SIST EN ISO 9717:2018
(Main)Metallic and other inorganic coatings - Phosphate conversion coating of metals (ISO 9717:2017)
Metallic and other inorganic coatings - Phosphate conversion coating of metals (ISO 9717:2017)
This document specifies a process for the confirmation of requirements for phosphate coatings which
are usually destined for application on ferrous materials, zinc, cadmium and their alloys (see Annex B).
Metallische und andere anorganische Überzüge - Phosphatüberzüge auf Metallen (ISO 9717:2017)
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion au phosphate sur métaux (ISO 9717:2017)
ISO 9717:2017 spécifie un procédé pour la confirmation des exigences relatives aux couches de phosphate qui sont généralement destinées à être produites sur les matériaux ferreux, le zinc, le cadmium et leurs alliages (voir Annexe B).
Kovinske in druge anorganske prevleke - Fosfatne prevleke na kovinah (ISO 9717:2017)
Ta dokument določa postopek za potrditev zahtev za fosfatne prevleke, ki so običajno namenjene za nanos na železove materiale, cink, kadmij in njihove zlitine (glej dodatek B).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 9717:2018
01-januar-2018
1DGRPHãþD
SIST EN ISO 9717:2014
Kovinske in druge anorganske prevleke - Fosfatne prevleke na kovinah (ISO
9717:2017)
Metallic and other inorganic coatings - Phosphate conversion coating of metals (ISO
9717:2017)
Metallische und andere anorganische Überzüge - Phosphatüberzüge auf Metallen (ISO
9717:2017)
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion
au phosphate sur métaux (ISO 9717:2017)
Ta slovenski standard je istoveten z: EN ISO 9717:2017
ICS:
25.220.40 Kovinske prevleke Metallic coatings
SIST EN ISO 9717:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 9717:2018
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SIST EN ISO 9717:2018
EN ISO 9717
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 25.220.20 Supersedes EN ISO 9717:2013
English Version
Metallic and other inorganic coatings - Phosphate
conversion coating of metals (ISO 9717:2017)
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Couches de conversion au phosphate Phosphatüberzüge auf Metallen (ISO 9717:2017)
sur métaux (ISO 9717:2017)
This European Standard was approved by CEN on 21 September 2017.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9717:2017 E
worldwide for CEN national Members.
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SIST EN ISO 9717:2018
EN ISO 9717:2017 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 9717:2018
EN ISO 9717:2017 (E)
European foreword
This document (EN ISO 9717:2017) 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 April 2018, and conflicting national standards shall be
withdrawn at the latest by April 2018.
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 9717:2013.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 9717:2017 has been approved by CEN as EN ISO 9717:2017 without any modification.
3
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SIST EN ISO 9717:2018
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SIST EN ISO 9717:2018
INTERNATIONAL ISO
STANDARD 9717
Third edition
2017-09
Metallic and other inorganic
coatings — Phosphate conversion
coating of metals
Revêtements métalliques et autres revêtements inorganiques —
Couches de conversion au phosphate sur métaux
Reference number
ISO 9717:2017(E)
©
ISO 2017
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SIST EN ISO 9717:2018
ISO 9717:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 9717:2018
ISO 9717:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information to be supplied by the purchaser to the processor . 1
5 Coating types and their importance . 2
5.1 Coating types . 2
5.2 Designation of conversion coating . 2
6 Requirements . 3
6.1 Appearance . 3
6.2 Coating mass per unit area . 3
6.3 Post treatments . 3
6.4 Correlation of coating thickness and area-related mass . 4
7 Heat treatment . 4
Annex A (normative) Determination of phosphate conversion coating resistance to neutral
salt spray test . 5
Annex B (informative) General information. 8
Annex C (informative) Identification of phosphate conversion coating .11
Bibliography .13
© ISO 2017 – All rights reserved iii
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SIST EN ISO 9717:2018
ISO 9717:2017(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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings,
Subcommittee SC 8, Chemical conversion coatings.
This third edition cancels and replaces the second edition (ISO 9717:2010), which has been technically
revised. The following changes have been made:
— the Scope has been clarified;
— the Normative references have been updated;
— the Terms and definitions have been replaced by a reference to ISO 2080;
— Clause 4 has been revised;
— the terms in Clause 5 have been revised;
— requirements for the phosphate layer have been revised;
— statements on corrosion resistance have been shifted to a new Annex A;
— Annex B on salt spray testing has been revised;
— Annex C to the properties of the phosphate layers has been revised.
iv © ISO 2017 – All rights reserved
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SIST EN ISO 9717:2018
ISO 9717:2017(E)
Introduction
Phosphate conversion coatings are applied to ferrous metals, aluminium, zinc and their alloys (including
zinc- and zinc-alloy-plated steel, cadmium and their alloys) either as an end finish or as an intermediate
layer for other coatings. They are intended to
— impart corrosion resistance,
— improve adhesion to paints and other organic finishes,
— facilitate cold-forming operations, such as wire drawing, tube drawing and extrusion, and
— modify surface frictional properties so as to facilitate sliding.
Phosphate conversion coatings are produced by treatment with solutions, the main constituents of
which are the appropriate dihydrogen orthophosphates. These coatings are applied principally to
ferrous materials and zinc, and differ in coating mass per unit area and apparent density, depending on
— the construction material and surface condition of the components,
— previous mechanical and chemical treatment of the components, and
— processing conditions for phosphating.
All phosphate conversion coatings are more or less porous but can be sealed substantially by subsequent
sealant processes.
© ISO 2017 – All rights reserved v
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SIST EN ISO 9717:2018
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SIST EN ISO 9717:2018
INTERNATIONAL STANDARD ISO 9717:2017(E)
Metallic and other inorganic coatings — Phosphate
conversion coating of metals
WARNING — This document calls for the use of substances and/or procedures that could be
injurious to health if adequate safety measures are not taken. This document does not address any
health hazards, safety or environmental matters associated with its use. It is the responsibility
of the producers, purchasers and/or users of this document to establish appropriate health,
safety and environmentally acceptable practices and take appropriate actions.
1 Scope
This document specifies a process for the confirmation of requirements for phosphate coatings which
are usually destined for application on ferrous materials, zinc, cadmium and their alloys (see Annex B).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 2080, Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic
coatings — Vocabulary
ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area —
Gravimetric methods
ISO 4519, Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by
attributes
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2080 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Information to be supplied by the purchaser to the processor
The following information shall be provided by the purchaser.
a) A description of the coating according to this document, i.e. ISO 9717 (see 5.2).
b) In cases of phosphating steel parts with tensile strength ≥ 1 000 MPa, possibly also locally
restricted, e.g. for case-hardened or cold-formed structures or in weld seam areas, the safety
against brittle fracture (hydrogen embrittlement) is of primary importance. The phosphatising
process shall be carried out in such a manner that any damage caused by hydrogen-induced
brittleness is excluded. Technical measures to minimize the risk of hydrogen-induced brittleness
shall be defined by the user and provided by the supplier/customer. Heat treatment in accordance
© ISO 2017 – All rights reserved 1
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SIST EN ISO 9717:2018
ISO 9717:2017(E)
with any recommendations cannot guarantee full freedom from hydrogen embrittlement. The
performance of the heat treatment shall be demonstrated by the supplier.
c) The sampling procedure, the acceptable quality limit or any other requirements and tests that
deviate from ISO 4519.
d) The surface treatment or phosphating.
e) The appearance of the surface.
f) The corrosion resistance.
g) The quality, appearance and condition of basis metal, if any of these properties affect the usability
and/or appearance of coatings.
h) Where applicable, technical measures to minimize the risk of hydrogen induced brittleness as
defined by the user.
5 Coating types and their importance
5.1 Coating types
The conversion coating shall be declared according to Table 1.
Table 1 — Declaration of conversion coatings
Elements detected Coating type
Iron (II) Feph
Manganese Mnph
Zinc (no Calcium) Znph
Zinc and Calcium ZnCaph
There are other coating types of zinc phosphate that are altered because of the build-in of iron
and/or nickel and/or manganese. This altered metal is usually present as a double salt, such as
Zn ME(PO ) x 4 H O, whereby ME can be Fe(II), Ni or Mn. Zn will continue to be the main metal
2 4 2 2
element of those coatings, which do not have separate markings in order to avoid confusion. It should
also be noted that metal taken from the basis material is included in the conversion coating.
Information for coating characteristics can be found in Annex B and the identification methods can be
found in Annex C.
5.2 Designation of conversion coating
The designation of the conversion coating shall consist of the following information:
a) number of this document, i.e. ISO 9717, and the designation “phosphate coating”;
b) followed by a hyphen;
c) designation of basis material: by means of the material chemical symbol (or the symbol of the
primary alloy components);
d) followed by a solidus(/);
e) a symbol describing the type
...
SLOVENSKI STANDARD
oSIST prEN ISO 9717:2016
01-junij-2016
Kovinske in druge anorganske prevleke - Fosfatne prevleke na kovinah (ISO/DIS
9717)
Metallic and other inorganic coatings - Phosphate conversion coating of metals
Metallische und andere anorganische Überzüge - Phosphatüberzüge auf Metallen
Revêtements métalliques et autres revêtements inorganiques - Couches de conversion
au phosphate sur métaux
Ta slovenski standard je istoveten z: prEN ISO 9717
ICS:
25.220.40 Kovinske prevleke Metallic coatings
oSIST prEN ISO 9717:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 9717:2016
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oSIST prEN ISO 9717:2016
DRAFT INTERNATIONAL STANDARD
ISO/DIS 9717
ISO/TC 107/SC 8 Secretariat: KATS
Voting begins on: Voting terminates on:
2016-04-28 2016-07-27
Metallic and other inorganic coatings — Phosphate
conversion coating of metals
Revêtements métalliques et autres revêtements inorganiques — Couches de conversion au phosphate
sur métaux
ICS: 25.220.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 9717:2016(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2016
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oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(E)
Contents Page
Foreword . v
Introduction. v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Information to be supplied by the purchaser to the processor .1
5 Coating types and their importance.2
5.1 Coating types .2
5.2 Designation of conversion coating .2
6 Requirements.3
6.1 Appearance .3
6.2 Coating mass per unit area.3
6.3 Corrosion resistance.3
Annex A (normative) Determination of corrosion resistance.5
Annex B (normative) Determination of resistance of phosphate conversion coating to neutral
salt spray test .6
B.1 Determination of resistance of phosphate conversion coatings to neutral salt spray test
without supplementary treatments or organic coatings .6
B.2 Determination of resistance of phosphate conversion coatings, which have been
subsequently treated with corrosion-preventing oils, to neutral salt spray test .6
B.2.1 Principle .6
B.2.2 Supplementary treatment .7
B.2.3 Procedure .7
Annex C (informative) Introductory information.8
C.1 General.8
C.2 Surface preparations .8
C.3 Application technology .9
C.4 Application of phosphate coatings .9
C.4.1 Cold Forming .9
C.4.2 Sliding action .9
C.4.3 Application of phosphate conversion coatings to improve corrosion resistance. 10
Annex D (informative) Identification of phosphate conversion coating. 11
D.1 General. 11
D.2 Method 1 . 11
D.2.1 Principle . 11
D.2.2 Reagents . 11
D.2.3 Apparatus . 11
D.2.4 Test specimen . 11
D.2.5 Procedure . 11
D.3 Method 2 . 11
D.4 Interpretation of results . 11
Bibliography . 13
iv © ISO 2016 – All rights reserved
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oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(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 on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 107/SC 8, Chemical conversion coatings.
© ISO 2016 – All rights reserved v
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oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(E)
Introduction
Phosphate conversion coatings are applied to ferrous metals, aluminium, zinc and their alloys (including
zinc- and zinc-alloy-plated steel, cadmium and their alloys) either as an end finish or as an intermediate
layer for other coatings. They are intended to
a) impart corrosion resistance,
b) improve adhesion to paints and other organic finishes,
c) facilitate cold-forming operations, such as wire drawing, tube drawing and extrusion, and
d) modify surface frictional properties so as to facilitate sliding.
Phosphate conversion coatings are produced by treatment with solutions, the main constituents of which are
the appropriate dihydrogen orthophosphates. These coatings are applied principally to ferrous materials,
aluminium, zinc and cadmium and differ in coating mass per unit area and apparent density, depending on
a) the construction material and surface condition of the components,
b) previous mechanical and chemical treatment of the components, and
c) processing conditions for phosphating.
All phosphate conversion coatings are more or less porous but can be sealed substantially by subsequent
sealing processes.
vi © ISO 2016 – All rights reserved
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oSIST prEN ISO 9717:2016
DRAFT INTERNATIONAL STANDARD ISO/DIS 9717:2016(E)
Metallic and other inorganic coatings — Phosphate conversion
coating of metals
WARNING — This International Standard may not be compliant with some countries' health, safety
and environmental legislations and calls for the use of substances and/or procedures that may be
injurious to health if adequate safety measures are not taken. This International Standard does not
address any health hazards, safety or environmental matters and legislations associated with its use.
It is the responsibility of the producers, purchasers and/or user of this International Standard to
establish appropriate health, safety and environmentally acceptable practices and take appropriate
actions to comply with any national, regional and/or international rules and regulations. Compliance
with this International Standard does not in itself confer immunity from legal obligations.
1 Scope
This International Standard specifies a process for the determination of requirements for phosphate coatings
which are basically destined for application on ferrous material, aluminium, zinc, cadmium and there alloys
(see Annex A).
2 Normative references
The following referenced documents are indispensable for the application 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 2080, Metallic and other inorganic coatings — Surface treatment, metallic and other inorganic coatings —
Vocabulary
ISO 3892, Conversion coatings on metallic materials — Determination of coating mass per unit area —
Gravimetric methods
ISO 4519, Electrodeposited metallic coatings and related finishes — Sampling procedures for inspection by
attributes
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2080 apply.
4 Information to be supplied by the purchaser to the processor
The following information shall be given by the customer:
a) description of coating;
b) in case of phosphating steel parts with a strength class 10.9/10, the safety against brittle fracture
(hydrogen embrittlement) is of primary importance. The phosphatising process must be carried out in
such a manner that that any damage because of hydrogen induced brittleness is excluded. Technical
© ISO 2016 – All rights reserved 1
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oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(E)
measures to minimise the risk of hydrogen induced brittleness have to be defined by the user
respectively by the customer;
c) the sampling procedure, the acceptable quality limit or any other requirement and test whenever they
deviate from ISO 4519;
d) the surface treatment or phosphating;
e) the appearance of the surface;
f) the corrosion resistance;
g) the quality, appearance and condition of base metal, if any of these properties affect the usability and
/or appearance of coatings.
Heat treatment in accordance with the recommendations cannot guarantee full freedom from hydrogen
embrittlement. Inspection procedures should be set whenever possible.
5 Coating types and their importance
5.1 Coating types
The conversion coating shall be declared according to Table 1.
Table 1 — Declaration of conversion coatings
Elements detected Coating type
Me (Fe) Feph
Manganese Mnph
Zinc (no Calcium) Znph
Zinc and calcium ZnCaph
There are other coating types of zinc phosphate, which are altered because of the build-in of iron and/or
ME(PO ) x 4 H O,
nickel and /or manganese. This altered metal is usually present as a double salt, like Zn
2 4 2 2
whereby ME can be Fe(II), Ni or Mn. Zinc will continue to be the main metal part of those coatings, which do
not have an own marking to avoid confusion. It should also be noted that metal taken from the basic
material, is included in the conversion coating.
5.2 Designation of conversion coating
The designation of the conversion coating shall consist of the following information:
a) number of this standard;
b) followed by a hyphen;
c) designation of basic material; by means of the material chemical symbol (or the symbol of the primary
alloy components) (see Note 1);
d) followed by a solidus(/);
e) a symbol describing the type of coating;
2 © ISO 2016 – All rights reserved
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oSIST prEN ISO 9717:2016
ISO/DIS 9717:2016(E)
f) solidus (/);
g) a symbol, which indicates the function of the conversion coating as follows:
r = adhesion promoter and/or corrosion protection
z = Simplification of cold forming
g = Reduction of friction
e = electrical insulation
h) solidus (/);
i) a symbol, which indicates the surface-related mass per square metre with a measurement uncertainty of
+/- 30 %.
If the phosphate coating must receive a secondary treatment, the designation needs the following
information:
a) sol
...
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