the mass of the parts and the galvanizing conditions can affect the appearance,
thickness, texture, and physical and mechanical properties of the galvanized coating. This document
does not specify any requirements regarding these points. Guidance on these parameters can be found
in ISO 14713-2.
ISO 1461:2022(E)
4.2 Hot dip galvanizing bath
The hot dip galvanizing bath shall primarily contain molten zinc. The total of the other elements as
identified in ISO 752, EN 1179 or EN 13283, excluding tin and iron, in the molten zinc shall not exceed
1,5 % by mass.
4.3 Information to be supplied by the purchaser
The information listed in Clauses A.1 and A.2 shall be supplied by the purchaser.
4.4 Safety
Venting and draining shall be provided in accordance with Annex B.
5 Acceptance inspection and sampling
Acceptance inspection can be undertaken by, or on behalf of, the purchaser and shall be undertaken
before the products leave the galvanizer’s custody, unless otherwise specified at the time of ordering
by the purchaser. Acceptance inspection involves assessment of the appearance of the surface of the
galvanized article and testing of the galvanized coating thickness. Adhesion tests are normally not
carried out and are only tested by agreement (see 6.4).
If the purchaser requests it, a control sample for thickness testing shall be taken randomly from each
inspection lot selected for testing. Unless otherwise agreed, the minimum number of articles from each
inspection lot that forms the control sample shall be in accordance with Table 1.
Table 1 — Control sample size related to lot size
Minimum number of articles in
Number of articles in lot
the control sample
1 to 3 All
4 to 500 3
501 to 1 200 5
1 201 to 3 200 8
3 201 to 10 000 13
>10 000 20
6 Galvanized coating properties
6.1 Appearance
At acceptance inspection, the visible significant surface(s) of all the hot dip galvanized article(s), when
first examined by normal or corrected vision from a distance of not less than 1 m, shall be free from
blisters (i.e. raised areas without solid metal beneath), roughness and sharp points (if that roughness
or sharp point can cause injury) and uncoated areas. It shall be recognised that “roughness” is a relative
term and the roughness of galvanized coatings on articles galvanized after fabrication differs from that
[14] [19]
of mechanically-wiped products, such as hot dip coated sheet (e.g. see EN 10143 or EN 10346 ),
[17] [18]
tube (e.g. see EN 10240 ) and wire (e.g. see EN 10244-2 ).
The primary purpose of the galvanized coating is to protect the iron or steel articles against corrosion.
Considerations related to aesthetics or decorative features should be secondary. Where these secondary
features are also of importance, it is highly recommended that the galvanizer and purchaser agree upon
the standard of finish that is achievable on the articles (in total or in part), given the range of materials
used to form the article (see ISO 14713-2). This is of particular importance where the required standard
ISO 1461:2022(E)
of finish is beyond that set out in this subclause. In practice, it is not possible to establish a definition of
appearance and finish covering all requirements.
The occurrence of darker or lighter areas (e.g. cellular pattern or dark grey areas) or some surface
unevenness (e.g. ‘orange peel’) shall not be a cause for rejection (see 4.1). The development of wet
storage stain shall not be a cause for rejection, providing the galvanized coating thickness remains
above the specified minimum value of the galvanized coating thickness (see 6.5).
NOTE 1 In certain circumstances, for example, where the galvanized article will receive a further treatment
or application of additional coatings, the purchaser can ask the galvanizer either:
a) not to quench the article or apply an after-treatment,
b) to take measures during storage and transport to prevent the formation of corrosion products on the surface
of the galvanized coating, or
c) both.
Flux residues and zinc ash shall be removed where they can affect the intended use of the hot dip
galvanized article, or its corrosion resistance requirement, unless access is restricted, for example,
inside hollow sections.
Aesthetic effects (e.g. weld seepage resulting from the use of intermittent welds around overlapping
surfaces in the fabrication) shall not be a cause for rejection.
NOTE 2 Use of this intermittent of welding often results from consideration of health and safety issues during
galvanizing (see Annex B). Further guidance is given in ISO 14713-2.
Articles that fail visual inspection shall be renovated in accordance with 6.3. Otherwise, the articles
shall be re-galvanized and resubmitted for inspection.
When particular requirements exist (such as when the galvanized coating shall be painted), a sample
shall be produced [see Clause A.2, f)] at the purchaser's request.
6.2 Thickness
6.2.1 General
Galvanized coatings are designed t
...